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ORDER NO.KM60111624C0 G0
Laser Printer
KX-P7105 KX-P7110
© 2001 Kyushu Matsushita Electric Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law.
KX-P7105 / KX-P7110
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KX-P7105 / KX-P7110
CONTENTS
Page
1 Introduction 1.1. Specifications 1.2. Indicators 1.3. Parts Identification 1.4. Component Layout and Paper Path 1.5. Electrical Components and Sensor Boards 1.6. Switches and Solenoids 1.7. Print Process 1.8. Paper Feed 1.9. Laser Scan Unit ( Exposure ) 1.10. Fuser Unit 1.11. Paper Ejection and Paper Switchback 2 Installation, Setup, and Repacking 2.1. Installation Requirements 2.2. Setup 2.3. Repacking 3 Removal and Replacement Procedures 3.1. Front and Rear Covers 3.2. Right, Left and Top Covers 3.3. Laser Scanning Unit ( LSU ) 3.4. Relay Board (B) 3.5. High Voltage Board and Power Supply Unit 3.6. Indicator Board 3.7. Engine Control Board and Toner Empty Sensor Board 3.8. 2nd Feeder I / F Board and Main Control Board 3.9. Fuser Drive Gear 3.10. Fan Motor 3.11. Gear Support Bracket, Relay Board ( A ), Motor, Drive Gear Unit and Paper Empty Sensor Board 3.12. Upper Exit Roller Holder 3.13. Fuser Unit 39 41 42 5 5 10 12 13 14 15 16 18 19 21 22 23 23 23 26 29 29 31 32 32 33 35 35 37 38 38 6 Explanation of Connectors 6.1. Main Control Board 6.2. Engine Control Board 6.3. Registration & Paper Top Sensor Board 6.4. Paper Exit / ADU Paper Jam Sensor Board 6.5. Indicator Board 6.6. Relay Board ( B ) 6.7. Paper Empty Sensor Board 6.8. Toner Empty Sensor Board 6.9. 2nd Feeder I / F Board 7 Component Reference Guide 7.1. Main Control Board 7.2. Engine Control Board 8 Preventative Maintenance 8.1. General 8.2. Recommended Tools 8.3. Recommended Cleaning 8.4. Maintenance Tables 9 Troubleshooting 9.1. Self-Diagnostic Indicators 9.2. Initial Troubleshooting Flowchart 9.3. No Operation 9.4. Print Quality 9.5. Paper Jam 9.6. Call Service 10 Replacement Parts List with Lubrication Guide 10.1. Exterior 10.2. Right Side Parts 10.3. Left Side Parts ( Power Supply Unit and High Voltage Board ) 10.4. Rear and Top Side Parts 10.5. Bottom Side Parts 10.6. Mechanical Base 10.7. Media Tray ( Paper Cassette ) 10.8. Packing 10.9. Main Control Board 10.10. Engine Control Board 51 53 54 54 56 57 58 74 87 89 99 103 10.11. Registration & Paper Top Detection Sensor Board 10.12. Paper Exit / ADU Paper Jam Sensor Board 10.13. Indicator Board 10.14. Toner Empty Sensor Board 10.15. Relay Board (A) 10.16. Relay Board (B) 10.17. Paper Empty Sensor Board 10.18. 2nd Feeder I / F Board 11 Schematic Diagram for printing with A4 size 11.1. Main Control Board 11.2. Engine Control Board 11.3. Sensors, Indicator and Relay Boards 174 175 178 180 181 182 183 188 192 192 192 193 193 193 194 194 195 195 214 221
Page
107 107 112 117 117 117 118 118 118 119 120 120 127 131 131 131 131 132 134 134 137 138 139 149 155 167 167 169
3.14. Pickup, Paper Feed, Registration and Transfer Rollers 46 3.15. Transfer Roller Assembly 48
3.16. Auto Duplex Unit, ADU Registration Roller and ADU Pinch Roller 3.17. Registration Sensor Lever, Paper Top Detection Sensor Lever and Registration & Paper Top Detection Sensor Board 3.18. Paper Empty Sensor Lever 4 Electronic Circuit Description and Diagrams 4.1. Block Diagram 4.2. Connection Diagram 4.3. Power Supply 4.4. Engine Control Board 4.5. Main Control Board 5 Schematic Diagram 5.1. Main Control Board 5.2. Engine Control Board 5.3. Sensors, Indicator and Relay Boards 49
5.4. Paper Empty Sensor Board and 2nd Feeder I / F Board 105
11.4. Paper Empty Sensor Board and 2nd Feeder I / F Board 224
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1 Introduction
1.1.
1.1.1.
Specifications
Printer
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1.1.2.
Paper
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1.1.3.
Interface, Options, Accessories, and Supplies
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1.1.4. 1.1.4.1.
Others About Media
Available Media and Media Size
Available Paper Weights and Capacity
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Recommended Media
Transparency: · To avoid damaging the printer, do not use ink jet transparencies. · Transparencies and adhesive material used on labels should be stable at 205°C ( 400°F ), the printer's maximum temperature. · Re-using transparencies that have been fed through the printer once ( for example, after jams or if the transparency is ejected without being printed ) can reduce the life of the consumables and paper path components. · When using transparencies, and if the print quality is poor, check to ensure the correct side is being printed. Labels: · With any label stock, the labels must completely cover the backing material. Envelope: It is recommended that you purchase only high quality envelopes with diagonal seams, as shown in the diagram below:
High quality envelopes have the following characteristics: · A thin, sharply creased leading edge · Paper weight of 90 g/m2 ( 24 lbs. ) · Flat, free of curls, wrinkles, nicks, etc. Note: Wrinkles may occur in some case, even when using high quality envelopes.
1.1.4.2.
Margins and Print Area
The image ( print area ) is printed a bit smaller than the media size. 4.2 mm ( 0.17" ) is required for top, bottom and side margins. It may be needed to adjust the print margins in the application software to match the allowable printarea.
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1.2.
1.2.1.
Indicators
Printer Panel
1.2.2.
Indicators
Three indicators show the following printer's status. For detailed information on the printer status and recovery, see Section 9.1.
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1.2.3.
PRINT / RESET Button
The printer executes the following action depending on the printer status by pressing this button.
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1.3.
1.3.1.
Parts Identification
Front Side View
1.3.2.
Rear Side View
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1.4.
Component Layout and Paper Path
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1.5.
Electrical Components and Sensor Boards
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1.6.
Switches and Solenoids
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1.7.
Print Process
1.7.1.
Charge
The charge corona applies a high, uniform positive charge to the surface of the organic photoconductor ( OPC ) drum. The charge level is approximately 900 VDC and remains because the OPC drum has a high electrical resistance when concealed in darkness.
1.7.2.
Exposure
The laser beam passes through the collimator lens, is reflected by the polygon mirror, and is focused onto the drum after passing through an image-forming ( ) lens and a reflectionmirror. Wherever the laser beam strikes the drum, the positive charge dissipates. A latent electrical image of two different voltages potentials, which corresponds to the original page, is formed on the OPC drum.
1.7.3.
Development / Cleaning
Development: Non-magnetic toner is supplied to the conductive roller by the toner supply roller. The toner on the conductive roller is positively charged by friction with the toner supply roller, and the doctor blade ensures a thin layer on the surface of theconductive roller. Wherever the conductive roller touches the drum, the positively charged toner is attracted to the latent image on the drum, and the latent image is converted to a visible toner image. A bias voltage of approx. 350 VDC is appliedto the conductive roller to achieve maximum print quality. 16
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Cleaning: After transfer, residual toner remains on the drum surface, and for next printing, the residual toner reaches to the development area via charge and exposure. The charge level of the OPC corresponds to the white background is +900VDC, andthe bias voltage of the conductive roller is approx. +350VDC. Therefor the positively charged residual toner on the OPC drum is attracted and collected to the conductive roller. The charge level of OPC after exposure is +100VDC. So,the printing area of the OPC is cleaned.
1.7.4.
Transfer
As the paper is fed between the drum and the transfer roller, a high negative charge is applied to the back of the paper. The positive toner particles are then attracted from the drum surface to the paper. After transfer, the paper is separatedfrom the drum surface by the curvature of the drum.
1.7.5.
Fusing
The paper passes through the fuser rollers and is subjected to heat and pressure. The fusing temperature is approximately 190°C ( 382.5°F ), and the pressure is approximately 0.36kg/cm ( 3.53N/cm ). This bonds,or fuses, the toner into the paper.
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1.8.
Paper Feed
Media Tray The main motor drives the pickup roller after the pickup solenoid is energized, which engages the pickup roller clutch and feeds a sheet of paper. The paper is pushed to the paper feed roller, which overdrives the paper slightly causing a buckleto ensure the paper is aligned with the stationary registration roller. While triggering the registration sensor notifying the CPU paper is ready to feed. The paper at this point is the same as manual feed. Manual Feed When paper is inserted, it activates the registration sensor. At the proper time, the CPU energizes the registration solenoid that allows the registration roller to rotate, feeding paper to the top sensor.
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1.9.
