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V20 SCANNER
SERVICE MANUAL
17 July, 1997 Subject to change.
1. 2. 3.
4. 5.
IMPORTANT SAFETY NOTICE Before disassembling or assembling parts of the scanner and peripherals, make sure that the scanner power cord is unplugged. The wall outlet should be near the scanner and easily accessible. The output voltage of the PSU (Power Supply Unit) can be either 100 ~ 120 Vac or 220 ~ 240 Vac, without any adjustment. Make sure that the above voltage is used. The power cord should be an approved type, in accordance with the regulations for the country in which the scanner is used. The use of cables other than the shield I/O cables or equivalent specified will invalidate the certification of this scanner and may cause interference levels which exceed the limits established for this equipment.
Maintenance Information The user's manual explains how to use and maintain the scanner. Before performing the maintenance, read the user's manual. Warning concerning copyright Many documents are copyrighted. Such documents may not be reproduced by scanning or in any other form without the express permission of the copyright holder. Notice The contents of this manual are subject to change without notice.
1
17 July, 1997
SPECIFICATIONS
1.1 SPECIFICATIONS
Scanning Method: Document size: Flat-bed with ADF ADF: - Width: 105~297 mm [4.1~11.7 ins] - Length: 128~1260 mm [5.0~49.6 ins] All pages in a document must be the same width Document weight: 52.3 ~ 104.7 g/m2 [14 ~ 27.7 lb.] ADF capacity: 30 sheets [80 g/m2] Book scan: Main scan and Sub scan: 60, 75, 100 ~ 800 dpi ADF: Main scan and Sub scan: 60, 75, 100 ~ 600 dpi 4, 8 bits/pixel About 15 seconds 1.65 s / 200 dpi (A4 short-edge, binary picture mode) 2.33 s / 200 dpi (A3, binary picture mode) 24 ppm / 200 dpi (A4 short-edge, binary picture mode) 12 ppm / 400 dpi (A4 short-edge, binary picture mode) Note: Counted from the second page. SCSI-2 100 ~ 120V ac 50/60 Hz 220 ~ 240V ac 50/60 Hz Standby: 27 W Max. Scanning: 72 W Max. Temperature: 10 ~ 32 °C [50 ~ 90 °F] Humidity: 20 ~ 80 %RH Less than 28 kg [61.7 lbs.] 550 x 500 x 300 mm [21.7 x 19.7 x 11.8 ins]
Scanning output resolution:
Gray scale: Initialization time: Scanning speed:
Scanning throughput (ADF mode):
Interface: Power:
Power consumption:
Operating environment:
Weight: Dimensions (W x D x H):
1-1
Overall Information
1. OVERALL MACHINE INFORMATION
SPECIFICATIONS
11 August, 1997
Scanning Specifications - Book Mode B D Scale A F
Registration: Scanning area:
Skew:
A: 1 ± 1 mm B: 1 ± 1 mm - Guaranteed C: 297 mm D: 432 mm - Maximum C: 307 mm (< 410 dpi) or 4960 dots (> 410 dpi) D: 432 mm Leading edge 100 x (B - E) / C = ± 1% Side edge 100 x (A - F) / C = ± 1%
C
Scanning Area
E
Scanning Direction
G405V507.VSD
- ADF Mode Registration: Scanning area: A: 1 ± 3 mm B: 1 ± 3 mm - Guaranteed C: 297 mm D: 1260 mm - Maximum C: 298 mm (< 422 dpi) or 4960 dots (> 422 dpi) D: 1260 mm Leading edge 100 x (B - E) / C = Side edge
B D
A
F
C
