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CONTENTS
1 CONFIGURATION OF THE PRINTER ...................................................... C-1 1-1. General Description of Each Section ................................................ C-2 (1) Paper Feed Section ................................................................... C-2 (2) Print Head Unit (Exposure Section) ........................................... C-2 (3) Imaging Cartridge ....................................................................... C-2 (4) Transfer Section ......................................................................... C-2 (5) Fusing Section ........................................................................... C-2 (6) Paper Exit Section ...................................................................... C-2 1-2. General Flow for Printing Process .................................................... C-3 2 PAPER FEED SECTION ........................................................................... C-4
2-1. Tray 1 (1st Paper Cassette) .............................................................. C-4 (1) 1st Cassette Set Sensor (PC6) .................................................. C-5 (2) 1st Cassette Paper Empty Sensor (PC4) ................................... C-5 (3) 1st Cassette Paper Near Empty Sensor (PC5) .......................... C-6 (4) Double Feed Sensor .................................................................. C-6 (5) Synchronizing Roller Sensor (PC2) ........................................... C-7 (6) 1st Cassette Paper Size Detection ............................................ C-7 2-2. Tray 2 (2nd Paper Cassette) ............................................................ C-8 (1) 2nd Cassette Set Switch (SW3) ................................................. C-9 (2) 2nd Cassette Paper Empty Sensor (PC22) ............................... C-9 (3) 2nd Cassette Paper Near Empty Sensor (PC25) ....................... C-9 (4) 2nd Cassette Side Door Detecting Sensor (PC23) .................... C-10 (5) 2nd Cassette Paper Size Detection ........................................... C-10 2-3. Paper Feed ....................................................................................... C-11 (1) Registration Compensation ........................................................ C-11 (2) Paper Feeding ............................................................................ C-11 3 4 PRINT HEAD UNIT (EXPOSURE SECTION) MAGING CARTRIDGE ........................................... C-12
.............................................................................. C-13
4-1. Parts Names and Functions of the Imaging Cartridge ...................... C-13 4-2. Charging Section .............................................................................. C-14 4-3. Development Section ........................................................................ C-14 5 6 7 8 9 TRANSFER SECTION FUSING SECTION .............................................................................. C-15
.................................................................................... C-16 ............................................................................. C-18 .................................... C-19
PAPER EXIT SECTION
DETECTION OF A NEW IMAGING CARTRIDGE RIGHT DOOR INTERLOCK SWITCH (S2)
............................................... C-19
10 PRINT SEQUENCE
................................................................................... C-20 ............................................................................ C-22
11 PARALLEL INTERFACE
i
11-1. Connector pin assignments (Standard Centronics and IEEE1284-Type B) ................................... C-22 11-2. Compatibility mode handshake timing values ................................... C-22
ii
FrameMaker Ver.5.1(PC) SP-411 A: PRODUCT INSTALLATION 98.07.17
A: PRODUCT INSTALLATION
FrameMaker Ver.5.1(PC) SP-411 A: PRODUCT INSTALLATION 98.07.17
1
1-1.
PRECAUTIONS FOR INSTALLATION
Installation Site
When installing the printer, please avoid the types of locations listed below, both for safety conditions and to breakdowns. · · · · · · · · · Which is exposed to direct sunlight. Which is damp or dusty. Where it may be splashed with water. Which is tilted or subject to undue vibration. Where it will be subject to extremely high or low temperature or humidity. Where it will be subject to sudden fluctuations in either temperature or humidity. Which is near volatile flammables or corrosive gas. Which is in the direct air stream of an air conditioner, heater, or ventilator. Which is near a TV set or radio.
1-2.
Environmental Requirements
In order to make sure the printer function s in good condition, please make sure ambient environment satisfies the following requirements: Temperature Humidity Altitude : 10 to 35°C : 15 to 85% RH : 0 to 2500m Temperature fluctuation Humidity fluctuation Atmospheric pressure : ±10°C per hour or less : ±20% RH per hour or less : 760 hPa or more
1-3.
Power Requirements
Do not plug the Power cord into a power outlet via an extension cord supplying electricity to more than one unit. Power source Voltage fluctuation Frequency fluctuation 120-127V, 50-60Hz +6%, -10% ±3Hz 220-240V, 50-60Hz ±10%
When any other electric appliance is sourced from the same power outlet, make sure that the current capacity of the outlet is not exceeded. · Ensure that the power outlet is not hidden behind any object, allowing the user to immediately unplug the power cord when necessary. · The power-outlet shall be installed near the equipment and easily accessible. · The power cord should not be cracked or scratched.
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FrameMaker Ver.5.1(PC) SP-411 A: PRODUCT INSTALLATION 98.07.17
2
2-1.
INSTALLATION
Connection
The following items should be connected before use. · Connect the Parallel Interface Cable. · Connect the Power Cord.
2-2.
Moving
Caution: The printer weighs approximately 30kg (2 pounds) without the Imaging Cartridge, paper and Options. Don't lift the printer by yourself. Have at least on other person assist you.
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FrameMaker Ver.5.1(PC) SP-411 A: PRODUCT INSTALLATION 98.07.17
2-3.
Note:
Space Requirement
The minimum space requirements for install of the printer are enclosed in a . To ensure easy operation, replacement of consumable, and maintenance service jobs, provide the following space for the installation of the printer.
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B: GENERAL INFORMATION
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1
SPECIFICATIONS
: Desktop Laser Beam Printer : Electrostatic dry powdered imaging system + Imaging Cartridge : Laser Diode + Polygon Mirror scanning : 600 dpi, smoothing (Fine-ART), photo tone mode : Single print Duplex print (option) : Single print Duplex print (option) : Multi print Duplex print (option) within 4 mm of paper edge within (TBD) mm of paper edge 10.5 sec./Letter C (C: crosswise) 18.6 sec./Letter C 25 sheets/min/Letter C 17.4 sheets/min/Letter C
Type Printing system Exposure system Print resolution Print image Printing time Multi printing time Paper
: · Tray 1/ Manual Unit (option) Ordinary plain paper (60 - 90 g/m2)/Recycled paper (60 - 90 g/m2), OHP, Letterhead, Label, Thick paper (91 - 163 g/m2), Envelop Tray 2 : Ordinary plain paper (60 - 90 g/m2)/ Recycled paper (60 - 90 g/m2) Tray 3 - 5 (option)/2500 Sheet LCC (option) : Ordinary plain paper (60 - 90 g/m2)/Recycled paper (60 - 90 g/m2) : · Tray 1/Manual Unit (option) A3, JIS B4, A4, JIS B5, A5, Letter, Legal 14, Ledger, Executive, Envelop (DL, Com-10, C5, B5), Custom size (92 - 297 mm (width), 140 - 432 mm (length)) Tray 2/ Tray 3 - 5 (option) A3, JIS B4, A4, JIS B5, A5, Letter, Legal 14, Ledger, Executive : 35 Agfa Intellifonts, 10 TrueType fonts : 6 way system Tray 1 (multi-purpose) (250 sheets) Tray 2 (500 Sheet Cassette) (No 250 Sheet Universal Cassette???) : Face down (500 sheets maximum/A4 C/Letter C) : Within 60 seconds (when power supplied at 23°C ) : 114.84 mm/second : Heat Roller fusing system : Rotating Charge Brush system : Fine Micro Toning system : Paper separator (+ comb electrode????) : Blade system : 535 mm(W) x 543 mm(D) x 428 mm(H) Options included: 590 mm(W) x 543 mm(D) x 808 mm(H) : Approximately 30 kg (without Imaging Cartridge (TBD) kg) : AC 120V 60Hz , AC 230V 50/60Hz : 1050W or less (rated operation??) (TBD)W or less on the average (printing) (TBD)W or less on the average (standby) 45W or less (low power) : Temperature Humidity 10 - 35°C 15 - 85% RH (without condensation)
Paper size
PCL built-in fonts Paper feeding system
Paper exit system Warm-up time System speed Fusing system Charging system Development Separating system Cleaning system Dimensions Weight Power supply Power consumption:
Atmosphere Acoustic noise Printer life Recommended prints per month?? Imaging Cartridge life
: 55 dB (A) or less (printing) 38 dB (A) or less (standby) : 500,000 prints (converted to A4 C or Letter C) or 5 years : 6,000 prints on the average : 15,000 prints or more/A4 C/Letter C (when the black-to-white ratio is 5% on multi prints)
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Controller CPU Memory Interface Display Panel Accessories : PowerPC603e 90MHz : DRAM 4MB, ROM 4MB, NVRAM 4KB : IEEE1284 (Compatible, Nibble, ECP) Connector type B (36 pin Centronics) (Automatic interface selection upon data reception if an optional Network Board is used.) : LCD 16 characters x 2 lines , 3 LEDs, 8 keys Supporting 8 languages : Power Cord (only North America??) : Imaging Cartridge : CD-ROM or FDs(s??) · Printer driver Windows3.1/Windows95/WindowsNT4.0 (PCL5e + XL) · Status monitor Windows95/WindowsNT4.0 · Fonts Agfa Font Manager with 96 fonts : Manual?? (for printer and driver, one copy each) : Manual Unit : Duplex Unit : Tray 3 - 5 250 Sheet Universal Cassette/500 Sheet Fixed Cassette : 2500 Sheet LCC (Large Capacity Cassette) : 5 Bin Main Bin (500 sheets) : Hard Disk Unit (2.5" EIDE??, 2.1GB) : Extend memory DRAM 96MB (SIMM x 3) : PostScript 3 · ROM-SIMM board x 1, 4MB 136 fonts · PostScript system Ver. 7.5 or greater, PPD file · MacOS · PS printer driver for Windows3.1 · PS printer driver Windows95 : Network Board 1 slot · Interface Ethernet 100/10 Base T, 10 Base2, TokenRing TCP/IP, IPX/SPX, AppleTalk · Protocol · Managing function?? Built-in Web server function which is possible to manage with Web browser, SNMP (IPX, IP) + printer MIB · Attached software IPX browser (Windows95), supporting Windows95 peer to peer
Options
Mac, AppleTalk, and TrueType are trademarks of Apple, Inc. Windows3.1, Windows95, and WindowsNT are registered trademarks of Microsoft Corporation. IPX/SPX is a registered trademark of Novel Corporation. PostScript is a registered trademark of Adobe System, Inc. Other company names or brand names are registered trademarks or trademarks of respective corporations.