1.9.1.
Laser Scan Unit ( Exposure )
Operation Theory
The light beam from the laser diode ( light source ) is modulated by the digital signal (nVIDEO) and converted to parallel light waves by the collimator lens. The beam is then sent to the rotating polygon mirror (polygon scanner), where it is reflectedthrough the lens and then focused onto the OPC drum surface. The diameter of the beam is about 80 µm, and the light moves across the surface of the OPC drum in the scanning directionof right to left. As the drum rotates ( sub-scans ), a static image is formed where the laser beam touches the drum surface. The laser beam is also deflected to the timing sensor. This sensor controls the start timing of scanning on the drum, providing a consistent left margin. The CPU uses the timing sensor to detect abnormal signals.
1.9.2.
Laser Beam
The laser beam is pulsed on and off by the digital signal (nVIDEO) to form a latent image of two different voltage potentials on the drum, as shown below.
Item Oscillation Wavelength Output Light Power (OPC Drum Surface)
Laser Diode Specification Minimum Standard 770 785 0.315 0.350
Maximum 800 0.385
nm mW
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1.9.3.
Collimator Lens
The collimator lens converts light from the laser diode to parallel light. This aids in scanning and provides better convergence to a dot.
1.9.4.
Polygon Scanner
The polygon scanner consists of a 6-sided mirror directly driven by a brushless DC motor at a rate 20,078.74 rpm. The laser beam is reflected across the OPC drum by the mirror faces and produces the scan. One mirror face is equal to one main scan.This unit features stable line scanning speed, precision mirror surface reflection angle, reflect-free surfaces, and instant start.
Polygon Scanner Specifications Item Mirror Revolution Specification 6 20,078.74 faces rpm
1.9.5.
Cylindrical Lens and
Lens
Each of the polygon mirror surfaces has a slight imperfection. This prevents the beam from scanning the OPC drum surface at the constant interval in the sub-scan direction. The cylindrical lens and lens are used for correcting this uneven laser scanning.
1.9.6.
Lens
This lens ensures that the beam scans across the surface of the OPC drum at a constant rate. The beam is refracted to parallel light as it passes through the lens to ensure that the dots at the edge of the drum and at the center of the drum areequally spaced. This lens also provides a set focal length for laser beam.
Specifications Item Scanning Width Focusing Light Spot Size Specification 207.43 80 x 90 mm µm
1.9.7.
Timing Sensor
This sensor detects the laser beam and determines the start timing for scanning. A pin photodiode is used as the timing sensor.
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1.10. Fuser Unit
A 600W heat lamp ( halogen lamp ) heats the surface of the teflon-coated heat roller to approximately 190°C ( 374°F ), a thermistor monitors the heat roller temperature, and the CPU controls the ON/OFF timing of the lamp. The thermostat is mounted 2.5mm away from the heat roller. If the ambient temperature reaches 180°C ( 356°F ), the thermostat is opened, and power is removed from the heat lamp. The surface of the thermostat is not as hot as thatof the heat roller. When the thermostat opens, the surface of the heat roller may reach 200°C ( 382°F ), and the system displays E30. If the thermistor opens, the system displays E32. If by chance the thermostat malfunctions a thermalfuse opens. The pressure roller is kept in contact with the heat roller through 2 pressure springs, which apply a pressure of approximately 0.36 kg/cm ( 3.56 N/cm ). Drive is supplied from the main motor via intermediate gears.
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1.11. Paper Ejection and Paper Switchback
A. Normal Printing Mode ( Not Duplex Mode ) After fusing, paper is fed to the output tray by the switchback roller and switchback pinch roller. The paper exit/ADU paper jam sensor detects paper. If paper does not arrive at the sensor within a predetermined period of time, "Jamat A" is displayed, and if paper remains at the sensor beyond a predetermined period, "Jam at B" is displayed on the computer screen. Paper is ejected face down and stored in the output tray.
B. Duplex Mode After fusing, paper is fed to the output tray by the switchback roller and switchback pinch roller. The paper exit/ADU paper jam sensor detects paper. If paper does not arrive at the sensor within a predetermined period of time, "Jamat A" is displayed on the computer screen. At the specified time after the sensor detects the bottom of paper, the switchback roller rotates in reverse direction, turning on the switchback solenoid to move the ratchet lever to Duplex Position.As a result, the paper is fed to the development area through the Auto Duplex Unit ( ADU ) ( see section 1.4 Component Layout and Paper Path ). If paper remains at the sensor beyond a predetermined period, "Jam at E" is displayed.Paper is ejected face down and stored in the output tray.
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2 Installation, Setup, and Repacking
2.1.
2.1.1.
Installation Requirements
Environment
1. Temperature Range :10 °C - 32.5 °C ( 50 °F - 90.5 °F ) ( Temperature fluctuation ± 10 °C per hour or less ) 2. Humidity Range :20% RH - 80% RH ( Humidity fluctuation ± 20 °C per hour or less ) 3. Printer Weight :10 kg ( 22 lbs. ) 4. Place the unit on a stable, level surface. 5. Do not install the unit under the following conditions. a. Extremely high or low temperature b. Extremely high or low humidity c. Direct exposure to sunlight d. Areas of high dust concentration e. Areas of poor ventilation f. Areas exposed to chemical fumes g. Areas with extreme vibration h. Directly in air conditioning flow
2.1.2.
Ventilation Requirements
Ventilation space is needed around the printer, more than 20 mm ( 0.8" ) between the printer and a wall.
2.2.
2.2.1.
Setup
Removing the Packing Material
1. Remove the printer from the plastic bag. 2. Remove all adhesive tape from the printer. Note: Please do not throw away the packing materials. They may be required to ship or transport the printer. To provide optimum print quality, the unit must be kept upright and level at all times.
2.2.2.
(1) (2)
Installing the Toner Cartridge and Drum Unit
Shake the toner cartridge. Remove the shipping cover.
(3)
Remove the protective sheet from the drum unit.
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(4)
Insert the side pins of the toner cartridge into the slots of the drum unit.
(5)
Push down the toner cartridge as shown to lock in place. Note: To prevent any damage to the drum unit, · Do not touch the black drum surface ( A ). · Do not expose to light for more than 5 minutes. · Do not expose to direct sunlight.
(6) (7)
Open the front door. Insert the drum unit into the printer [insert the side pins of the drum unit into the groove (label )].
(8) (9)
Push down as shown to lock in place. Close the front door.
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2.2.3.
(1)
Installing the Upgrade Kit (for PostScript) or RAM Board
Upgrade Kit (for PostScript) (KX-PPSU5) and RAM Board (KX-PEM12 or KX-PEM13) are Options. Remove the Option Cover and Option Cover Plate (2 screws). Install Upgrade Kit (for PostScript) in CN1 or RAM Board in CN2.
(2)
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2.3.
Note:
Repacking
Prepare the unit before shipping. It is highly recommended that users keep the original carton and ALL packing materials. Please follow these instructions when transporting or shipping the printer. · The printer weights about 10 kg {22 lbs}. · Please use the original carton and all of the original packing materials. · Improper repacking of the printer may result in a service charge to remove spilled toner. · Since the printer uses dry toner, extreme care must be taken when handling. The printer should be handled in the upright ( vertical ) position. · Do not ship with drum unit installed in printer. Material Required - Original cartons and packing materials - Newspaper or drop cloth - Shipping tape and scissors (1) Turn off the printer, remove the power cord and all interface cables. Open the front cover.
(2)
(3)
Lift the drum unit up ( 1 ) and slide it out of the printer ( 2 ). · To avoid possible toner spillage, it is recommended to place the drum unit on newspaper or a drop cloth. Caution: · To prevent any damage to the drum unit, observe the following precautions; - Do not touch the black drum surface illustrated below. - Do not expose the drum unit to light for more than 5 minutes. - Do not expose the drum unit to direct sunlight. - Do not keep the drum unit near dust or dirt. - Do not place the drum unit in a high humid area.
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(4)
While pushing the drum unit ( 1 ), lift the toner cartridge up ( 2 ).
(5)
Replace the shipping cover on the toner cartridge.
(6)
Insert the toner cartridge into a plastic bag (1), seal the end of the bag tightly (2), and tape closed (3).
(7)
Wrap the drum unit with the protective sheet to protect the drum surface.
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(8)
Insert the drum unit into a plastic bag and seal the end of the bag tightly. Wipe off any loose toner in and around the printer. Note: · If a toner vacuum is available, it is the best tool for cleaning spilled toner. Do not use a standard office or home vacuum; the toner will not be retained by typical vacuum dust collectors.
(9)
(10) Close the front cover. (11) Repack the printer in the box as shown.
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3 Removal and Replacement Procedures
3.1.
(1)
Front and Rear Covers
Remove the Front Cover by releasing the hooks.
(2)
Remove the Rear Cover by releasing the hooks.
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3.1.1.
(1) (2) (3)
Front Cover Disassembly
Remove the Pinch Roller Holder Assembly ( 2 screws ). Remove the Paper Guide Pinion Gear ( 1 screws ). Remove the Guide Racks ( 2 screw ).