Scanning area
Original Transport Direction
Skew:
E
G405V508.VSD
1-2
17 July, 1997 100 x (A - F) / C = < A4, LT: ± 2.3% = A4, LT: ± 1.8% > A4, LT: ± 1.5%
SPECIFICATIONS
1-3
Overall Information
COMPONENT LAYOUT
11 August, 1997
1.2 COMPONENT LAYOUT
1.2.1 MECHANICAL COMPONENT LAYOUT
1 19 18 17
2
3
4
5
6
7
8
16 9 15
G405V500.CDR
14
13
12
11
10
1. Separation Roller 2. Paper Feed Roller 3. Pick-up Roller 4. 2nd Transport Roller 5. Original Entrance Guide 6. Original Exit Roller 7. Original Table 8. Exposure Glass 9. Scanner Motor 10. SBU (Sensor Board Unit) Board
11. Lens 12. Xenon Lamp 13. 1st Mirror 14. 3rd Mirror 15. 2nd Mirror 16. DF Exposure Glass 17. Original Exposure Guide 18. 1st Transport Roller 19. Original Feed Belt
1-4
17 July, 1997
ELECTRICAL COMPONENT LAYOUT
11 10 9 8
1
2
3
4 5
6
7
GG405V501.CDR
12 22
13 14 15 16
21
20 17 19
G405V502.CDR
18
1. DF Feed Clutch 2. Feed Cover Open Sensor 3. DF Feed Motor 4. DF Pick-up Solenoid 5. DF Drive PCB 6. DF Position Sensor 7. Original Width Sensor 3 8. Original Width Sensor 2 9. Original Width Sensor 1 10. Original Set Sensor 11. Registration Sensor
12. Scanner H.P Sensor 13. Lamp Stabilizer 14. SIU (SCSI Interface Unit) 15. SBU (Sensor Board Unit) 16. Scanner Motor 17. IPU (Image Processing Unit) - Option 18. SCU (Scanner Control Unit) 19. PSU (Power Supply Unit) 20. Main Switch 21. Indicator Panel 22. Xenon Lamp
1-5
Overall Information
1.3 ELECTRICAL COMPONENT LAYOUT
ELECTRICAL COMPONENT DESCRIPTIONS
11 August, 1997
1.4 ELECTRICAL COMPONENT DESCRIPTIONS
Index Description No. Printed Circuit Board PCB 1 18 SCU PCB 2 14 SIU PCB 3 19 PSU PCB 4 15 SBU PCB 5 PCB 6 PCB 7 PCB 8 5 13 21 17 DF Drive Lamp Stabilizer Indicator Panel IPU (Option) Symbol Note
Controls the overall scanner function. This contains the SCSI controller. Provides dc voltages to the system. Contains the CCD, and outputs a video signal to the SCU board. Interfaces the electrical signals from the ADF and the SCU board. Provides dc power for the xenon lamp. This contains the scanner indicator lamps. Performs automatic text/image separation and dynamic thresholding
Motors M1 M2 Sensors S1 S2 S3 S4 S5 S6 S7 S8
3 16
DF Scanner
Drives all DF rollers. Drives the scanners.
2 6 9 8 7 10 11 12
Feed Cover Open DF Position Original Width 1 Original Width 2 Original Width 3 Original Set Registration Scanner H.P Sensor
Detects whether the feed-in cover is opened or not. Detects whether the DF is lifted or not. Detects the original width. Detects the original width. Detects the original width. Detects if an original is on the feed table. Detects the original exposure timing, and checks for original misfeeds. Informs the CPU when the 1st and 2nd scanners are at the home position.
Switches SW 1
20
Main
Supplies power to the scanner.
Magnetic Clutches CL 1 1 DF Feed
Transfers DF motor drive to the pick-up roller and feed belt.
Solenoids SOL 1 Lamps L1
4
DF Pick-up
Controls the up-down movement of the original table. Applies light to the original for exposure.