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PARTS IDENTIFICATIONS
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3
CONTROL PANEL
3-1. Control panel 1 2 3 4 5 6 7
Data
Message On Line Proceed Tray 1 Paper Shift
Menu v w
Item v w
Select v w
Enter
Job Cancel
11
10
9
8
1. Data LED 2. Message LED 3. On Line LED 4. On Line key 5. Proceed key 6. Tray1 Paper key 7. Shift key
8. Enter/Job Cancel key 9. Select key 10. Item key 11. Menu key
(1) LED
LED On Line (Green??) Data (Green??) Message (Amber??) On On-line (ready) Off-line Off Flashing Being off-line
Print data in memory
No data in memory
· Receiving data · Processing data Restorable error (Paper empty, Memory error, etc.)
Fatal error (Engine error, etc.) (Service call)
No problem
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(2) Function of Keys
Key On Line Proceed Function : Changes the on-line/off-line condition. Acts as a stop key during in on-line. : · Commands the printer to continue printing for forcibly ejecting the paper when the printer goes to off-line because of occurrence of an error. · Commands the printer to print the data in memory in off-line if the Data LED is lit. (If On Line is pressed while the Data LED is lit, the LED stays lit in off-line.) : · Enters the Tray1 Paper Menu mode while in off-line. · Selects a Menu from the Tray1 Paper menu. : · Enters the Menu mode while in off-line. · Selects a Menu from the Menu mode. : · Selects an Item from the selected Menu. : · Selects an Option from the selected Item. · Selects an Option from the selected Tray1 Paper Menu. · Pressing the key continuously will cause the printer to move quickly through the Options. : · Sets up the Option being selected. · In off-line, pressing Enter/Job Cancel + Shift cancels a job being processed. Also, it clears the print data in memory if any. : · Pressing Shift + Menu selects a Menu in the Menu mode in the reverse order. · Pressing Shift + Item selects an Item in the Menu in the reverse order. · Pressing Shift + Select selects an Option in the reverse order.
Tray1 Paper
Menu
Item Select
Enter/Job Cancel
Shift
NOTE For the Service Mode for a serviceman, see E "Adjustment".
-----------------------------X-X.Service Mode (This should be moved to E "Adjustment", if this is not written in E yet.) The service mode is prepared for a serviceman.
(1) How To Enter the Service Mode
While pressing and holding On Line + Menu + Select, turn on the power of the printer. Keep press these keys for more than three seconds, then the following "SERVICE MENU" appears on the LCD.
SERVICE MENU TOTAL COUNT
Item
(2) How To Exit the Service Mode
Press the On Line to exit the Service mode. The initialization sequence is performed and the printer returns to normal condition.
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(3) Service Mode Tree
Menu SERVICE MENU Item TOTAL COUNT LARGE SIZE COUNT STAPLE COUNT 0000000 - 9999999 0000000 - 9999999 000000 - 999999 RESET COUNT 000000 - 999999 (??What display for "Limit"??) RESET COUNT -4.9, -4.2, -2.8, -2.1, -0.7, 0*, +0.7, +2.1, +2.8, +4.2, +4.9 mm -4.9, -4.2, -2.8, -2.1, -0.7, 0*, +0.7, +2.1, +2.8, +4.2, +4.9 mm -4.9, -4.2, -2.8, -2.1, -0.7, 0*, +0.7, +2.1, +2.8, +4.2, +4.9 mm PERMANENT OFF, ON* Option
I/C COUNT
LOOP ADJUST T2-5 LOOP ADJUST T1 [LOOP ADJUST DUP] SERVICE MESSAGE
*: Default setting [ ]: Displayed when the option is installed.
(4) Explanations for Items in the Service Mode
In the Service mode, you can display counter values or reset the counters. The counter value for I/C COUNT is stored in the EEPROM in the engine. Other counter values are stored in the EEPROM in the controller (controller board). TOTAL COUNT: The total number of printed sheets after delivery from the factory is displayed in 7 digits. You cannot clear this counter. LARGE SIZE COUNT: The total number of printed sheets for A3 and ledger after delivery from the factory is displayed in 7 digits. You cannot clear this counter. STAPLE COUNT: The number of times an optional stapler has been used is displayed in 6 digits. To reset the counter, select "RESET COUNT" with the Select key and press the Enter key. "RESET OK?" will be displayed on the LCD. Press the Enter key again to clear the counter. I/C COUNT: The number of times the PC drum in the imaging cartridge has been turned is displayed in 6 digits. To reset the counter, select "RESET COUNT" with the Select key and press the Enter key. "RESET OK?" will be displayed on the LCD. Press the Enter key again to clear the counter. LOOP ADJUST T2-5, LOOP ADJUST T1, [LOOP ADJUST DUP]: The loop value for tray 2 - 5, tray 1, and optional manual unit and duplex unit can be adjusted. The loop value set here will affect the registration compensation for paper (paper skew compensation). If registration is not correctly made, the loop value should be adjusted to correct it. (For registration compensation, see 2-3 "Paper Feed" in C "MECHANICAL/ELECTRICAL".) SERVICE MESSAGE: In the default setting ("ON"), the Maintenance Menu will be displayed normally. If "PERMANENT OFF" is set, no items and no "MAINTENANCE REQ#" will be displayed even if the Maintenance Menu is selected.
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3-2. Condition Messages
Message
READY TRAY1EMPTY
Warning message
Messages
READY OFF LINE PROCESSING PRINTING COPYING CANCELING JOB
: Awaiting data : Off-line : Image processing for data received through the parallel port : Printing data : Feeding paper with the engine : Canceling job After canceling, the printer goes to on-line.
Menu modes TRAY1 PAPER MENU PRINT MENU PCL MENU SYSTEM MENU MAINTENANCE MENU ADJUST MENU PARALLEL MENU [NETWORK MENU] TEST PRINT MENU WARMING UP SELF TEST FORMATTING HDD CLEANING POWER SAVE CONTEXT SAVE : Printer warming up : Power-on self-check : Formatting the hard disk (option) : Engine cleaning : Power saving mode : Context saving
[ ]: Displayed when the option is installed. Warning messages (Please see the instruction manual?)
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3-3. Caution Messages
DATA COMPRESSION
Caution message (Please see the instruction manual?)