3.1.2.
(1)
Rear Cover Disassembly
Release the Shaft from the hook by pushing the shaft support in the arrow direction. Separate the Shaft, 2 Rollers and 2 Springs.
(2)
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3.2.
3.2.1.
Right, Left and Top Covers
Right Cover
1. Remove the screw. 2. Release the 2 hooks from the bottom side of printer. 3. Remove the Right Cover. 4. Remove the LED Indicator Cover and Continue Button ( 1 screw ).
3.2.2.
Left Cover
1. Remove the screw. 2. Release the 2 hooks from the bottom side of printer. 3. Remove the Left Cover.
3.2.3.
Top Cover
1. Release the 2 hooks from both sides of the printer. 2. Remove the Top Cover.
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3.3.
(1) (2)
Laser Scanning Unit ( LSU )
Before handling, remove the Right, Left and Top Covers ( see Section 3.2 ). Remove the 3 screws. Disconnect the 2 connectors from the LSU.
3.4.
(1) (2) (3)
Relay Board (B)
Before handling, remove the Left Cover ( see Section 3.2 ). Remove the connector from the Relay Board ( B ). Remove the 2 screws. Remove the Relay Board (B).
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3.5.
3.5.1.
(1)
High Voltage Board and Power Supply Unit
High Voltage Board
Before handling, remove the Left Cover ( see Section 3.2 ).
Remove the screw ( A ) and 5 screws ( B ). Caution : Screw ( A ) is different from screws ( B ). When reinstalling the screw, return it to the original position.
(2) (3)
Disconnect the Flat Cable from the High Voltage Board. Remove the High Voltage Board, be careful that High Voltage Terminal Springs are not dropped from the printer and lost.
(4)
Remove the 5 High Voltage Terminal Springs. Caution : When reinstalling the High Voltage Terminal Springs, all springs must be returned to the original position. And the hook of Spring ( A ), ( D ), ( E ) are set into the slits as shown in the following figure.
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3.5.2.
(1) (2)
Power Supply Unit
Disconnect the 2 connectors. Remove the 3 screws ( A ) and 2 screws ( B ). Caution : The screw ( A ) differs from the screw ( B ). When reinstalling the screw, return it to the original position.
(3)
Remove the Power Supply Unit.
3.5.3.
(1)
Power Supply Unit Disassembly
Remove the Inlet Bracket with Power Lead Wire Assembly {4 screws ( A )}. Caution : When reinstalling the terminal of cable, it must be attached tooth side as shown to fix it certainly.
(2)
Remove the Enclosure Cover {2 screws ( A ) and 2 screws ( B )}.
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3.6.
(1) (2)
Indicator Board
Before handling, remove the Right Cover ( see Section 3.2 ). Remove the Indicator Board. Disconnect the Flat Cable from the Indicator Board.
3.7.
3.7.1.
(1) (2)
Engine Control Board and Toner Empty Sensor Board
Engine Control Board
Before handling, remove the Right Cover ( see Section 3.2 ).
Remove the 2 screws. Remove the Engine Board Shield Cover.
(3) (4)
Disconnect the 13 connectors and 4 Flat Cables. Remove the Engine Control Board ( 5 screws ).
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3.7.2.
(1)
Toner Empty Sensor Board
Remove 2 screws ( A ) and 2 screws ( B ). Caution : Screw ( A ) is different from screw ( B ). When reinstalling the screw ( A ), return it to the original position.
(2) (3) (4) (5)
Remove the Engine Board Shield Base. Remove the screw (A). Remove the Toner Empty Sensor Board. Disconnect the connector CN451.
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3.8.
2nd Feeder I / F Board and Main Control Board
Before handling, perform the following steps A - B : A. Remove the Right Cover ( see Section 3.2 ). B. Remove the Engine Board Shield Cover and disconnect the Flat Cable from CN001 (see Section 3.7.1).
3.8.1.
(1) (2) (3) (4) (5)
2nd Feeder I / F Board and Main Control Board
Disconnect the connector ( CN 452 ). Remove the 2nd Feeder I/F Board ( 1 screw ). Remove the Option Shield Cover ( 2 screws ). Remove the 8 screws. Remove the Main Board Shield Cover. Caution: · Remove or install the Main Board Shield Cover with care to prevent damage to surface of Flat Cable from the edge of Main Board Shield Cover. · When reinstalling the Flat Cable, set the mark on the Flat Cable as shown in following figure.
(6) (7)
Disconnect the 2 Flat Cables. Remove the Engine Control Board ( 6 screws ).
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3.8.2.
(1) (2)
Main Control Board Disassembly
Remove 2 screws ( A ) and 2 screws ( B ). Remove the Connector Shield Cover. Caution: For KX-P7110 only, when replacing the Connector Shield Cover, remove the Mac ID Label from the original Connector Shield Cover and stick it on the new Connector Shield Cover.
3.9.
Fuser Drive Gear
Before handling, perform the following steps A - C : A. Remove the Right Cover ( see Section 3.2 ). B. Remove the Engine Control Board and Engine Board Shield Base ( see Section 3.7.1 and Section 3.7.2 ). C. Remove the 2nd Feeder I/F Board and Main Control Board ( see Section 3.8 ). (1) (2) (3) Remove 6 screws. Remove the Fuser Drive Gear Bracket. Remove the Fuser Drive Gear and Intermediate Gear. Caution: Be careful not to lose the plastic ring behind the Fuser Drive Gear.
3.10. Fan Motor
Before handling, perform the following steps A - B : A. Remove the Right and Left Covers ( see Section 3.2 ). B. Remove the Engine Board Shield Cover ( see Section 3.7.1 ). (1) (2) (3) Remove the 2 screws. Remove the Fan Motor. Disconnect connector CN 018 on the Engine Control Board.
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3.11. Gear Support Bracket, Relay Board ( A ), Motor, Drive Gear Unit and Paper Empty Sensor Board
Before handling, perform the following steps A - C : A. Remove the Right Cover ( see Section 3.2 ). B. Remove the Engine Board Shield Cover ( see Section 3.7.1 ). C. Remove the Main Board Shield Cover ( see Section 3.8.1 ).
3.11.1. Gear Support Bracket
(1) Disconnect the connector CN012 from the Engine Control Board. Remove screw ( A ) and 4 screws ( B ). Caution: Screw (A) is different from screw (B). When reinstalling the screw, return it to the original position. (3) (4) Remove the Gear Support Bracket and solenoid. If necessary, remove the 8 gears from the chassis.
(2)
3.11.2. Relay Board ( A ), Drive Gear Unit and Motor
(1) Disconnect the connector CN017 from the Engine Control Board. Remove the screw (A). Remove the cable from the Drive Gear Unit. Remove the screw (A ) and 5 screws (B). Caution: The screw (A) differs from the screw (B). When reinstalling the screw, return it to the original position. (5) (6) (7) Remove the Drive Gear Unit. Remove the 2 screws (C). Remove the Relay Board ( A ).
(2) (3) (4)
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3.11.3. Drive Gear Unit Disassembly
(1) (2) (3) (4) Remove the Motor ( 2 screws ) from the Drive Gear Unit. Remove the 5 screws. Remove the Motor Bracket. All gears can be removed after removing the plastic ring.
3.11.4. Paper Empty Sensor Board
(1) (2) (3) Remove the screw. Remove the Paper Empty Sensor Board. Disconnect connector CN 450.
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3.12. Upper Exit Roller Holder
Before handling, perform the following steps A - B : A. Remove the Right, Left and Top Covers ( see Section 3.2 ). B. Remove the Engine Board Shield Cover ( see Section 3.7.1 ).
3.12.1. Upper Exit Roller Holder
(1) (2) (3) Remove the 4 screws. Separate the Upper Exit Roller Holder. Disconnect connector CN013 on the Engine Control Board.
3.12.1.1. Upper Exit Roller Holder Disassembly
1. Remove the 2 screws. 2. Separate the Holder Cover with solenoid from the Upper Exit Roller Holder. 3. Remove the gears from the roller holder.
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3.13. Fuser Unit
Before performing the following steps, remove the upper Exit Roller Holder ( see Section 3.12 ). (1) (2) Disconnect connector CN007 on the Engine Control Board. Disconnect the connector CN202 from the Power Supply Unit. Disconnect the connector CN407 from the Relay Board (B). Remove the 4 screws. Remove the Fuser Unit.
(3) (4) (5)
3.13.1. Fuser Unit Disassembly
(1) (2) (3) (4) Remove the Lower Exit Roller Gear. Remove the 2 black screws. Separate the Heat Roller Holder from the Fuser Unit Base. Remove the Pressure Roller, 2 bushings, 2 springs and Lower Exit Roller from the Heat Roller Holder. If necessary, remove the Pinch Rollers and Cleaning Rollers. Caution: · When reinstalling the Pinch Roller and Spring, the spring hook is attached upward to prevent any damage to the printing media as shown following figure.
(5)
· When reinstalling the Cleaning Roller and Spring, the spring hook is attached downward and the cut edge of the cleaning roller is located as shown following figure to prevent any damage to the Pressure Roller.