22
Xenon
1-6
17 July, 1997
DRIVE LAYOUT
7 6
8
1 2
5
4 3
GG405V503.CDR
10 9 11 12
11 13 12
GG405V504.CDR
1. DF Feed Clutch 2. DF Feed Motor 3. Exit Roller 4. 2nd Transport Roller 5. 1st Transport Roller 6. Separation Roller 7. Original Feed Belt
8. Pick-up Roller 9. 2nd Scanner 10. 1st Scanner 11. Scanner Wire 12. Scanner Drive Pulley 13. Scanner Motor
1-7
Overall Information
1.5 DRIVE LAYOUT
BOARD STRUCTURE
11 August, 1997
1.6 BOARD STRUCTURE
1.6.1 OVERVIEW
Xenon Lamp Lamp Stabilizer
Indicator Panel
Sensors
ADF
Motor
SBU
RS232C
EEPROM
I/O Expander CPU RAM ROM
Motor Driver
SCU
SIP3 (Image Processing)
SCSI-2
SCSI Controller
SBC (Memory Controller)
IPU (Option)
PSU
DRAM
SIU
Data signal Image signal
G405V505.VSD
1-8
17 July, 1997
BOARD STRUCTURE
1. SCU (Scanner Control Unit) This is the main control board. It controls the following functions: · Scanner control, system control · Image processing, video control · RS232C interface for future use 2. SIU (SCSI Interface Unit) This board contains the SCSI controller and the memory controller. This board interfaces the scanner to a host computer. 3. SBU *Sensor Board Unit) The SBU receives the analog signals from the CCD and converts them into digital signals. 4. PSU (Power Supply Unit) This provides +5V, +24V, and ±12V dc to the scanner. 5. Indicator Panel This indicates the scanner condition using four LEDs. 6. IPU (Image Processing Unit) - Optional equipment This board performs automatic image/text separation and dynamic thresholding.
1-9
Overall Information
1.6.2 DESCRIPTION
17 July, 1997
INITIALIZATION
2. DETAILED SECTION DESCRIPTIONS
2.1 INITIALIZATION
Detailed Descriptions
During power-up initialization, the machine initializes the PCBs, flatbed scanner mechanism, and ADF mechanism, to detect errors. The errors which can be detected during initialization are as follows: 1. Memory Error 2. Scanner Home Position Error 3. Jams in the ADF Refer to section 7 for more information about these errors.
2-1
BOOK MODE
11 August, 1997
2.2 BOOK MODE
2.2.1 OVERVIEW
When the machine receives the book mode scan command from a host computer, it initializes the shading data (by scanning the white sheet between the main exposure glass and the DF exposure glass) and sets the video processing parameters as requested by the host computer. Then, the machine scans the specified area, and transfers the scanned data to the host computer. After scanning an original, the 1st and 2nd scanners move back to the home position. If the machine receives an ABORT command while scanning an original, the machine stops scanning and moves the 1st and 2nd scanners to the home position.
2.2.2 SCANNER OPTICS
[E] [A]
G405D001.CDR
[F] [D]
[C]
[B]
The original is illuminated by the exposure lamp (a xenon lamp in this model) [A]. The image is reflected onto a CCD (charge coupled device) [B] via the 1st, 2nd, 3rd mirrors, and lens [C]. The 1st scanner [D] consists of the exposure lamp, a reflector [E], and the 1st mirror [F]. The exposure lamp is energized by a dc supply to avoid uneven light intensity as the 1st scanner moves in the sub scan direction. The entire exposure lamp surface is frosted to ensure even exposure in the main scan direction. The light reflected by the reflector is of almost equal intensity, to reduce shadows on pasted originals.
2-2
17 July, 1997
BOOK MODE
2.2.3 DRIVE MECHANISM
[H] [B] [A]
Detailed Descriptions
[E]
[D] [G] [F]
G405D002.CDR
[C]
A stepper motor is used to drive the scanner. The 1st and 2nd scanners [A,B] are driven by this scanner drive motor [C] through the timing belt [D], scanner drive pulley [E], scanner drive shaft [F], and two scanner wires [G]. The scanner drive board controls and operates the scanner drive motor. The drive speed of the 1st scanner is different for each scanning mode. (Maximum scanning speed: 180 mm/s) The 2nd scanner speed is half that of the 1st scanner. The returning speed is always the same (360 mm/s). The resolution change in the sub scan direction is done by changing the scanner drive motor speed, and in the main scan direction it is done by image processing on the SCU board.
2.2.4 ERROR CONDITIONS
The machine detects the following errors in book mode scanning.