3-4. Auto-continuable Messages
MEMORY OVERFLOW
Auto-continuable message (Please see the instruction manual?)
3-5. Operator Call Messages
NO PAPER
Operator call message (Please see the instruction manual?)
3-6. Serviceman Call Messages
FATAL ERROR1 ROM
Serviceman call message (Please see the instruction manual?)
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3-7. Key Condition Diagram
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4
COMPONENT LAYOUT
2
3
4
5
6
8
1
9 10 11 12 13 14 15
23
16
22
21
20 19
18
17
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23.
Print Head Unit (PU) Toner Empty Detecting Board (PWB-G) Imaging Cartridge Sleeve Roller Charge Brush Paper Exit Roller Paper Exit Sensor (PC3) Lower Fusing Roller Upper Fusing Roller (Fusing Roller Heater Lamp (H1) is incorporated.) PC Drum Transfer Roller Synchronizing Roller Synchronizing Roller Sensor (PC2) Double Feed Detecting Sensor Board (PWB-H) 2nd Cassette Transport Roller 2nd Cassette Paper Take-up Roller 2nd Cassette Paper Empty Sensor (PC22) 2nd Cassette Paper Take-up Solenoid (SL21) 1st Cassette Paper Take-up Roller 1st Cassette Paper Take-up Solenoid (SL1) 1st Cassette Paper Empty Sensor (PC4) 2nd Paper Cassette 1st Paper Cassette
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5
GEAR/ROLLER ASSIGNMENT
The locations of the gears and rollers in the printer is shown below. The transport motor (M2) transmits the power to the paper driving parts for feeding paper. Meanwhile, the I/C drive motor (M1) transmits the power to the driving parts in the imaging cartridge.
I/C Drive Motor (M1)
Transport Motor (M2)
4108 (SP411) KUDOUBUHIN LAYOUT
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6
ELECTRICAL COMPONENT LAYOUT
PWB-R1 TH1
PC3 S2
M1 PWB-NT * PWB-L SL21 PC5
TF1
M2 TS1 SL1 CL2 CL1 PC6 PWB-P SW3 PC22 PWB-R2 PWB-H PC2 PC25 PC4 PC23 M3
H1
M4
SIMM *
PWB-A PWB-A1 PH HDD * PU1 S1 PWB-OP
PWB-G
PWB-S1 PWB-S2
HV1
4108 (SP411)
ELECTORICAL
LAYO
PU PU1 HV1 PWB-A PWB-A2 PWB-G PWB-H PWB-L PWB-OP PWB-P PWB-R1 PWB-R2 PWB-S1 PWB-S2 M1 M2 M3 M4 SL1
: Print Head Unit : Power Supply Unit : High Voltage Unit : Main Board : 2nd Cassette Main Board : Toner Empty Detecting Board : Double Feed Detecting Sensor Board : PPM Switching Board : Control Panel : Controller Board : Fuser Frame Resistor Board : Pre-Transfer Guide Plate Resistor Board : 1st Cassette Paper Size detecting Board : 2nd Cassette Paper Size detecting Board : I/C Drive Motor : Transport Motor : Cooling Fan Motor : Power Unit Cooling Fan Motor : 1st Cassette Paper Take-up Solenoid
SL21 CL1 CL2 S1 S2 SW3 PC2 PC3 PC4 PC5 PC6 PC22 PC23 PC25 H1 TF1 TH1 TS1
: 2nd Cassette Paper Take-up Solenoid : Synchronizing Clutch : Transport Clutch : Power Switch : Right Door Interlock Switch : 2nd Cassette Set Switch : Synchronizing Roller Sensor : Paper Exit Sensor : 1st Cassette Paper Empty Sensor : 1st Cassette Paper Near Empty Sensor : 1st Cassette Set Sensor : 2nd Cassette Paper Empty Sensor : 2nd Cassette Side Door Detecting Sensor : 2nd Cassette Paper Near Empty Sensor : Fusing Roller Heater Lamp : Fusing Roller Heater Lamp Fuse : Fusing Roller Thermistor : Fusing Roller Thermostat
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CONNECTOR LAYOUT
3p 4p
3p (PC)
2p (CL) 9p 4p 13p 10p 6p 2p (SL) 3p (PC) 2p (CL) 3p (PC) 2p 3p (PC) 3p (PC) 3p (PC) 3p (fan) 3p (PC)
14p
3p (PC)
2p
14p
2p
4108 (SP411) CONNECTOR LAYOUT
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8
SWITCH/SENSOR IDENTIFICATION
Printer main body
Symbol S1 S2
Name Power Switch Right Door Interlock Switch Synchronizing Roller Sensor Paper Exit Sensor 1st Cassette Paper Empty Sensor 1st Cassette Paper Near Empty Sensor 1st Cassette Set Sensor Turns power on and off.
Function
Detects open/close condition of the right door. When it is closed, the switch is ON. Detects the paper fed from the tray. Active: "L".
PC2
PC3 PC4
Detects paper ejection from the printer. Active: "L" Detects paper empty condition of the 1st paper cassette. Active: "H" Detects paper near empty condition of the 1st paper cassette. Active: "L" Detects that the 1st paper cassette is installed in the tray 1. Active: "H" Detects that the 2nd paper cassette is installed in the tray 2. Switch is turned ON when the cassette is installed. Also detects the type of cassette; 250 sheet universal cassette or 500 sheet fixed cassette. Detects the possibility of double feeding on the 1st paper cassette. Active: "L" (Detects whether the leading edge of the paper to be taken up next runs 10 mm or more from the nip point.) The sensor is on the double feed sensor board (PWB-H) Detects toner empty condition. Active: "L" The sensor is on the toner empty detecting board (PWB-G). Detects the temperature of the upper fusing roller.
PC5
PC6
SW3
2nd Cassette Set Switch
-
Double Feed Sensor
-
Toner Empty Sensor
TH1
Fusing Roller Thermistor Fusing Roller Thermostat Fusing Roller Heater Lamp Fuse
TS1
Shuts off the application voltage to the fusing roller heater lamp (H1) when temperature becomes abnormal. Blows own fuse immediately to shut off the application voltage to the fusing roller heater lamp (H1) when temperature rises abnormally.
TF1
2nd Paper Cassette
Symbol PC22
Name 2nd Cassette Paper Empty Sensor 2nd Cassette Paper Near Empty Sensor 2nd Cassette Side Door Detecting Sensor
Function Detects paper empty condition of the 2nd paper cassette. Active: "L" Detects paper near empty condition of the 2nd paper cassette. Active: "L" Detects open/close condition of the 2nd cassette side door. When it is opened, the sensor output is "H".
PC25
PC23
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9
ELECTRICAL SERVICE PARTS ON P.W. BOARDS
PWB-A
PJ10 (2P) PJ9 (6P) PJ8 (5P) F2 IC9 PJ12 (7P) IC19 IC10 PJ7 (3P) F1 PJ6 (2P) PJ5 (9P) PJ3 (13P) PJ4 (20P) PJ2 (4P) PJ1 (32P) IC13 IC6 IC7 IC1 IC20 IC18 IC3 IC15 PJ21 (3P)
PJ13 (26P)
PJ14 (28P) IC16 PJ16 (12P)
IC14
VR1
PWB-P
CN1 (32P) CN2 (20P) SIMM1, 2 (ROM) SIMM3, 4, 5 (RAM)
CN3 (44P)
CN4 (50P)
CN5 (36P)
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HV1
VR2
VR1 CN9 (6P) CN1 (4P)
C
VR51 VR71
B
BL
SS
T2
T1
PU1
F2 F15A ST4 ST3 F1 PJ1 10A (3P) PJ4 (5P)
PJ2 (2P)
PJ5 (12P)
Network Card (Option)
P12 (25P) J2A (8P)
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10
SYSTEM LAYOUT
10-1.Drive Section
The parts that control the driving system are shown below. They are motors, solenoids, clutches, rollers, and sensors.