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Note: When reinstalling the exit roller rubber to the lower exit roller shaft, ensure it is installed as shown in figure-( A ).
3.13.2. Heat Lamp
(1) (2) Remove the Side Fuser Cover ( 2 screws ). Remove the screw ( A ) and screw ( B ) from the ends of Heat Lamp Terminals. Slide out the Heat Lamp. Caution: · Do not touch the heat lamp with your fingers. a. It may be hot. b. The oil and dirt from your fingers will contaminate the surface, which will result in damaging the heat lamp when it is turned on. · When reinstalling the heat lamp, set the terminal of the heat lamp in the center of the Heat Roller to prevent from shorting, or shock, fire or other hazards may occur. {see figure ( A )} · When reinstalling the Heat Lamp, the terminal cable must be attached at the rivet side as shown to fix them certainly. {see figure ( B )}
(3)
3.13.3. Heat Roller
(1) (2) (3) Remove the screw and Thermistor. Remove the Heat Roller Gear and Bushing. Remove the Heat Roller with care to prevent scratching or damage to the surface of the Heat Roller.
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KX-P7105 / KX-P7110
3.13.4. Thermostat
(1) (2) Remove the 2 screw ( A ) and Thermal Fuse. Remove the screw ( B ) and Thermostat.
Caution : · When reinstalling the thermostat, both end terminals must be positioned under the terminals of thermal fuse and lead wire as shown in the following figure, or thermostat cannot properly measure the surface temperature of the heat roller becausethe distance between the surface of heat roller and thermostat may change. · When reinstalling the thermal fuse and thermostat, the screws must be tightened in order (1), (2), (3) to position them correctly as shown in the following figure.
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KX-P7105 / KX-P7110
3.13.5. Paper Exit / ADU Paper Jam Sensor Lever and Paper Exit / ADU Paper Jam Sensor Board
1. Remove the Fuser Unit ( see section 3.13 ). 2. Remove the Paper Exit/ADU Paper Jam Sensor Lever with spring. 3. Disconnect the flat cable. 4. Remove the Paper/ADU Paper Jam Sensor Board by releasing the hooks.
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KX-P7105 / KX-P7110
3.14. Pickup, Paper Feed, Registration and Transfer Rollers
Before handling, perform the following steps A - B : A. Remove the Gear Support Bracket and 8 gears ( see Section 3.11.1 ). B. Remove the Front Cover ( see Section 3.1 ).
3.14.1. Pickup Roller and Pickup Solenoid
1. Release the bushing hook and slide out the bushing. 2. Slide the Pickup Roller Shaft with gears in the arrow direction, then remove the Pickup Roller. 3. If necessary, remove the Pickup Roller Gears and bushing by releasing the gear hook from the Pickup Roller Shaft. Then, remove the Pickup Roller Shaft. 4. Disconnect the connector CN011 from the Engine Control Board. 5. The Pickup Roller Lever and Pickup Solenoid and spring can be removed from the chassis frame by removing the 2 screws.
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KX-P7105 / KX-P7110
3.14.2. Paper Feed Roller / Registration Roller 3.14.2.1. Paper Feed Roller
1. Slide out the bushing from the Paper Feed Roller Shaft. 2. Remove the Paper Feed Roller Gear and Drive Wheel by releasing the hook from the Paper Feed Roller Shaft. Then, remove the Paper Feed Roller Shaft.
3.14.2.2. Registration Roller
1. Slide out the bushing from the Registration Roller Shaft. 2. Remove the Registration Roller Gear by releasing the gear hook from the Registration Roller Shaft. Then, remove the Registration Roller Shaft.
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KX-P7105 / KX-P7110
3.15. Transfer Roller Assembly
Before handling, perform the following step. A. Remove the Front Cover ( see Section 3.1 ). 1. Remove the 2 Transfer Roller Holders. 2. Remove the Transfer Roller Assembly by pulling up it. Caution: · Do not touch the surface of Transfer Roller to prevent any print quality problems. · When reinstalling the Transfer Roller Assembly, the bushings are set as shown in the figure (A).
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KX-P7105 / KX-P7110
3.16. Auto Duplex Unit, ADU Registration Roller and ADU Pinch Roller
Before handling, perform the following steps A-B : A. Remove the Paper Cassette and OPC Drum Unit. B. Place the printer up side down.
3.16.1. Auto Duplex Unit ( ADU )
(1) Remove the 2 screws ( A ) and 4 screws ( B ). Caution: Screw ( A ) is different from screws ( B ). When reinstalling the screw ( A ), return it to the original position. (2) (3) Remove the Bottom Stay. Remove the Auto Duplex Unit with care to prevent damage to the A/D Unit Joint Gear {4 screws and screws (C)}.
3.16.1.1. Auto Duplex Pinch and Registration Rollers
1. Remove the 3 plastic rings and 2 springs. 2. Remove the A/D Roller Shaft and 2 Auto Duplex Pinch Rollers. 3. Remove the E-ring. 4. Remove the A/D Unit Joint Gear from the ADU Registration Roller Shaft. The Registration Roller Shaft and 2 bushings can be remove from the Auto Duplex Unit frame. Note: When reinstalling the A/D Rollers Shaft to ADU Pinch Roller Plate, ensure that it is installed as shown in Fig. ( A ).
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KX-P7105 / KX-P7110
3.16.1.2. Auto Duplex Disassembly
1. The ADU Pinch Roller Plate can be separated from the Registration Roller Plate by removing the screw ( A ). 2. The ADU Jam Release Pan can be separated from the Registration Roller Plate by removing the 2 screws ( B ) and 2 springs. Caution: The screw (A) differs from the screw (B). When reinstalling the screw, return it to the original position.
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KX-P7105 / KX-P7110
3.17. Registration Sensor Lever, Paper Top Detection Sensor Lever and Registration & Paper Top Detection Sensor Board
Before handling, perform the following steps A - D : A. Remove the Paper Cassette and OPC Drum Unit. B. Remove the Left and Right Covers ( see Sections 3.2 ). C. Place the printer upside down. D. Remove the Auto Duplex Unit ( see Section 3.16 ). 1. Remove the screw, and disconnect the flat cable. 2. Remove the Registration & Paper Top Detection Sensor Board. 3. Remove the Registration Sensor Lever by releasing the lever axis from the projection. 4. Remove the Paper Top Detection Sensor Lever by releasing the lever axis from the chassis.
Caution : When removing or installing the Registration Sensor Lever, Paper Top Detection Sensor Lever and Registration & Paper Top Detection Sensor Board, take care to prevent damage to the rib of parts ( A ).
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KX-P7105 / KX-P7110
Caution : When reinstalling the Registration Sensor Lever, Paper Top Detection Sensor Lever and Registration & Paper Top Detection Sensor Board, the Registration Sensor and Paper Top Detection Sensor Levers must be positioned as shown in thefollowing figure ( A ).
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KX-P7105 / KX-P7110
3.18. Paper Empty Sensor Lever
Before handling, perform the following steps A - D : A. Remove the Paper Cassette and OPC Drum Unit. B. Remove the Left and Right Covers ( see Sections 3.2 ). C. Place the printer upside down. D. Remove the Auto Duplex Unit ( see Section 3.16 ). 1. Remove the Paper Empty Sensor Lever.
Caution : When reinstalling the Paper Empty Sensor Lever, take care to prevent damage to the rib of parts ( A ).
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KX-P7105 / KX-P7110
4 Electronic Circuit Description and Diagrams
4.1.
4.1.1.
Block Diagram
Main Control Board Block Diagram
CN1 Optional PostScript Upgrade Kit I/F CN2 Optional RAM Board I/F
IC3 ROM (Standard)
IC5 SDRAM (Standard)
D12
CN3 Network I/F (Only for KX-P7110)
LED IC7 IC6 Mac & Phy IC1 CPU ASIC EEPROM IC2 2.5V
CN9 CN4
Reset IC
Engine I/F
To Engine Control Board
3.3V
CN5
IC10 Regulator 2.5V IC12 Regulator
X1 OSC (50MHz) X2 OSC (48MHz) X3 OSC (53MHz)
(Main Control Board)
CN6 Panel I/F
54
IEEE 1284 I/F
USB I/F
KX-P7105 / KX-P7110
4.1.2.