Error Lamp error Scanner home position error Condition The CPU does not detect the specified output level of the CCD while scanning the white plate. The CPU does not detect the signal change of the home position sensor [H] within the specified period while moving the 1st scanner back and forth.
Refer to section 7 for more information about these errors.
2-3
ADF MODE
11 August, 1997
2.3 ADF MODE
2.3.1 OVERVIEW
When the machine is requested to scan originals using the ADF (Automatic Document Feeder), if an original is placed in the ADF, it initializes the shading data (by scanning the white sheet attached to the back of the DF exposure glass assembly) and sets the video processing parameters as requested by the host computer. Then, the machine moves the 1st scanner to the home position, and scans the original by feeding it through the scan position. When the machine receives an ABORT or UNLOAD command while scanning, the machine stops scanning and feeds out the original being scanned.
2.3.2 ORIGINAL WIDTH DETECTION (AVAILABLE IN ADF MODE ONLY)
[C]
[B]
[A]
G405D003.CDR
The ADF has three width sensors (- 1 [A], - 2 [B], and - 3[C]) to detect the original width. The machine detects the original width from the combination of outputs from those three sensors. If the scanner receives the command to send the document width, it sends the document width data in accordance with the document width sensors' signals. The relation between the document size, sensors' signals, and the width data is shown in the table below.
2-4
17 July, 1997
ADF MODE
Note that the width data depends on the setting of dip switch 3. If the switch is ON, the scanner recognizes that an original of a European size has been set. If the switch is OFF, the scanner recognizes that an original of an American size has been set.
Document Size Width Sensor 1 2 3 L L L L L H L H H Width Data (mm) DIP SW3 DIP SW3 OFF ON 280 297 257 216 257 210
Detailed Descriptions
A3 (Lengthwise), A4 (Sideways), 11" x 17", 11" x 15", 11" x 8.5" B4 (Lengthwise), B5 (Sideways), 10" x 14" A4 (Lengthwise), A5 (Sideways), 8.5" x 11", 8.5" x 14", 8" x 13", 8.5" x 13", 8.5" x 5.5" B5 (Lengthwise), B6 (Lengthwise), B6 (Sideways), A5 (Lengthwise), 5.5" x 8.5"
H
H
H
140
148
L: Activated, H: Deactivated
2-5
ADF MODE
11 August, 1997
2.3.3 PICK-UP AND SEPARATION
- ADF Mode When the machine receives a scan request from a host computer, the machine starts feeding the original (if it has been placed on the original table. If an original is not present, the machine returns an error to the host computer.
- SADF Mode (also known as Medium Wait mode) When the machine receives a scan request from a host computer, the machine waits for an original to be placed on the original table. If the original is placed on the table within the specified time, the machine starts feeding. - Mechanism -
[B] [F]
[C] [D]
[A]
G405D004.CDR
[G] [B] [E]
G405D006.CDR
[F]
G405D005.CDR
When the machine receives the ADF scan command, the DF pick-up solenoid [A] turns on and the originals are lifted up to the pick-up roller [B] by the entrance guide [C]. At the same time, the DF feed clutch [D] turns on. At 300 ms after this, the DF feed motor turns on. The original is fed to the paper feed belt [E] from the top page. The pages of the original are separated using an FRR system by the separation roller [F], and the top sheet of the original is fed to the 1st transport roller [G] at the maximum speed of the ADF (257 mm/s).
2-6
17 July, 1997
ADF MODE
2.3.4 ORIGINAL TRANSPORT, SCANNING, AND EXIT MECHANISM
[D]
[A]
[B]
[C]
G405D007.CDR
When the leading edge of the original reaches the registration sensor [A], the DF feed motor turns off. Then the scanner changes the document feed speed setting depending on the scanning resolution (e.g. 180 mm/s for 200 dpi). Then, the motor turns on again. The machine starts scanning when the leading edge of the specified scanning area reaches the ADF scanning position [B] which is just over the home position of the 1st scanner. The machine scans each main scanning line while feeding the document. The maximum output resolution in ADF mode is 600 dpi in both main and sub scan directions, while in the book mode it is 800 dpi. The document is fed through the 2nd transport roller [C] and fed out by the exit roller [D]. If the scanner continues to scan the next page on the document table, the scanner repeats the image scanning steps. When a page is fed out, the next page has been already fed into the scanner. However, the feed belt is slower than the transport rollers, so there is a gap between the pages.