Main Board Main Board (PWB-A) (PWB-A)
· Right Door Interlock Switch (S2) · Right Door Interlock Switch (S2) · 1st Cassette Paper Size Slection Dial · 1st Cassette Paper Size Slection Dial (PWB-S1) (PWB-S1) Cassette Paper Size Slection Dial · · 2nd Cassette Paper Size Slection Dial (PWB-S2) (PWB-S2) · Toner Empty Sensor (PWB-G) · Toner Empty Sensor (PWB-G)
1st Cassette Paper Take1st Cassette Paper Takeup Solenoid (SL1) up Solenoid (SL1)
1st Cassette Paper 1st Cassette Paper Take-up Roller
· 1st Cassette Paper Empty Sensor (PC4) · 1st CassettePaper Empty Sensor (PC4) · 1st Cassette Paper Near Empty Sensor · 1st CassettePaper Near Empty Sensor (PC5) · 1st CassetteSet Sensor (PC6) · 1st Cassette Set Sensor (PC6) ··2nd Cassette Paper Empty Sensor (PC22) 2nd Cassette Paper Empty Sensor (PC22) ··2nd Cassette Paper Near Empty Sensor 2nd Cassette Paper Near Empty Sensor (PC25) (PC25) 2nd Cassette Side Door Detecting Sensor ··2nd Cassette Side Door Detecting Sensor (PC23) (PC23) 2nd Cassette Set Switch (SW3) ··2nd Cassette Set Switch (SW3) Synchronizing Roller Sensor (PC2) Sensor (PC2)
· Transport Clutch (CL2) (CL2) · Cassette Paper · · 2nd Cassette Paper Take-up Solenoid (SL21) Take-up Solenoid (SL21)
· 2nd Cassette Paper · 2nd CassettePaper Roller Take-up Roller · 2nd Cassette · 2nd Cassette Transport Roller Transport Roller
Synchronizing Synchronizing Clutch (CL1) (CL1)
Synchronizing Synchronizing Roller Roller
Transport Motor (M2) (M2)
··Upper Fusing Upper Fusing Roller Roller Paper Exit Roller ··Paper Exit Roller
· Charge Brush · · Sleeve Roller · Sleeve Roller
Paper Exit Sensor (PC3) Paper Exit Sensor (PC3)
I/C Drive Motor Drive Motor (M1) (M1)
· PC Drum · PC Drum · Transfer Roller · Transfer Roller
Polygon Motor Polygon Motor
Polygon Mirror Polygon Mirror
· SOS Sensor · SOS Sensor · Laser Diode Current Power · Control Control Thermistor (TH1) (TH1) Thermostat (TS1) Thermostat (TS1) Heater Lamp Fuse (TF1) Heater Lamp Fuse (TF1) · Current monitoring · Current Monitoring · Current monitoring · Current monitoring
Fusing Roller Heater Fusing Roller Heater Lamp (H1) Lamp (H1)
Fusing Upper Fusing Roller Roller
Cooling Motor (M3) Cooling Fan Motor (M3) Power Unit Cooling Fan Motor (M4) Power Unit Cooling Fan Motor (M4)
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10-2.Electrical Section
The power supply system and the signal lines are shown below.
ControlPanel (PWB-OP) Control Panel (PWB-OP)
Controller Controller
PPM Switching Board PPM Switching Board (PWB-L) (PWB-L)
2nd Paper Size Detecting 2nd Paper Size Detecting Board (PWB-S2) Board (PWB-S2) 1st Paper Size Detecting 1st Paper Size Detecting Board (PWB-S1) Board (PWB-S1)
2nd Cassette Main Board 2nd Cassette Main Board (PWB=A2) (PWB-A2)
Toner Empty Detecting TonerEmpty Detecting Board (PWB-G) Board(PWB-G) Double Feed Detecting DoubleFeed Detecting Sensor Board (PWB-H) Sensor Board (PWB-H) 5V 5V
Control Board (PWB-P) Control Board (PWB-P) RAM RAM ROM ROM EEPROM EEPROM
Video Video PC PC Parallel I/F ParallelI/F 5V 5V 5V, 24V 5V, 24V
MainBoard Main Board (PWB-A) (PWB-A)
[Network I/F] [Network I/F] [SIMM] [SIMM] [ROM-SIMM] [ROM-SIMM] [Hard Disk] [Hard Disk]
Heater Lamp Control Heater Lamp Control
5V, 24V 5V, 24V
Print Head Unit Print Head Unit
Imaging Cartridge Imaging Cartridge
Control Control
5V, 24V 5V, 24V
High Voltage High Voltage High Voltage High Voltage Unit (HV1) Unit (HV1)
Power Supply Unit Power Supply Unit (PU1)
AC Fusing Roller Heater Lamp AC Fusing Roller Heater Lamp Thermostat Thermostat Heater Lamp Fuse Heater Lamp Fuse AC AC Pre-Transfer Guide Plate Pre-Transfer Guide Plate Resistor Board (PWB-R2) Resistor Board (PWB-R2)
Sensors Sensor Motors Motors Solenoides Solenoides Cluches Cluches Fans Fans Thermistor Thermistor
1st Paper Cassette 1st Paper Cassette
2nd 2nd Paper Cassette Cassette
Signal line Signal line Power line Power line
(Other model?)
· The power supply unit supplies DC +5 V and DC +24 V to the main board. It also supply an AC voltage to the heater lamp. · The controller receives a compressed print data from the host PC through an interface. In the parallel interface, the printer status is returned to the host PC in the IEEE1284 nibble mode. · The controller adjusts the size and position of the print data to generate image data. The image data is sent to the print head unit via the main board for printing. · The main board controls the various parts of the engine including the paper take-up section, charging section, development section, transfer section, fusing section, and paper exit section.
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SEQUENCE FLOW
To carry out printing cycles, signals are transferred among the controller, main control and engine as shown below.
Host PC
Controller Interface IEEE1284, [Network]
Main Control
Initialize Command Processor Language detection Job control Error check Image Processing Paper size, Copies Font expansion Fine Art Real tone Toner control -PRRDY Warm-up Detecting JAM, ErStandby
-CPRDY
-PRINT
Feeding
-H. SYNC Image Memory -VIDEO
Charging Exposure Development
Transfer Fusing Exit
Duplex print? Yes
No
PRINT
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C: MECHANICAL/ELECTRICAL
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1
CONFIGURATION OF THE PRINTER
The following diagram shows the major parts of the printer and the paper path in the printer. The printer consists of the paper feed section, print head unit (exposure section), imaging cartridge (charging section and development section), transfer section, fusing section, and paper exit section.
Paper Exit Roller
Paper Exit
Paper Exit Sensor (PC3)
Fusing Lower Fusing Roller Imaging Cartridge Print Head Unit Lase Beam Charging PC Drum Charge Brush Sleeve Roller Exposure Development Synchronizing Roller Synchronizing Roller Sensor (PC2) Upper Fusing Roller (Heater Lamp) Transfer Roller Transfer
Toner Empty Sensor 1st Cassette Paper Empty Sensor (PC4) 1st Cassette Paper Near Empty Sensor (PC5) Feeding Tray 1 (1st Paper Cassette) 2nd Cassette Paper Empty Sensor (PC22) 2nd Cassette Paper Near Empty Sensor (PC25) Double Feed Sensor
Manual Unit (Option)
Tray 2 (2nd Paper Cassette)
: Indicates the sensor.
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1-1. General Description of Each Section (1) Paper Feed Section
Paper is fed from either the tray 1 (1st paper cassette) or tray 2 (2nd paper cassette). When the printer receives a print command, the paper take-up solenoid turns ON and a sheet of paper is fed by the paper take-up roller in the 1st paper cassette. The synchronizing roller sensor (PC2) detects the fed paper and the paper is fed to the synchronizing roller for printing. Optional cassettes: When optional trays (tray 3 to 5), LCC, or manual unit is installed, paper can be fed from respective paper sources.
(2) Print Head Unit (Exposure Section)
The laser diode in the print head unit emits a laser beam corresponding to the print data. The laser beam falls on the rotating heptagonal polygon mirror to produce a scanning beam, producing an electrostatic latent image on the surface of the PC drum in the imaging cartridge.
(3) Imaging Cartridge
The imaging cartridge consists of the charging section and development section. The moving parts of the imaging cartridge are driven by the I/C drive motor (M1). In the development section, toner is fed to the electrostatic latent image formed on the surface of the PC drum to produce a visible toner image on the PC drum.
(4) Transfer Section
The transfer section transfers the toner image on the surface of the PC drum onto the paper.