Engine Control Block Diagram
Power Supply Unit
+24V Rectifier Noise Filter Thermistor +24V IR nCHGCTL nDBCH Voltage Control Circuit Voltage Detector Front Door Interlock Switch nTRCTL TECTL nDB nTR Transfer Current TE_LED Heat Lamp Fuser Driver
Fuser Unit
Thermister Thermal Fuse
+5V
High Voltage Supply Unit
Thermostat
DEV BIAS Grid Voltage Charger Current OPC Drum
Developer Toner Box
Toner Empty Sensor Board
Toner Empty Sensor
OPC Drum Unit
TH
Main Control Board
Engine Control Board
+24V IR
TESEN 5V 24V +5V +24V +24V IR (GND) (GND) HV Driver nFCTL FANERR FAN FANPWR OPC Drum Unit Interlock Switch +5V
FAN Control Circuit
USB
nFSRCTL nVIDEO nHSYNC
Fuser Control Circuit
TH TESEN
Parallel
+5V IR +24V IR nSNRCLK Polygon Motor I/F Circuit nSNRCTL nSNRLD
FANERR +24V IR DOPEN FANCTL SNRCLK SNRCTL nSNRLD PUNIT nCS LD Driver
LSU
IC004 CPU
IC002
Ethernet (Only for KX-P7110)
IC005
EEPROM 2 k bit
EEPCS EEPCLK EEPDO EEPDI
SCK2 SO2 SI2
IC001 ASIC
APC Controller
nHSYNC nVIDEO nLDENB nADJUST +24V IR
+5V PPRDY
ROM 16KB
X001
2ch Stepping Motor Controller
SMA SMnA SMB SMnB
IC006
Bipoler Moter Driver
CPUCLK RAM 512 Byte
M
2nd Feeder (Option)
10_CTL 11_CTL SM1A +24V +5V CLOCK_OP 2nd Feeder I/F Circuit nMOEN_OP nPUCTL_OP nOPTION nPNON_OP +5V +24V Pick Driver +24V Pick Solenoid nRST nPUCTL_OP nOPTION nPNON_OP IC003 Recet IC nSM1EN
nPURGE,
nPRDY,nTOP,nSBSY,SXD
nPSAVE,
nPRINT,CCLK,nCBSY,CXD
2nd Feeder I/F Board
nKEY
PUCTL
READY ERROR TONER nREGSEN nTOPSEN
REGCTL
Regist Driver +24V Regist Solenoid
EXITCTL PNON
Exit Driver Switchback Solenoid
Indicator Board
Ready Error Toner/Process Switch
Regist/Top Sensor Board
Registration Top Sensor Sensor nEXITSEN
Exit Sensor Board
Exit Sensor
Paper Empty Sensor Board
Paper Empty Sensor
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KX-P7105 / KX-P7110
4.2.
Connection Diagram
Power SW Halogen Lamp Thermal Fuse Thermostat
Connection Diagram
Inlet Thermistor Fuser FG Engine Control PCB
CN202 LAMP 1 1 (NC) 2 COMMON 3 CN011 24VGND 1 2 PUSOL CTL CN012 1 24VGND REGSOL CTL 2 CN014 +5V 1 5VGND 2 5VGND 3 nREGSEN 4 nTOPSEN 5 CN015 +5VSP 1 5VGND 2 5VGND 3 nEXITSEN 4 CN013 1 24VGND EXITSOL CTL 2 CN401 5 +5VSP 4 5VGND 3 5VGND 2 nREGSEN 1 nTOPSEN CN402 4 +5VSP 3 5VGND 2 5VGND 1 nEXITSEN
Pickup Solenoid Regist Solenoid
CN201 1 Live 2 Neutral
CN007 1 +5V 2 TH CN005 1 nFCTL 2 5VGND 3 +5V 4 24VGND 5 24VGND 6 +24V 7 +24V CN008 1 +24VIR 2 24VGND 3 24VGND 4 nCHGCTL 5 nDBCH 6 nDB 7 nTRCTL 8 nTR 9 +5V 10 nTECTL
Power Supply Unit (PSU)
CN251 nFCTL 1 5VGND 2 +5V 3 24VGND 4 24VGND 5 +24V 6 +24V 7
Regist Top Sensor Sensor
High Voltage Power Supply Unit (HVU)
CN501 nTECTL 1 +5V 2 nTR 3 nTRCTL 4 nDB 5 nDBCH 6 nCHGCTL 7 24VGND 8 24VGND 9 10 +24VIR 1 2 3 Charge Grid Dev.Bias
ADU Chute
FG
Exit Sensor Switchback Solenoid
Regist Shaft
Relay Board (A)
FG
Toner Empty Sensor PCB
TE_LED
Drum Unit
Relay Board (B) Transfer Chute
CN407 NC 3 GND 2 NC 1
+24V 24VGND +24VIR +5V (NC) +5V(LD)
CN006 1 2 3 CN003 1 2 3 CN002 1 2 3 4 5 6 7 CN010 1 2 3 4 5 CN019 1 2 3 CN450 1 5VGND 2 PNON 3 +5VSP
Door Interlock SW Process Interlock SW LSU LD
4
Transfer
Transfer Roller
FG
CN451 1 nTESEN 2 5VGND
CN009 1 nTESEN 2 5VGND
Indicator Board
Ready CN406 +5V 6 nKEY 5 nLED0 0 4 nLED0 1 3 nLED0 2 2 5VGND 1
Main Control PCB
CN6 1 +5V 2 nKEY 3 nLED0 0 4 nLED0 1 5 nLED0 2 6 5VGND nTOP GND nSBSY GND nVIDEO GND nHSYNC GND nRST GND CXD GND 1 2 3 4 5 6 7 8 9 10 11 12
+5V(LD) 5VGND nVIDEO 5VGND nLDON nHSYNC nADUST 13 14 15 16 17 18 19 20 21 22 23 24 5VGND CXD 5VGND nPURGE 5VGND nHSYNC 5VGND nVIDEO 5VGND nSBSY 5VGND nTOP
Toner/ Process
Error Push SW
CN5 CCLK 13 GND 14 SXD 15 GND 16 nPRINT 17 GND 18 nCBUSY 19 +5V 20 nPRDY 21 22 +5V PPRDY 23 24 +5V
CN001 1 nPSAVE 2 PPRDY 3 +5V 4 nPRDY 5 +5V 6 nCBUSY 7 +5V 8 nPRINT 9 5VGND 10 SXD 11 5VGND 12 CCLK
nSNRCLK nSNRLD nSNRCTL 24VGND +24V
Polygon Motor
5VGND PNON +5VSP
Paper Empty Sensor
IEEE1284 Parallel
CN4
Oprion PS ROM PCB I/F CN
CN1
USB
CN9
Oprion PS ROM PCB
CN1
A OUT nA OUT nB OUT BOUT FAN PWR 24VGND FAN ERR
CN017 1 2 3 4 CN018 1 2 3
Pulse Motor (PM Bipolar type)
FAN
Ethernet (Only for KX-P7110)
CN2 CN3
Oprion RAM PCB
CN004 24VGND 1 nMOEN_OP 2 CLOCK_OP 3 +24V 4 nPUCTL_OP 5 nOPTION 6 +5V 7 nPNON_OP 8 5VGND 9
Oprion RAM PCB I/F CN
2nd Feeder I/F Board (Only for KX-P7110)
CN2
56
CN452
CN453
KX-P7105 / KX-P7110
4.3.
Power Supply
The power supply circuit generates +5Vdc and +24Vdc. It also supplies AC Voltage to the halogen heat lamp in the fuser unit.
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KX-P7105 / KX-P7110
4.4.
4.4.1.
Engine Control Board
ASIC ( KME )
(A) This block is the serial communication interface with the Engine CPU ( IC004 ). (B) This block is the Stepping Motor Controller ( CH0 ) to control the main motor. (C) This block is the Stepping Motor Controller ( CH1 ) to control the 2nd Feeder motor. (D) This block is the LSU Controller, and it consists of laser enable, power adjust and video data. (E) This block generates 12 MHz clock signal and supply to the peripheral devices.
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KX-P7105 / KX-P7110
4.4.2.
Clock Circuit
The system clock ( 12.00MHz ) is generated by IC001 and X001, and it is supplied to the CPU ( IC004 ).
4.4.3.
Reset Circuit
Reset signal is generated when the power is turned on. The reset circuit initializes the CPU ( IC004 ), the ASIC ( IC001 ). Approximately 100~800 msec after turning on the power, pin4 of IC003 goes high.
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KX-P7105 / KX-P7110
4.4.4.
Main Motor Drive Circuit
The main motor ( 2-phase stepping motor ) is driven by IC006 ( bipolar constant current driver ). The SMOA, SMONA, SMOB and SMONB signals shown below are used to control motor direction. when the signals are output as shown below, the main motor rotates. Full Speed Mode ( 2 phase excitation ):
Half speed Mode ( 1-2 phase ( half step ) excitation ):
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KX-P7105 / KX-P7110
IN 1 or 4 L L H H
Motor Driver True Table IN 2 or 3 OUT 1 or 4 L OFF H L L H H OFF
OUT 2 or 3 OFF H L OFF
Note: Motor Current will be cut off in case of "OFF" condition above.
Motor Driver True Table for Current Chopping Level I1 Current ratio L 100% H 33%
I0 L L
Mode 1st Hold for rotating Warm Up Printing (Plain Paper / Transparency) Printing (Other Media) Manual Feed (Catching a Paper) If printing Data is more than approx. 2.5MB Last Hold after rotating Stand by / Ready / Sleep / Error
Motor Drive Mode Speed Stop Full Full Half Full Half Stop Stop
Current ratio 33% 100% 100% 100% 100% 100% 100% OFF
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KX-P7105 / KX-P7110
4.4.5.