2-7
Detailed Descriptions
ADF MODE
11 August, 1997
2.3.5 LENGTH DETECTION (AVAILABLE IN ADF MODE ONLY)
If the scanner receives a command to send the document length, after finishing scanning it sends the length that was specified by the Set Window command (used to specify the scan area). However, if the document is shorter than the scanning length specified by the Set Window command, the scanner sends the document length calculated by counting the document feed motor pulses while the registration sensor was on during scanning.
2.3.6 ERROR CONDITIONS
The machine detects the following errors in ADF mode scanning.
Error Lamp error Scanner home position error ADF lifted up ADF cover open Original misfeed Original jam Condition The CPU does not detect the specified output level of the CCD while scanning the white plate. The CPU does not detect the signal change of the home position sensor within the specified period while moving the 1st scanner back and forth. The CPU detects the error using the cover open and feed cover open sensor signals. The LED indication is the same in both conditions. Refer to the next section. Refer to the next section.
2-8
17 July, 1997
DF Feed Motor t5
300 ms
2.3.7 TIMING CHART
DF Pick-up Solenoid
DF Feed Clutch t4
Original Set Sensor
Original Width Sensor
t3
2-9
JAM5 JAM3 JAM4 JAM3 JAM4 JAM5
Registration Sensor
t1
t2
(F Gate)
(Jam Check)
JAM2
JAM1
(1s)
G405D008.VSD
F Gate: Indicates effective data length in sub scan direction.
ADF MODE
Detailed Descriptions
ADF MODE
11 August, 1997
2.3.8 JAM DETECTION
J1: The leading edge of the 1st page did not reach the registration sensor within 3 s after the DF feed motor turned on. The machine indicates a misfeed condition. J2: The trailing edge of the 1st page did not pass through the registration sensor within the time required for feeding 1,290 mm. The machine indicates a jam condition. J3: The leading edge of the 2nd (or later) page did not reach the registration sensor within the time required for feeding 200 mm. The machine indicates a misfeed condition. J4: The leading edge of the page reached the registration sensor before the FGATE signal (which indicates that scanning is in progress) for the previous page turns off. The machine indicates a jam condition. J5: If the length of the 1st page is more than 432 mm: The trailing edge of the 2nd (or later) page did not pass through the registration sensor within the time required for feeding the length of the 1st page + 30 mm. If the length of the 1st page is not more than 432 mm: The trailing edge of the 2nd (or later) page did not pass through the registration sensor within the time required for feeding 462 mm. The machine indicates a jam condition. Time limits (see the timing chart on the previous page)
Example Modes 200 dpi A4 Lengthwise Binary picture 400 dpi A3 Lengthwise Binary picture 600 dpi A4 Sideways Grayscale t1 (s) 0.28 t2 (s) 1.65 - 1.68 t3 (s) 0.23 - 0.31 t4 (s) 0 - 0.09 t5 (s) 0.81
0.42
4.67 - 4.72
0.46 - 0.61
0 - 0.18
1.63
0.54
3.50 - 3.59
0.70 - 0.92
0 - 0.27
2.44
2-10
17 July, 1997
VIDEO PROCESSING
2.4 VIDEO PROCESSING
SBU
Detailed Descriptions
Process
Amplifier
A/D Converter
Digital Data Processing IPU
Digital Data Processing
SCU
Host Interface Analog data Binary processing Grayscale processing
G405D009.VSD
SIU
2-11
VIDEO PROCESSING
11 August, 1997
2.4.1 SBU (SENSOR BOARD UNIT)
The CCD on the SBU converts the light reflected from the original into an analog signal. The analog signals are amplified, and converted to 8-bit digital signals by the A/D converter on the SBU. This will give a value for each pixel on a scale of 256 grades. Then, the digitized image data goes to the SCU board.