(5) Fusing Section
Using a heated roller, the fusing section permanently fixes the toner image onto the paper. The fusing temperature is controlled by using a heat sensitive element (thermistor) attached to the upper fusing roller.
(6) Paper Exit Section
The paper which has passed the fusing section is ejected to the top of the printer with the paper exit roller. The paper exit sensor (PC3) senses the ejection of the paper. When the optional manual unit and optional duplex unit are installed: For duplex printing, the trailing edge of the printed paper is drawn inside the duplex unit by the switch back motor in the duplex unit. Then, the paper is fed to the manual unit by the transport motor in the duplex unit and waits for the 2nd print command.
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1-2. General Flow for Printing Process
The following shows the general printing process flow. Note: For detailed printing sequence, see 10 "Printing Sequence".
Print Command The polygon motor in the print head unit starts turning. Polygon motor ON · Charge bias, developer bias, seal bias and transfer bias voltages are applied. · The I/C (Imaging Cartridge) drive motor (M1) starts turning.
Starting processing
Paper take-up
· The transport motor (M2) starts turning. · The paper take-up solenoid turns ON to feed paper.
Laser emission
A laser beam is emitted at constant power.
· Scanning the image data · Paper feeding
· A laser beam is scanned on the surface of the PC drum to produce an electrostatic latent image. · Upon the synchronizing roller sensor (PC2) detects the presence of paper, the synchronizing clutch turns ON to turn the synchronizing roller for feeding paper.
Developing the image data
Toner is applied to the PC drum to produce a visible toner image. The toner image on the surface of the PC drum is transferred onto the paper. The toner is permanently fixed onto the paper.
Transfer the image data
Fusing the toner
Paper ejection
The paper is ejected.
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PAPER FEED SECTION
2-1. Tray 1 (1st Paper Cassette) 2-1-1. Taking up Paper
The power is transmitted from the transport motor (M2) as follows to take up paper from the 1st paper cassette. 1 The transport motor (M2) turns counterclockwise 2 The idle gear turns clockwise. The 1st cassette paper take-up solenoid (SL1) turns ON. 3 The paper take-up roller turns counterclockwise. Paper is taken up. Note: The rotational direction is the one viewing from the front of the printer. Double feed of paper in the 1st paper cassette is prevented by the friction produced with the separator pad. PC Drum Transfer Roller
Synchronizing Roller
1
Transport Motor (M2)
Paper Take-up Roller
2 3
Paper Synchronizing Roller Sensor (PC2)
1st Cassette Paper Take-up Solenoid (SL1)
Separator Pad
Synchronizing Roller Sensor (PC2)
1st Cassette Set Sensor (PC6) 1st Cassette Paper Near Empty Sensor (PC5)
Double Feed Sensor Paper Take-up Roller
1st Cassette Paper Empty Sensor (PC4)
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2-1-2. Sensors for Tray 1 (1) 1st Cassette Set Sensor (PC6)
This sensor detects the installation of the 1st paper cassette in the tray 1. This sensor uses a photointerrupter. If the 1st paper cassette is not installed in the tray 1, the projection of the paper cassette comes off the sensor which is mounted on the printer. In this case, the light emitted from the LED of the photointerrupter reaches the phototransistor of the photointerrupter and the phototransistor turns ON. Accordingly, the output of the phototransistor, i.e., the output of the sensor is "L". When the 1st paper cassette is installed in the tray 1, the projection of the paper cassette engages with the sensor. In this case, the light emitted from the LED is blocked by the projecting and it does not reach the phototransistor. As a result, the phototransistor turns OFF and its output is "H". The CPU on the main board can know whether the 1st paper cassette is installed in the tray 1 or not by sensing the output from the sensor (PC6). 1st Cassette Set Sensor (PC6) 1st Paper Cassette Light passes: Output = L PC6 is mounted on the Printer. [Cassette is not installed.] Photointerrupter Circuit OUT Photo Transistor LED Photointerrupter When light passes: When light is blocked: [Main Board] OUT = L OUT = H [Cassette is not installed.] Light is blocked: Output = H
(2) 1st Cassette Paper Empty Sensor (PC4)
This sensor detects the paper empty status of the 1st paper cassette. The sensor uses a photointerrupter. When paper runs out in the 1st paper cassette, paper empty occurs. When paper is present in the paper cassette, the lower part of the sensor arm is pressed by the paper and the projection of the upper part of the sensor arm comes off the photointerrupter. Thus, the light from the LED of the photointerrupter passes in the photointerrupter and the photointerrupter turns ON. As a result, the output of the photointerrupter is "L". When paper runs out in the paper cassette, the lower part of the sensor arm lowers with its weight so that the projection of the sensor arm engages with the photointerrupter. Thus, the light from the LED is blocked by the projection and the photointerrupter turns OFF. As a result, the output of the photointerrupter is "H". 1st Cassette Paper Empty Sensor (PC4) Light passes: Output = L
Paper
Light is blocked: Output = H
[Paper is present.]
[Paper empty]
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(3) 1st Cassette Paper Near Empty Sensor (PC5)
This sensor detects the paper near empty status of the 1st cassette paper. The sensor uses a photointerrupter. As the sheets of paper in the paper cassette decrease, the paper lifting plate in the paper cassette lifts. When the paper lifting plate lifts exceeding a certain point, the 1st cassette paper near empty occurs. When enough paper is present in the paper cassette, the paper lifting plate is lowered. In this condition, the lower part of the sensor arm is engaged with the photointerrupter. Thus, the light from the LED of the photointerrupter is blocked by the sensor arm and the photointerrupter turns OFF. As a result, the output of the photointerrupter is "H". When the remainder of paper decreases, the upper part of the sensor arm is pressed by the paper lifting plate and the lower part of the sensor arm comes off the photointerrupter. Thus, the light from the LED passes in the photointerrupter and the photointerrupter turns ON. As a result, the output of the photointerrupter is "L". 1st Cassette Paper Near Empty Sensor (PC5)
Paper
Few paper
Light is blocked: Output = H
Paper Lifting Plate Paper Lifting Plate Light passes: Output = L [Paper near empty]
[Paper is present.]
(4) Double Feed Sensor
The double feed sensor is on the double feed detecting sensor board (PWB-H) and detects the possibility of double feed. This sensor uses a photo reflector. The double feed sensor detects whether the leading edge of paper to be taken up next runs 10 mm or more from the paper nip point. If paper runs 10 mm or more, double feeding may occur if the paper is taken up in the normal printing interval. To avoid this, the printer prolongs the printing intervals as long as the double feed sensor detects the double feed status. Thus, the number of sheets to be fed per minutes will be reduced. When the leading edge of the paper to be taken up next runs 10 mm or more, the light emitted from the LED of the double feed sensor is reflected by the paper. The reflected light is received by the light sensitive element of the sensor and the sensor output is "L". When the running is less than 10 mm, the light emitted from the LED is not reflected by the paper and the sensor output is "H".
Paper Take-up Roller
Paper
Double Feed Sensor Light reflects: Output = L Light does not reflect: Output = H
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(5) Synchronizing Roller Sensor (PC2)
This sensor detects that the paper is fed inside the printer. The sensor uses a photointerrupter. The output of the sensor is used as a reference for feeding paper inside the printer. This sensor will be activated when paper is fed from any paper source. Without paper, the sensor arm is pressed by a spring and the end of the sensor engages with the photointerrupter. Thus, the light from the LED of the photointerrupter is blocked and the photointerrupter turns OFF. As a result, the output of the photointerrupter is "H". On the other hand, when paper is taken up, the sensor arm is pushed by the paper and the end of the sensor arm comes off the photointerrupter. Thus, the light from the LED passes in the photointerrupter and the photointerrupter turns ON. As a result, the output of the photointerrupter is "L". Synchronzing Roller Sensor (PC2)
Light is blocked: Output = H [No paper]
Paper
Light passes: Output = L [Paper present]
(6) 1st Cassette Paper Size Detection
The paper size for the 1st paper cassette is set by the switch on the 1st cassette paper size detecting board (PWB-S1). The switch is a rotary encoder with four output lines. The output levels of the four output lines vary with the rotational angles of the switch. These four outputs are fed to the control circuit on the main board and decoded to detect the paper size being selected.