Laser Scanning Unit Control Circuit
The laser unit consists of laser drive circuit and scanner motor drive circuit. Laser control signals are as follows.
nVIDEO: nLDON: nHSYNC: nADJUST: nSNRCTL: nSNRLD: nSNRCLK: This is actual data being printed. When the nLDON signal is low, the laser unit is activated. When front door is opened, the laser unit is deactivated. This is a horizontal synchronizing signal sent from a timing sensor ( laser beam detect sensor ) which detects horizontal position of the laser beam across drum. When the nADJUST signal is low, APC ( Auto Power Control ) is activated. This is a control signal for the scanner motor. The scanner motor speed is maintained at approx. 20K rpm by a PLL ( Phase Locked Loop ). While the scanner motor rotates ( approx. 20K rpm ), nSNRLD is low. This is a reference clock of the scanner motor ( approx. 2KHz ).
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KX-P7105 / KX-P7110
4.4.6.
Fuser Temperature Control Circuit
The fuser temperature is controlled by IC004 ( Engine CPU ). IC004 has an analog to digital ( A/D ) converter ( AN0-AN7 ). Thermistor TH is connected to IC004 ( AN0 ). When IC004 ( Pin31 ) is low, Q010 is turned off. And Q4 is turned on.Then Heat lamp inside fuser unit is turned on. Abnormal temperature detection circuit consists of the following 2 sub-sections. 1. Abnormally Low Temperature Detection Abnormally low temperature is detected by IC004 ( Engine CPU ) programming. 2. Abnormally High Temperature Detection Abnormally high temperature is detected by IC004 ( Engine CPU ) programming. When front door is opened, the fuser lamp is shut off.
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KX-P7105 / KX-P7110
4.4.7.
High Voltage Control Circuit
1. Charge Control Circuit This circuit consists of a DC-DC converter, which boosts +24V to approximately +5.4kV ( constant current approx. +300µA ) for the charge corona. nCHGCTL signal controls the charge output. If the signal goes low,the output is turned on. 2. Grid Circuit When the charge circuit is activated ( when the signal nCHGCTL is low ), this circuit is activated and approximately +900V is generated on the grid. 3. Development Bias Control Circuit When the charge circuit is activated ( when the signal nCHGCTL is low ), this circuit is activated. This voltage is changed between +100V and +500V in accordance with the PWM ( Pulse Width Modulation ) signal nDB when the signal nDBCH is low. Also approximately - 150V is generated when signal nDB and nDBCH is high. 4. Transfer Control Circuit This circuit consists of a DC-DC converter, which boosts +24V to -400V -- -3000V ( constant current ). This current is changed between -4µA and -20µA in accordance with the PWM ( Pulse Width Modulation ) signal nTR when the signal nTRCTL is high. 5. Transfer Roller Cleaning Control Circuit This circuit consists of a DC-DC converter, which boosts +24V to +1500V. This voltage is generated when signal nTR is high and nTRCTL is low.
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KX-P7105 / KX-P7110
4.4.8.
EEPROM Control Circuit
This printer has 2kbit EEPROM ( IC005 ). Page Count Data, Calibration Data, etc. are saved on the IC. The EEPROM control signals are explained as follows.
EEPCS: EEPCLK: EEPDO: EEPDI: This This This This is is is is the the the the chip select signal. serial data transfer clock. serial data from CPU ( IC004 ) to EEPROM ( IC005 ). serial data from EEPROM ( IC005 ) to CPU ( IC004 ).
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KX-P7105 / KX-P7110
4.4.9.
Safety Interlock SW
This printer has two safety interlock switches: front door safety interlock switch, and an OPC drum unit safety interlock switch. +24V power is supplied to the front door safety interlock switch. When the front door is opened, the frontdoor safety interlock switch is opened and shuts off the main motor driver power and the high voltage unit power. As a result, the comparator output at pin1 of IC9 is changed from a high level to a low level. IC004 ( CPU ) receives this signal andturns off the main motor control signal, the laser scanning unit, etc. When the OPC drum unit is not installed, the OPC drum unit safety interlock switch is opened and shuts off the +5V power for the laser diode. IC004 ( CPU ) and IC001 (ASIC ) receive this +5V power condition and turn off the main motor control signal, the laser control signals, etc.
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KX-P7105 / KX-P7110
4.4.10. Solenoids Control Circuit
This printer has three solenoids: pickup solenoid, registration solenoid and a switchback solenoid.
4.4.10.1. The Pickup Control Solenoid Drive Circuit
The pickup solenoid is used for picking up the media from the media tray. The CPU IC004 outputs high level PUCTL signal from pin41 to the transistor Q023. The transistor Q023 and Q013 are turned on and supplies +24V power to the solenoid.
4.4.10.2. The Registration Solenoid Driver Circuit
The registration solenoid is used for controlling Registration Roller rotation. The CPU IC004 outputs high level REGCTL signal from pin42 to the transistor Q024. The transistor Q024 and Q014 are turned on and supplies +24V power to thesolenoid.
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KX-P7105 / KX-P7110
4.4.10.3. The Switchback Solenoid Drive Control Circuit
The switchback solenoid is used for controlling media switchback when the printer is auto duplex printing. The CPU IC11 outputs high level EXITCTL signal from pin43 to the transistor Q025. The transistor Q025 and Q015 are turned on and supplies +24Vpower to the solenoid.
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KX-P7105 / KX-P7110
4.4.11. Sensors Circuit
The printer has three photo sensors: Registration sensor, Top sensor and Exit sensor.
4.4.11.1. Registration Sensor Circuit
Registration sensor detects that the media is in front of the Registration Roller. When the registration sensor detects the media, nREGSEN signal changes from high level to low level.
4.4.11.2. Top Sensor Circuit
Top sensor detects that the media has past the Registration Roller. When the top sensor detects the media, nTOPSEN signal changes from high level to low level. This nTOPSEN signal is used for printing start trigger and Top Margin Adjustment.
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KX-P7105 / KX-P7110
4.4.11.3. Exit Sensor Circuit
Exit sensor detects that the media is at the rear of the Fuser Roller ( Exit of the printer ). When the exit sensor detects the media, nEXITSEN signal changes from high level to low level. +5VSP is the power of the photo sensors. When the5VCTL signal at pin32 of IC004 ( CPU ) is low level, the transistor Q016 is turned on. This supplies +5V power to the photo sensors.
4.4.11.4. Paper Empty Sensor Circuit
Paper sensor detects that the media is at the Paper Cassette or not. When the media is set in the Paper Cassette, PNON signal becomes low level. +5VSP is the power of the photo sensors. When the 5VCTL signal at pin32 of IC004 ( CPU ) islow level, the transistor Q016 is turned on. This supplies +5V power to the photo sensors.
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KX-P7105 / KX-P7110
4.4.11.5. Toner Empty Sensor Circuit
Toner empty sensor detects the shortage of toner. IC004 ( CPU ) sends the nTECTL ( pin7, IC004 ) signal to Q009. When the nTECTL is low level, transistors Q009 and Q003 are turned on. and LED D517 emits light. If the toner is shorted ( empty ),the light from LED D517 passes through the lens of the Toner Cartridge. When the photo transistor PI451 receives the light, the PI451 is turned on, and the TESEN ( pin4, IC004 ) signal becomes low.
4.4.12. Fan Control Circuit
FANCTL: 1. Full Power Mode When FANCTL signal ( pin 6, IC004 ) is high, pin 7 of IC002 goes high, transistors Q018 and Q020 are turned on. This supplies +24V Power to Fan motor and rotates the Fan. 2. Reducing Power Mode ( Quiet Mode ) Pulse signal ( see below ) is output from pin 6 of IC004.
This pulse signal is integrated by R137 and C108. Voltage of ( A ) is stabilized at approx. 2V. Pin 6 of IC002 is 0V. When the voltage of ( B ) is lower than the voltage of ( A ), pin 7 of IC002 goes high, Q018 and Q020 are turned on, then the voltage of ( B ) increases. When the voltage of ( B ) is higher than ( A ), pin 7 of IC002 goes low, Q018 and Q020 areturned off, then voltage of ( B ) decreases. Thus the voltage of ( B ) is controlled almost same as the voltage of ( A ) ( = approx. 2V ). Since the resistor network of R141 and R142 divide the voltage of ( C ) into 1/8, the voltageof ( C ) is controlled approx. 16V ( = 2V x 8 ).
FAN Control Mode Mode Warm Up Printing Others FAN Power Full Full Reduced
FANERR: This signal is used for detecting whether the rotation of fan motor is proper or not. When the fan motor is not rotating properly or is locked, this signal becomes a high and inputted into pin18 of IC004. 71
KX-P7105 / KX-P7110
4.4.13. 2nd Feeder I / F Circuit
The 2nd Feeder control signals are explained as follows.