2.4.2 SCU (SCANNER CONTROL UNIT)
The image data sent from the SBU goes to the SIP3 (Scanner Imaging Peripheral 3) on the SCU board, which processes the image data in accordance with the parameters set by the command from the host computer. Then the SCU sends the data (binary or grayscale) to the SIU (SCSI Interface Unit).
2.4.3 IPU (IMAGE PROCESSING UNIT) - OPTIONAL
The IPU gives the following additional functions. · Automatic Photo/Text Separation · Dynamic Thresholding When the machine receives the command which specifies use of one of the above functions, the IPU receives both the grayscale and the binary data from the SCU. The IPU processes the data and outputs the final binary data to the SCU. Refer to section 8 for more information about the IPU.
2.4.4 SIU (SCSI INTERFACE UNIT)
The data sent from the SCU goes into the buffer memory (DRAM) on the SIU. The SIU outputs the data to the host computer while handshaking with it. This machine uses a SCSI controller which conforms to SCSI-2. The data transfer speed is 5 Mbytes/s (asynchronous transfer) or 10 Mbytes/s (synchronous transfer).
2-12
17 July, 1997
PCBS AND THEIR FUNCTIONS
2.5 PCBS AND THEIR FUNCTIONS
2.5.1 SCU (SCANNER CONTROL UNIT)
SBU
SRAM
SIP3
FIFO
CPU Bus
Rotary SW
DIP SW
EPROM
SRAM
EEPROM
CPU H8/ 3003
Enhanced I/O
Control Signal Image Data
Scanner Motor Driver
G405D010.VSD
The major functions of the SCU are: 1) Image data processing 2) Sequential control 3) Interface unit (SIU) control 4) Optional unit (IPU) control The major components on the SCU are: CPU · Hitachi HD6413003FR-12 (H8/3003)
2-13
Detailed Descriptions
IPU
SIU
PCBS AND THEIR FUNCTIONS
11 August, 1997
SIP3 (Scanner Imaging Peripheral 3) · Generates the basic drive clock for the CCD · Shading correction · Image processing · The connected FIFO (5 kbits x 8) is used for line memory · The connected SRAM (64 kbits) is used for image data buffer SRAM · Work area (256 kbits) EPROM · Includes the firmware (256 kbits) Enhanced I/O · Extension for the I/O port · A push switch (mode enable button), scanner display LEDs, home position sensor, and DF drive PCB are connected EEPROM · Holds the book, ADF, and lamp on time counter values (1k bits) · Holds the image registration values If the SCU is changed, the EEPROM from the old SCU must be removed and put on the new SCU. Scanner Motor Driver · Drives the scanner motor
2-14
17 July, 1997
PCBS AND THEIR FUNCTIONS
2.5.2 SIU (SCSI INTERFACE UNIT)
SCU
SBC SCSI Connector
DRAM
Control Signal Image Data
G405D011.VSD
The functions of the SIU are: 1) SCSI interface control 2) Buffer memory control 3) Supplies terminator power to the other connected SCSI devices The major components on the SIU are: SBC (Scan Buffer Controller) · Stores the image data from the SIP3 in the memory (DRAM 4Mbits). · Address control when recalling the data from the memory SCSI controller · NCR 53CF92A which supports the SCAM (SCSI Configured AutoMatically) function · Conforms to SCSI-2
2-15
Detailed Descriptions
SCSI Controller
SCSI Connector
PCBS AND THEIR FUNCTIONS
11 August, 1997
- SCAM Function With this function, the SCSI ID is set automatically by the SCSI adapter in the host computer. This function can be used only when the SCSI adapter in the host computer also has this function, and DIP switch #1 of the machine is turned on. When this function is enabled, the setting of the rotary switch is ignored. If DIP switch #1 is turned off or the SCSI adapter does not support this function, the SCSI ID of the machine must be set by the rotary switch. If two units of this machine are connected to a SCSI adapter included in a host computer which supports the SCAM function, the SCSI ID of one or both machines must be set manually (turn off DIP switch #1 and set the rotary switch to the appropriate ID). This is because the machine has the same product ID and the host computer can not distinguish between two machines with the same product ID.