1st Cassette Paper Size Detecting Board (PWB-S1) Size 1 Size 2 Size 3 Size 4
Decoder
Paper size decoded signals
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2-2. Tray 2 (2nd Paper Cassette) 2-2-1. Taking up Paper
The power is transmitted from the transport motor (M2) as follows to take up paper from the 2nd paper cassette. 1 The transport motor (M2) turns counterclockwise 2 The idle gear turns clockwise. 3 The 1st cassette paper takeup gear turns counterclockwise. 4 The 1st cassette idle gear turns clockwise. The transport clutch (CL1) turns ON. Power is transmitted to the 2nd paper cassette. The 2nd cassette paper take-up solenoid (SL21) turns ON. 5 Paper Take-up Roller turns counterclockwise. Paper is taken up. 6 ~ 8 The gear train turns. 9 The transport gear turns counterclockwise. Paper is taken up. Paper is fed. Note: The rotational direction is the one viewing from the front of the printer. Double feed of paper in the 2nd paper cassette is prevented by the separators of the paper cassette. Separators PC Drum Transfer Roller
Synchronzing Roller
1
Transport Motor (M2)
2 3
Synchronizing Roller Sensor (PC2)
Transport Gear Transport clutch (CL1)
4 9
Paper Take-up Roller Paper
0
8 5 6
[2nd Paper Cassette]
7
2nd Cassette Paper Empty Sensor (PC22)
2nd Cassette Paper Near Empty Sensor (PC25)
Paper Take-up Roller 2nd Cassette Set Switch (SW3) 2nd Cassette Paper Take-up Solenoid (SL21)
2nd Cassette Side Door Detecting Sensor (PC23)
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2-2-2. Sensors for Tray 2 (1) 2nd Cassette Set Switch (SW3)
This switch detects whether the 2nd paper cassette is installed in the tray 2 or not. This switch also detects the paper cassette type; 250 sheet universal cassette or 500 sheet fixed cassette. If no paper cassette is installed on the tray 2, the switch is not pressed by the paper cassette. When the 250 sheet universal cassette is installed, the left side of the switch is pressed by the projection of the cassette. While the 500 sheet fixed cassette is installed, the right side switch is pressed by the projection of the cassette.
2nd Cassette Set Switch (SW3) Output=L/H (TBD) Mounted on the printer. Fixed Cassette
Universal Cassette
(2) 2nd Cassette Paper Empty Sensor (PC22)
This sensor detects the paper empty status of the 2nd paper cassette. The sensor uses a photointerrupter. When paper runs out in the 2nd paper cassette, paper empty occurs. When paper is present in the paper cassette, the sensor arm is pressed by the paper and it is lifted. So, the projection of the sensor arm engages with the photointerrupter. Thus, the light from the LED of the photointerrupter is blocked and the photointerrupter turns OFF. As a result, the output of the photointerrupter is "H". When paper runs out in the paper cassette, the sensor arm lowers by pressing a spring so that the projection of the sensor arm comes off the photointerrupter. Thus, the light from the LED passes in the photointerrupter and the photointerrupter turns ON. As a result, the output of the photointerrupter is "L".
2nd Cassette Paper Empty Sensor (PC22) Light is blocked: Output = H Light passes: Output = L
Paper [Paper is present.] [Paper empty]
(3) 2nd Cassette Paper Near Empty Sensor (PC25)
This sensor detects the paper near empty status of the 2nd cassette paper. The sensor uses a photointerrupter. As the sheets of paper in the paper cassette decrease, the paper lifting plate in the paper cassette lifts. When the paper lifting plate lifts exceeding a certain point, the 2nd cassette paper near empty occurs. When enough paper is present in the paper cassette, the paper lifting plate is lowered. In this condition, the projection of the sensor arm is engaged with the photointerrupter. Thus, the light from the LED of the photointerrupter is blocked by the projection and the photointerrupter turns OFF. As a result, the output of the photointerrupter is "H". When the remainder of paper decreases, the lower part of the sensor arm is pressed by the paper lifting plate and the projection of the sensor arm comes off the photointerrupter. Thus, the light from the LED passes in the photointerrupter and the photointerrupter turns ON. As a result, the output of the photointerrupter is "L".
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2nd Cassette Paper Near Empty Sensor (PC25) Light is blocked: Output = H Paper Few paper Paper Lifting Plate [Paper is present.] [Paper near empty] Light passes: Output = L
(4) 2nd Cassette Side Door Detecting Sensor (PC23)
This sensor detects whether the 2nd cassette side door is closed or not. The sensor uses a photointerrupter. The side door is normally closed except when removing jammed paper. When the side door is closed, the projection of the side door engages with the photointerrupter of the 2nd paper cassette. Since the light emitted from the LED of the photointerrupter is blocked by the projection, the photointerrupter turns OFF. Thus, the output of the photointerrupter is "H". When the side door is opened, the projection of the side door comes off the photointerrupter. Thus, the light from the LED passes in the photointerrupter and the photointerrupter turns ON. Thus, the output of the photointerrupter is "L".
2nd Cassette Side Door Detecting Sensor (PC23)
Light is blocked: Output = H Side Door Side Door
Light passes: Output = L
[Side door is closed.]
[Side door is open]
(5) 2nd Cassette Paper Size Detection
The paper size for the 2nd paper cassette is set by the switch on the 2nd cassette paper size detecting board (PWB-S2). The switch is a rotary encoder with four output lines. The output levels of the four output lines vary with the rotational angles of the switch. These four outputs are fed to the control circuit on the main board and decoded to detect the paper size being selected. 2nd Cassette Paper Size Detecting Board (PWB-S2) Size 1 Size 2 Size 3 Size 4
Decoder
Paper size decoded signals
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2-3. Paper Feed
The paper taken up by the paper take-up section is fed to the transfer section after registration compensation.
(1) Registration Compensation
To eliminate any paper slant (skew), registration compensation is made by controlling the rotating timing of the paper take-up roller and synchronizing roller. The taken up paper passes the synchronizing roller sensor (PC2) and reaches the synchronizing roller. At this moment, the printer delays turning timing of the synchronizing roller for a moment. As a result, the leading edge of the paper is aligned with the stopping synchronizing roller, eliminating any skew. The leading edge of the paper will slack a little as shown in the figure. Next, the synchronizing clutch (CL1) is activated for feeding the paper to the inside of the printer. At the same time, the paper take-up roller turns for a moment to securely feed the paper. Transport Motor (M2) Synchronizing Roller
1
Slack of paper
2
Slack Paper Take-up Roller Paper Synchronizing Roller Sensor (PC2) [Registration compensation]
3
(2) Paper Feeding
When the synchronizing clutch (CL1) is activated, the power is transmitted to the synchronizing roller from the transport motor (M2) as follows and the paper is fed to the transfer section. 1 The transport motor (M2) turns counterclockwise. 2 The idle gear turns clockwise. The synchronizing clutch (CL1) turns ON. 3 The idle gear turns counterclockwise. 4 The synchronizing roller turns clockwise. Paper is fed. The PC drum is driven by the I/C drive motor (M1). As the PC drum turns, the transfer roller also turns. Accordingly, the paper fed by the synchronizing roller is pinched by the PC drum and transfer roller for feeding to the fusing section. PC Drum Transfer Roller
4
Synchronizing Roller
1
Transport Motor (M2) Synchronizing Clutch (CL1)
3 2
Paper
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PRINT HEAD UNIT (EXPOSURE SECTION)
The print head unit incorporates a laser diode that emits the laser beam corresponding to the print image data. The spot of the laser beam emitted from the laser diode is shaped in a circle through the collimator lens. Then, it is applied to the heptagonal polygon mirror via the cylindrical lens. The polygon mirror is turned by the polygon motor in the print head unit in the direction as shown by the arrow. The reflected laser beam by the rotating polygon mirror passes the three lenses, producing a parallel scanning laser beam. The scanning laser beam scans on the PC drum from left to right for producing an electrostatic latent image on the surface of the PC drum. Collimator Lens Cylindrical Lens Laser Diode Rotational direction SOS Sensor Scanning direction
Heptagonal Polygon Mirror
PC Drum Operation of the SOS Sensor: To maintain the printing density constant, it is required to emit a laser beam at constant laser power. To control the laser power to be constant is called APC (Automatic Power Control). The SOS sensor incorporated in the print head unit is used to detect whether the laser power reaches certain laser power for printing. The SOS sensor is located outside of the printing area. When printing starts, it takes 1 or 2 scans to obtain the SOS sensor output. During printing, the SOS sensor output is monitored in every scanning for controlling the laser power constant.