CLOCK_OP: nMOEN_OP: nPUCTL_OP: nOPTION: nPNON_OP: This is the clock signal. 2nd Feeder Board generates motor drive signals for 2nd Feeder Motor from this clock signal. This is the control signal for 2nd Feeder Motor. When IC001 sends the low level nMOEN_OP signal, the 2nd Feeder Motor is rotated. This is the control signal for the pickup solenoid in the 2nd Feeder. When IC004 sends the low level nPUCTL_OP signal, the pickup solenoid is activated. This is the detection signal whether the 2nd Feeder is connected to the printer or not. When the 2nd Feeder is connected to the printer, the nOPTION signal becomes low level. This is the detection signal whether the media is at the 2nd Feeder Paper Cassette or not. When the media is set in the 2nd Feeder Paper Cassette, nPNON_OP signal becomes low level.
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KX-P7105 / KX-P7110
4.4.14. Timing Chart 4.4.14.1. Vertical Print Timing
4.4.14.2. Horizontal Print Timing ( Relationship between nHSYNC and Video Signal )
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KX-P7105 / KX-P7110
4.5.
4.5.1.
Main Control Board
Data Flow
(1) The print data transfer by the host computer is received by Parallel I/F, USB I/F or Network I/F ( for KX-P7110 only ) controlled by CPU ASIC ( IC1 ), and stored in the system memory.The system memory is also controlled by the CPU ASIC ( IC1 ) (2) The print data stored in the system memory is analyzed and rendered into an image ( ex. the arrangement and generation of fonts and images ) by CPU ASIC ( IC1 ), and the image data is stored in the system memory. (3) The image data stored in the memory is converted into video data by the CPU ASIC ( IC1 ) internal Video Data Generator ( VDG ) and the video data is outputted to the ECU ( Engine Control Unit ) in responseto requests.
The following indicates the data flow when communicating with the host computer using these interfaces.
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KX-P7105 / KX-P7110
4.5.2.
Power Supply
There are some circuits in the main control board that are operated by +3.3V or +2.5V. IC10 converts the voltage from +5V to +3.3V. IC12 converts the voltage from +5V to +2.5V.
4.5.3.
Reset Circuit
IC2 is RESET control IC. IC2 output reset signal wave on pin4, after it find the voltage of 2.5V line. If it is equal 2.1V, pin4 output " H " level after delay time. When power sw is turned on, reset timing is 38-138ms.
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KX-P7105 / KX-P7110
4.5.4.
Clock Circuit
50MHz-CLK is for system ( CPU, memory and ROM control ) and for Network I/F communication. 48MHz-CLK is for USB controller. 53.84MHz-CLK is for Engine I/F communication.
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KX-P7105 / KX-P7110
4.5.5.
CPU ASIC ( IC1 ) overview
The CPU_ASIC ( IC 1) is a high-performance integrated printer processor that combines a CPU core, a bit block transfer (BitBLT) controller, a video data generator(VDG), and numerous printer controller features on a single chip. The CPU_ASIC has the function macro modules as follows.
CPU SDRAM I/F ROM I/F VDG BitBLT USB I/F PCI I/F (for Network I/F) Timer IO I/F IEEE1284 I/F
The CPU_ASIC controls the following functions. · Process the print data from host PC · Initialization and control of Memories (ROM/Flash/SDRAM) · Control the Interface (USB/ IEEE1284/ PCI/ Engine) port · Control of LED and detection of key on the front panel The CPU_ASIC ( IC1) has the following three types of external bus interface for connection with peripheral devices. · ROM Bus · SDRAM Bus · PCI Bus The ROM Bus, which operates asynchronously with the CPU clock, is to be used for connection with the Mask ROM or the Flash ROM devices (IC3, Option ROM CN) and controls the devices directly. The SDRAM Bus, which is synchronized with the CPU clock (100MHz),is the bus to be used for connection with the SDRAM Devices (IC5, Option RAM CN) and controls the devices directly. The PCI Bus, which is synchronized with the 1/4 CPU clock (25MHz), is the bus to be used for connection with the Mac & Phy (MediaAccess Controller & Physical Layer) device (IC6). The Block Diagram of CPU_ASIC(IC1) is as follows.
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KX-P7105 / KX-P7110
4.5.5.1.
CPU
The CPU is equipped with the "V850E1", which is a RISC type CPU that utilizes a five-stage pipeline technique. In addition, to increase the speed of multiplication processing, the CPU contains an on-chip high-speedhardware multiplier capable of executing 32-bit x 32-bit operations. The features of the CPU are as follows. 1. 100MHz 32bit RISC CPU core 2. Multiply-Accumulate hardware (32x32) and a barrel shifter (32bits/clock) 3. 5-stage pipeline 4. 8KB 2ways set associative instruction cache and 8KB 2ways set associative data cache 5. Includes INTC and DMAC (memory to memory transfer)
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KX-P7105 / KX-P7110
4.5.5.2.
SDRAM I/F
The CPU ASIC ( IC1 ) integrates a high-performance memory controller. The SDRAM I/F, which is the basic macro in CPU ASIC ( IC1 ) for controlling external SDRAM devices. The control signals of SDRAM devices are as follows.
SDMA [11:0]: SDDATA [15:0]: SDBA [1:0]: SDDQM [1:0]: SDCKE: SDWE: SDCAS: SDRAS: nSDCS [0]: nSDCS [1] SDCLK: These signals constitute the external SDRAM address bus. These signals constitute a bidirectional data bus for external SDRAM. These signals constitute the external SDRAM Bank address. These are the data mask output signals for external SDRAM. This is the clock enable output signal for external SDRAM. This is the data write enable output signal for external SDRAM. This is the column address strobe output signal for external SDRAM. This is the row address strobe output signal for external SDRAM. These are the chip select output signals for the standard SDRAM device. These are the chip select output signals for optional SDRAM devices. This is the synchronization clock output signal for external SDRAM.
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KX-P7105 / KX-P7110
4.5.5.3.
ROM I/F
The ROM I/F, which is the basic macro in CPU ASIC ( IC1 ) for controlling external memory devices ( Mask ROM, Flash ROM ). The control signals of ROM devices are as follows.
FRMA [21:0]: FRDATA [7:0]: nFRWE: nFROE: nFRCS0: FRCS1: These signals constitute the external ROM address bus. These signals constitute a bidirectional data bus for external ROM. This is the write strobe output signal for making external Flash ROM active. This is the output enable signal for Mask ROM or Flash ROM. This is the chip select output signal for standard the Mask ROM or the Flash ROM. This is the chip select output signal for optional the Mask ROM or the Flash ROM.
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KX-P7105 / KX-P7110
4.5.5.4.
EEPROM Control Circuit
This printer has 32kbit (KX-P7110) or 4kbit (KX-P7105) EEPROM ( IC7 ). EEPROM is saved the Page Count Data, Carribration Data, etc. The EEPROM control signals are explained as follows.
EEPCLK: EEPDATA: This is the serial data transfer clock. The bidirectional serial data/address signal is used to transfer all data into and out of the device.
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KX-P7105 / KX-P7110
4.5.5.5.
nPRDY: nTOP: nHSYNC: nPRINT: nVIDEO: nPURGE: nPSAVE: CXD: SXD: nCBSY: nSBSY: CCLK:
Internal Engine I/F (Main Board - Engine Board)
Engine status is ready for communication. A vertical synchronous signal which indicates the home position in a recording sheet. A horizontal synchronous signal which indicates the home position of horizontal laser scanning. After receiving this signal from main control CPU, the engine starts printing. In other words, print request. Video image data which modulate laser beam. Paper purge signal which asserted when the paper exit to the tray. Engine power save command signal. Serial command data from main board to engine board. Serial Status data from engine board to main board. Data transfer busy signal from main board to engine board. Data transfer busy signal from engine board to main board. Communication clock for those serial data. ( main board assert )
The communication I/F signal between Main Board and Engine Board in Main Board is as follows.
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KX-P7105 / KX-P7110
4.5.5.6.
Operation Panel Circuit
Panel LEDs and panel switch status are controlled by IC1.
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KX-P7105 / KX-P7110
4.5.5.7.
Parallel I/F
Data are received and transmitted by the IEEE1284 controller contained in IC1 between the host computer and the IEEE1284 I/F. The data and control lines used in conformance to the IEEE1284 standard are connected to the IC1 through the filter composed of a resistor and a capacitor, as shown in the figure below. A diode for surge protection and a Pull UP resistor are connected to each signal line. The voltage level between the IC1 and the connector is 5V. The data and the timing of the control lines in the compatible mode are shown as an example of a timing chart below.
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KX-P7105 / KX-P7110
4.5.5.8.
USB I/F
USB (Universal Serial Bus) I/F is composed of IC1 built-in USB Controller. The USB controller is a USB 1.1 compliant device controller, that supports Full-speed (12Mbps). This controller includes USB serial Interface engine, USB transceiver, FIFOs, control/status registers and Interface circuit for built-in CPU.Supported transfer modes are control transfer and bulk transfer. The connection of IC1 and USB connector (CN9) is shown below. USB data receive process is following. IC1 receives data from host and USB controller analyze an attribute of the data. If it is a control command, the controller sends corresponding data back. If it is a print data, it is stored in FIFO. Afterthat, USB controller reports CPU to receive a data with an interrupt. If the data is a print data, USB controller reads data from FIFO and transfers to system memory with internal DMA controller.