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MAGING CARTRIDGE
4-1. Parts Names and Functions of the Imaging Cartridge
The following illustrates the construction of the imaging cartridge. The power to the gears of the imaging cartridge is transmitted from the I/C drive motor (M1) of the printer main body. (The I/C drive motor (M1) turns clockwise viewing from the front of the printer.) Charge Brush Cleaning Blade Wasted Toner Box Rotary Blade
Separating Claw PC Drum Laser Beam Transfer Roller Sleeve Roller
Toner Hopper
Toner Feed Roller
Toner Empty Sensor
Parts Name Charge Brush Laser Beam Charges the PC Drum.
Function
Acts to produce an electrostatic latent image on the surface of the PC drum. The laser beam corresponding to the print image data is emitted. Agitates toner with the two agitator blade to feed toner to the toner feed roller. Feeds toner to the sleeve roller. Feeds toner to the electrostatic latent image formed on the surface of the PC drum to produce a visible toner image. Transfers the toner image on the surface of the PC drum onto the paper. (The transfer roller is not incorporated in the imaging cartridge.) Securely separates the paper from the PC drum. Cleans off the toner remaining on the surface of the PC drum. Feeds the wasted toner to the wasted toner box. Detects a toner-empty status. (The toner empty sensor is not incorporated in the imaging cartridge.)
Toner Hopper Toner Feed Roller Sleeve Roller
Transfer Roller
Separating Claw Cleaning Blade Rotary Blade Toner Empty Sensor
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4-2. Charging Section
Before producing an electrostatic latent image on the surface of the PC drum with a laser beam, the PC drum is charged by static electricity with the rotating charge bush so that the surface of the PC drum is negatively charged. The charging system uses the rotating charge brush system. Since this charging system can apply charge directly to the PC drum, charging is possible at a low voltage, producing negligible amount of ozone. The negative level of the surface of the PC drum will be reduced when a laser beam is applied. Note: For the laser beam emission, see 3 "Print Head Unit (Exposure Section)". Charge Brush Charge bias
PC Drum Laser beam
PC drum ground
4-3. Development Section
The development section feeds toner to the electrostatic latent image on the surface of the PC drum to produce a visible toner image. The toner in the toner hopper is agitated by the two agitator blades to feed toner to the toner feed roller. Then, the toner is fed to the sleeve roller which is negatively biased. Accordingly, the toner is negatively charged by the sleeve roller. The toner regulating plates acts to regulate the amount of toner fed to the sleeve roller. To regulate the toner, a voltage lower than the sleeve roller is applied to the toner regulating plates. Since the toner is negatively charged by the sleeve roller, the toner will stick to the electrostatic latent image where the negative voltage is reduced. On the other hand, toner does not stick to the part where no laser beam is applied since the part maintains the negatively charged voltage with the charge brush. The following illustrates an example where the letter "A" is written by the laser beam and toner sticks onto the letter "A" on the surface of the PC drum. Sleeve Roller Agitator Blade Mirror/Window Cleaner Toner Regulating Plate Mirror PC Drum Toner
Developer bias Toner bias
PC Drum
Sleeve Roller Seal Toner Feed Roller
Seal bias
Toner Empty Sensor
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The seal beneath the sleeve roller acts to discharge the negatively-charged unused-toner on the sleeve roller. The discharged toner is fed back to the toner feed roller for recycling it. Note that, during printing, the seal voltage is the same a s the sleeve roller voltage and discharge is not made. However, before and after printing, the voltage of the seal bias is set 100V higher than that of the sleeve roller to discharge the unused toner for recycling. Operation of the Toner Empty Sensor: The toner empty sensor detects the toner-empty status. The sensor is a photo reflector mounted on the printer. If low toner condition occurs, the light emitted from the LED of the photo reflector passes the window of the toner hopper and reflected by the mirror. The reflected light reaches the phototransistor of the photo reflector and the phototransistor turns ON. Thus, the sensor output is "L" when the toner is empty. In actual fact, detection of the toner empty is a little more complicate. Since toner in the hopper is agitated with the agitator blades, toner empty cannot be detected like the ON/OFF status of a switch. The rotating mirror/window blade cleans the mirror and window repeatedly. Basically, the CPU on the main board judges that the toner near empty occurred when a low toner condition has been detected by a certain number of times while the mirror/window blade has been rotated by a certain number of times. Next, the CPU judges that the toner empty occurred when thus detected toner near empty has been counted by a certain number of times. If toner empty is detected, printing becomes impossible.
5
TRANSFER SECTION
The transfer roller transfers the toner image on the surface of the PC drum onto the paper. A positive transfer bias is applied to the transfer roller so that the toner on the surface of the PC drum sticks to the paper. The paper then passes through the comb electrode(?) and the static electricity remaining on the paper is discharged. This enables easy separation of the paper form the PC drum. The separator claw of the imaging cartridge forcibly separates the paper from the PC drum.
Paper PC Drum Comb electrode (??)
PC Drum
Transfer Roller
Transfer bias
Transfer Guide (??)
Transfer Roller
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FUSING SECTION
The power from the transport motor (M2) is transmitted to the upper fusing roller so that the toner-transferred paper is fed from the transfer section to the fusing section. The paper is heated to melt the toner by the upper fusing roller and pressed by the upper and lower fusing rollers. The upper fusing roller is heated by the fusing roller heater lamp (H1) which is built in it. The fusing roller thermistor (TH1) is attached to the upper fusing roller for controlling the heater temperature. Also, the fusing roller thermostat (TH1) and fusing roller heater lamp fuse (TF1) are attached to the upper fusing roller as shown on the next page. The thermostat (TH1) and lamp fuse (TF1) are connected in series to the heater lamp (H1). The heater lamp (H1) is heated when an AC voltage is applied. Temperature control using the thermistor: The resistance of the thermistor (TH1) attached to the upper fusing roller varies with temperatures. When temperature rises, the resistance of the thermistor (TH1) decreases, and vice versa. As shown in the circuit diagram, the thermistor output is connected to an analog port of the CPU on the main board. The input level to the analog port of the CPU decreases as the temperature rises. The CPU performs A/D (Analog-to-Digital) conversion for the input level to know the current temperature. To heat the upper fusing roller, the CPU set the Heater Remote 1 output to ON ("L") state. Then, the triac on the power supply unit turns ON and an AC voltage is applied to the fusing roller heater lamp (H1) and the upper fusing roller is heated. The CPU monitors the output from the thermistor and controls ON/OFF of the triac to control the temperature of the upper fusing roller. When the upper fusing roller temperature becomes abnormal and the output from the thermistor lowers than the predetermined level, the abnormal-heater-temperature detecting circuit is activated and the triac is forcibly turned OFF, resulting in shutting off an AC voltage application to the heater lamp. Rush current preventing circuit for heater lamp (other model, circuit is omitted): To prevent rush current when an AC voltage is applied to the heater lamp, the Heater Remote 2 signal is used. The CPU sends this signal to the (another) triac in the form of pulse before outputting the Heater Remote 1 signal. Then, the additional resistor is connected in series to the heater lamp to suppress the rush current flowing into the heater lamp. Thermostat (TS1) and heater lamp fuse (TF1): If an abnormal current flows into the heater lamp because of thermistor trouble, etc. and the upper fusing roller temperature reaches about 220ûC, the contact of the thermostat automatically opens to shut off an AC voltage. (As the temperature decreases, the contact of the thermostat closes again. However, once the thermostat has been activated, it must be replaced with new one.) When a large abnormal current suddenly flows into the heater lamp, since the thermostat cannot respond quickly, the heater lamp fuse is blown to protect the heater lamp.