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KX-P7105 / KX-P7110
4.5.5.9.
PCI I/F
The CPU ASIC (IC1) integrates a PCI Bus interface. The PCI I/F is the basic macro in CPU ASIC (IC1) for controlling the Mac&Phy (IC6) that is a single-chip 10/100 Mb/s, via the PCI bus. The control signals of the PCI I/F are as follows.
PCIAD [31:0]: nPCICBE [3:0]: PCIREQ: PCIGNT: PCIFRM: PCIDSEL: PCIRDY: PCITRDY: nPCISTP: nPCIPERR: PCIPAR: nPCISERR: nPCIINT: PCIRST: PCICKOUT: These signals constitute the external Multiplexed address and data PCI bus. During the address phase these signals define the "bus command". During the data phase these pins indicate which byte lanes contain valid data. This signal indicates that the IC6 requests the ownership of the bus to the CPU ASIC (IC1). This signal indicates that the CPU ASIC (IC 1) grants ownership of the bus to the IC6. This signal indicates the beginning and duration of a bus transaction. This signal is the PCI Bus ID select signal. This signal indicates to be ready to complete the current data phase transaction. This signal indicates to be ready to complete the current data phase transaction. This signal indicates to request to stop the current transaction. This signal indicates a parity error. This signal indicates even parity across PCIAD[31-0] and nPCICBE[3-0]. This signal is asserted low during address parity errors and system errors. This signal is asserted low when an interrupt condition occurs. This signal is the PCI Bus Reset signal. This signal is the PCI Bus clock which provides timing for all bus phases.
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KX-P7105 / KX-P7110
4.5.5.10. Network I/F ( only for KX-P7110 )
The Network I/F is composed of the Mac&Phy (IC6) that is a single-chip 10/100 Mb/s Ethernet Controller. The Mac&Phy has a full featured physical layer device with integrated PMD (Physical Medium Dependent)sub-layers to support both 10BASE-T and 100BASE-TX Ethernet protocols. The control signals of the Network I/F are as follows.
TPRDM, TPRDP: Receive Data; Differential common input buffer. This differential common input can be configured to accept either 100BASE-TX or 10BASE-T signaling. Transmit Data; Differential common output driver. This differential common output is configurable to either 10BASE-T or 100BASETxsignaling.
TPTDM, TPTDP:
5 Schematic Diagram
Individual circuit diagrams are used in this section for ease of explanation. When a signal or circuit involves more than one diagram, a code number provides easy location of the continued circuit. This number indicatesthe schematic number and location coordinates, as shown in the following examples:
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KX-P7105 / KX-P7110
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KX-P7105 / KX-P7110
5.1.
Main Control Board
A B C D E F
TP +3.3V 10k 10k 002:B2 FRMA[21-0] 007:E5 IC1 N18 M19 K19 L20 J20 H20 G20 F20 G19 H19 H18 K18 K17 L18 K20 M17 P17 R18 M18 N20 N19 P18 Y20 Y19 W20 V20 V19 U20 T19 R20 R19 T18 U19 V18 V17 W18 W17 Y18 P20 nSDCS1 nSDCS0 SDBA1 SDBA0 SDMA0 SDMA1 SDMA2 SDMA3 SDMA4 SDMA5 SDMA6 SDMA7 SDMA8 SDMA9 SDMA10 SDMA11 SDDQM0 SDDQM1 SDCKE SDRAS SDCAS SDWE SDDATA0 SDDATA1 SDDATA2 SDDATA3 SDDATA4 SDDATA5 SDDATA6 SDDATA7 SDDATA8 SDDATA9 SDDATA10 SDDATA11 SDDATA12 SDDATA13 SDDATA14 SDDATA15 SDCLK FRMA0 FRMA1 FRMA2 FRMA3 FRMA4 FRMA5 FRMA6 FRMA7 FRMA8 FRMA9 FRMA10 FRMA11 FRMA12 FRMA13 FRMA14 FRMA15 FRMA16 FRMA17 FRMA18 FRMA19 FRMA20 FRMA21 nFRWE nFROE FRDATA0 FRDATA1 FRDATA2 FRDATA3 FRDATA4 FRDATA5 FRDATA6 FRDATA7 A14 B14 C14 A15 B15 C15 B16 C16 B17 A18 D14 B18 C17 A17 B20 B19 A19 C20 D18 A20 E19 C19 D12 A13 C18 G17 D20 E18 G18 E20 F18 D19 R42 R43 R44 R45 R46 R47 R48 R49 R50 R51 R52 R53 R54 R55 R56 R57 R58 R59 R60 R61 R62 R63 R64 R65 R66 R67 R68 R69 R70 R71 R72 R73 FRMA[0] FRMA[1] FRMA[2] FRMA[3] FRMA[4] FRMA[5] FRMA[6] FRMA[7] FRMA[8] FRMA[9] FRMA[10] FRMA[11] FRMA[12] FRMA[13] FRMA[14] FRMA[15] FRMA[16] FRMA[17] FRMA[18] FRMA[19] FRMA[20] FRMA[21] FRDATA[0] FRDATA[1] FRDATA[2] FRDATA[3] FRDATA[4] FRDATA[5] FRDATA[6] FRDATA[7] EEPCLK EEPDATA nFRCS1 nFRCS0 DCK DRSTZ DMS DDI DDO 006:B2 006:B2 002:B5 002:B4 007:F3 007:F3 007:F3 007:F3 007:F3 10p C100 L10 10p Not Used 007:E5 007:E5 007:E5 TCK IC1 TDI TDO TMS 10k R40 R41 G3 H3 T2 R3 U1 NC2 NC3 MODE TMC1 TMC2 nPURGE nPSAVE nPRINT CCLK CXD SXD CBSY SBSY nPRDY nTOP PPRDY VIDEO HSYNC U11 W14 V13 U12 Y13 V9 Y14 Y8 Y12 U9 W12 W13 W9 nPURGE nPSAVE nPRINT CCLK CXD SXD nCBSY nSBSY nPRDY nTOP PPRDY nVIDEO nHSYNC 006:E2 006:E3 006:E3 006:E3 006:E3 006:E3 006:E3 006:E2 006:E3 006:E2 006:E3 006:E2 006:E2 Not Used TP5 nTRST R287 33 50MHz 4 3 VDD OUT CONT GND 1 2
G
+3.3V
H
IC99 +3.3V C209 0.1u
1
SDMA[11-0] 003:B2
003:B5 003:B3 003:B4 003:B4 SDMA[0] SDMA[1] SDMA[2] SDMA[3] SDMA[4] SDMA[5] SDMA[6] SDMA[7] SDMA[8] SDMA[9] SDMA[10] SDMA[11]
R3 33 R4 33 R5 33 R6 33 R7 33 R8 33 R9 33 R10 33 R11 R12 R13 R14 R15 R16 R17 R18 R19 33 10 10 R33 10 R34 10 R35 10 R36 10 R37 10 R38 10 R39 L33 R20 33 R31 R32 R30 R29 R28 R27 R26 R25 R24 R23
33 33 33 33 33 33 33 33 33 33 10 10 10 10 10 10 10 10
R228
10p 10p C2 C99 L9 +3.3V 10k 10k 10p
6.8k
R231 0 C97 3p
X1
R222
nSDCS[1] nSDCS[0] SDBA[1] SDBA[0]
R1 33 R2 33 R22 R21 33
SDDATA[15-0]
R74
R75
2
003:B3
003:B3 SDDQM[0] 003:B5 SDDQM[1] 003:B4 SDCKE 003:B3 SDRAS 003:B3 SDCAS 003:B3 SDWE SDDATA[0] SDDATA[1] SDDATA[2] SDDATA[3] SDDATA[4] SDDATA[5] SDDATA[6] SDDATA[7] SDDATA[8] SDDATA[9] SDDATA[10] SDDATA[11] SDDATA[12] SDDATA[13] SDDATA[14] SDDATA[15] SDCLK 003:B4
33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33
C1
50.0MHz
1
W10 V10 Y11 W11 Y10
1
M2 M1 F1 G2 A12 B12 Y4 Y1
TCK nTRST TDI TDO TMS
nFRWE nFROE
nFRWE 002:B4 nFROE 002:B4
CLK50IN CLK50OUT CLK48IN CLK48OUT CLK54IN CLK54OUT SYSRST nEETCS
nKEY nDRMLED nRDYRED nERRLED PIFDATA0 PIFDATA1 PIFDATA2 PIFDATA3 PIFDATA4 PIFDATA5 PIFDATA6 PIFDATA7 PIFPERR nPIFACK nPIFBSY PIFSEL nPIFAFD nPIFINIT nPIFSLIN nPIFSTB nPIFFLT PIFDIR PIFHD
V14 U14 Y16 V15 V7 W7 Y7 V8 V6 W6 Y6 Y3 U7 V4 W4 W3 W5 V5 Y5 W8 Y2 Y15 V11 10k
KEY DRMLED RDYL