Heater Lamp Fuse Heater Lamp Fuse Power Switch Power Switch
S1 S1 AC AC Input Input
F2
Thermostat Thermostat TF1 TF1
Heater Lamp Heater Lamp H1 H1
CPU CPU
Analog IN AnalogIN
TS1 TS1
TH1 TH1 Thermistor Thermistor Abnormal Heater Abnormal Heater Temperature Temperature Detecting Circuit Detecting Circuit
Heater Heater Remote Remote 1 Power Supply Unit Power Supply Unit Main Board Main Board
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Fusing temperature control: · When the power switch is turned ON, the printer starts warm-up until the upper fusing roller temperature reaches approx. 200°C. (It will take about one minute.) (Warming-up mode) · To maintain the upper fusing roller temperature above 190°C, the control circuit raises the temperature and keeps at approx. 210°C for approx. five minutes. (Mode 1) · The control circuit gradually decreases the temperature by 190°C in five minutes. (Mode 2) · Preparing for printing, the control circuit keeps the upper fusing roller temperature at approx. 190°C. (Mode 3) · In energy saving mode, the control circuit turns OFF the heater lamp. (*: 190°C --> 183°C for foreign model??)
°C °C 210 210 200 200
Temp. for Print Temp. for Print Temp. for Standby Temp. for Standby
190 190
Warm-up Warm-up
Mode 1 Mode 1
Mode 2 Mode 2
Mode Mode 3
Energy Energy Save Save
1 min. 1 min. Power ON Power ON
5 min. 5 min.
5 min. min.
Heater OFF Heater OFF
Thermostat (TS1)
Lower Fusing Roller
Thermistor (TH1)
Heater Lamp Fuse (TF1) Upper Fusing Roller (Heater Lamp (H1))
Paper
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PAPER EXIT SECTION
The paper fed from the fusing section passes through the paper exit roller and ejected to the top of the printer with its printed side facing down. The transmit power for feeding paper is given by the transport motor (M2) and transmitted in the order from 1 ~ B shown in the figure.s The paper exit sensor (PC3) detects ejection of paper. This sensor uses a photointerrupter. During paper is passing through the sensor, the sensor arm is pressed by the paper so that the end of the sensor arm engages with the photointerrupter. In this condition, the light emitted from the LED of the photointerrupter is blocked and does not reach the phototransistor. Thus, the phototransistor turns OFF and the output of the photointerrupter is "H". When paper has passed the sensor, the sensor arm returns to the original position by spring force so that the end of the sensor arm comes off the photointerrupter. Thus, the light emitted form the LED passes in the photointerrupter, the phototransistor turns ON, and the output of the photointerrupter is "L".
Paper Exit Sensor (PC3)
Paper Exit Roller
B
Paper Exit Sensor (PC3)
A
Paper
0
Lower Fusing Roller
9 8
Upper Fusing Roller Paper Exit Sensor (PC3)
7 6 5
Light passes: Output=L [No paper]
PC Drum
4
Transport Motor (M2) Synchronizing Roller Paper Light is blocked: Output=H [Paper is present.] Synchronizing Roller Sensor (PC2)
3 1
2
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PagePro25
8
DETECTION OF A NEW IMAGING CARTRIDGE
The printer has the function to detect whether the newly installed imaging cartridge is a new one or used one. In the imaging cartridge, an internal circuit is incorporated as shown in the figure. A fuse is connected in parallel with a resistor and it is not blown. Accordingly, by measuring the voltage across the resistor, the printer can know whether the imaging cartridge is a new one or not. When the printer is turned ON after a new imaging cartridge has been installed, the fuse is blown by the printer. Also, when you close the right door after replacing the image cartridge while the printer is turned ON, the fuse is blown. When the printer blows the fuse, the PC drum counter is cleared to enable detection of the image cartridge life. When power is turned OFF, the counter value is stored in the EEPROM in the imaging cartridge. When power is turned ON, the counter value is recall from the EEPROM from the imaging cartridge for continuing counting.
Internal circuit
F4 R1
Imaging cartridge
9
RIGHT DOOR INTERLOCK SWITCH (S2)
The right door is normally closed. It will be opened when the imaging cartridge is replaced or jammed paper is removed. With the door closed, the projection of the right door presses the switch lever via the spring linked with the switch lever and the switch is ON. When it is opened, the lever of the switch is set free so that the switch is OFF. Right Door Interlock Switch (S2) Projection
Right Door Spring
C-19
PagePro25
10
PRINT SEQUENCE
Pre-printing Printing Pre-printing Printing sequence sequence sequence sequence
Start sequence Starting sequence Starting sequence (2sec) (2sec) OFF OFF Polygon Motor Polygon Motor ON ON OFF OFF Synchronizing Synchronizing Roller Sensor (PC2) ON Roller Sensor (PC2) ON
OFF I/C I/C Drive Motor OFF Drive Motor (M1) (M1) ON ON OFF OFF Charge Bias Charge Bias ON ON
ON ON
Sensor ON Sensor ON
ON
ON ON APC APC 120msec 120msec +120V +120V 20mm 20mm Developing setting bias Developing setting bias Developing bias Developing bias (Varies with paper.) (Varies with paper.)
OFF OFF Exposure Exposure ON ON Developer Bias Developer Bias OFF OFF -200V -200V 100msec 100msec SealSeal Bias OFF Bias OFF
-100V -100V
+220V +220V
VB+ + VB
580msec 580msec OFF Transfer Transfer Bias Bias OFF
(VB: Developer Bias Voltage) (VB: Developer Bias Voltage)
VB VB VB
-700V -700V
+V
40mm 40mm
Multiple sequence
Printing Printing sequence sequence
Sequence between printing Sequence between printing Post printing Pre-printing Pre-printing
Printing Printing sequence sequence
OFF OFF Polygon Motor Polygon Motor ON ON OFF OFF Synchronizing Synchronizing Sensor ON Sensor ON Roller Sensor (PC2) ON Roller Sensor (PC2) ON Sensor OFF SensorOFF Sensor ON Sensor ON
OFF I/C Motor I/C DriveDrive Motor OFF (M1) (M1) ON ON
OFF OFF Charge Bias Bias ON Charge ON
OFF OFF Exposure Exposure ON ON
OFF OFF Developer Bias Bias Developer
Developing bias Developing setting bias Developing bias Developing setting bias (Varies with paper.) (Varies with paper.)
(VB: Developer Bias Voltage) (VB: Developer Bias Voltage) VB VB + 100V + 100V VB
Seal Bias
OFF OFF VB VB
Seal Bias
10mm 10mm +V
Transfer Transfer Bias Bias OFF OFF
52mm 52mm
40mm 40mm
C-20
PagePro25
Ending sequence
Ending sequence Ending sequence
OFF OFF Polygon Motor Polygon Motor ON ON OFF OFF Synchronizing Synchronizing Roller Sensor (PC2) ON ON Roller Sensor (PC2)
OFF I/C DriveDrive Motor OFF I/C Motor (M1) (M1) ON ON OFF OFF Charge Bias Bias ON Charge ON Sensor OFF Sensor OFF
OFF OFF
OFF OFF
OFF Exposure Exposure ON ON Developer BiasBias Developer
Seal Bias
OFF 100msec 100msec Developing Developing setting bias setting bias
OFF OFF
+120V +120V
+220 +220
200msec 200msec -200V -200V
Seal Bias
-100V -100V
OFF OFF
VB VB
+V +V
VB + VB + 100V (VB: Developer Bias Voltage) 100V (VB: Developer Bias Voltage)
Transfer Bias
Transfer Bias
OFF OFF
-V
32mm 32mm
OFF OFF
67mm 67mm 120mm 120mm
Cleaning sequence
Cleaning sequence Cleaning sequence (2sec) (2sec)
Polygon Motor Polygon Motor
OFF OFF ON ON ON ON ON (Locked) ON (Locked)
65mm 65mm
OFF OFF
200msec 200msec
OFF OFF Polygon Polygon Lock Lock ON ON I/C Motor OFF I/C Drive Drive MotorOFF (M1) (M1) ON ON OFF OFF Charge Bias Bias ON Charge ON OFF OFF Exposure Exposure ON ON OFF OFF Developer Developer Bias Bias
OFF OFF
OFF OFF
ON ON 700msec 700msec 120mm 120mm
OFF OFF
ON ON
100msec 100msec +120V +120V
OFF OFF
-200V -200V
Seal OFF Seal Bias BiasOFF
-100V -100V
+220 +220
VB + 100V 100V (VB: Developer BiasVoltage) VB + (VB: Developer Bias Voltage) OFF OFF
OFF Transfer Transfer Bias BiasOFF
-V -V
C-21
PagePro25
11
PARALLEL INTERFACE
11-1.Connector pin assignments (Standard Centronics and IEEE1284-Type B)
No.