2-16
17 July, 1997
ENVIRONMENT
3. INSTALLATION
3.1 ENVIRONMENT
Please observe the following precautions in order to ensure safe operation of the scanner and to realize its full performance. N Ambient illumination must be less than 2,000 lux (do not expose to direct sunlight). N Do not use the scanner in any location that is exposed to frequent vibration. N Do not expose the scanner to dusty or corrosive atmospheric conditions (30 m3/hr/person). N Ensure that the area in which the scanner is used is well ventilated. N Make sure that the surface on which you place the scanner is stable and level.
3.1.1 ENVIRONMENTAL CONDITIONS
Temperature: Humidity: 10 to 32 GC (50 to 90 GF) 20 to 80 %
3.1.2 MACHINE LEVEL
1. Front to Back: Within 5 mm (0.2") of level 2. Right to Left: Within 5 mm (0.2") of level
3.1.3 MINIMUM SPACE REQUIREMENTS
Place the scanner near a power source, providing clearance as shown. A: 50 mm (2 ins) B: 100 mm (4 ins) C: 30 mm (1.2 ins) D: 600 mm (23.6 ins)
G405I500.CDR
G405I501.CDR
3-1
Installation
INSTALLATION PROCEDURES
11 August, 1997
3.1.4 POWER REQUIREMENTS
CAUTION 1. Be sure to ground the scanner. 2. Make sure the plug is firmly inserted in the outlet. 3. Avoid multi-wiring.
1. Input voltage level: N 100 to 120 V ac (50/60 Hz) N 220 to 240 V ac (50/60 Hz) 2. Permissible voltage fluctuation: H 10%
3.2 INSTALLATION PROCEDURES
Please refer to the scanner user's manual for details.
3-2
17 July, 1997
SERVICE MODE
4. SERVICE TABLES
4.1 SERVICE MODE
4.1.1 OVERVIEW
[C]
1 2 3 4 5 6 7 8
G405M501.VSD
[A] [B]
ON
3
Use the DIP switches [A], the rotary switch [B], and the push switch [C], located at the rear panel of the machine, to perform the various service mode functions.
4.1.2 DIP SWITCH SETTINGS
Service Tables
SW No. 1
Function SCAM (SCSI Configured AutoMatically) function OFF: Enabled ON: Disabled
2 3
4 5 to 8
Not used Paper sizes detected OFF: US ON: European Not used. Test mode selection
Comments "SCAM enabled" is the default setting. When SCAM is disabled, the SCSI ID must be programmed using the rotary switch. Disable the SCAM function when: 1. Two or more units of this machine are installed on a SCSI bus. 2. SCAM does not assign a SCSI ID to this machine automatically. Do not adjust. Do not change the setting. This switch determines the paper size group detected using the ADF paper size sensors. Do not change the setting. Refer to the tables on the following pages for full details.
4-1
SERVICE MODE
11 August, 1997
Test Mode Settings
SW5 OFF OFF OFF OFF OFF OFF ON ON ON ON SW6 OFF OFF OFF ON ON ON OFF OFF OFF ON SW7 OFF OFF ON OFF OFF ON OFF OFF ON ON SW8 OFF ON ON OFF ON OFF OFF ON OFF ON Function Normal mode Demonstration mode Lamp, solenoid, and clutch test Sensor test Self diagnostics test Factory mode ADF scan counter Flatbed scan counter Lamp on-time counter Do not use Comments Refer to section 4.1.3. Refer to section 4.1.4. Refer to section 4.1.5. Refer to section 4.1.6. Do not use this setting. Refer to section 4.1.7. Refer to section 4.1.7. Refer to section 4.1.7. .
4.1.3 DEMONSTRATION MODE
DIPSW 5 6 7 8 Setting OFF OFF OFF ON Rotary SW 0 1 2 3 4 and 5 6 7 to 9 Function Book mode (200 dpi) Book mode (400 dpi) ADF mode (200 dpi) ADF mode (400 dpi) Not used ADF free run Not used
1. Turn off the machine and adjust the DIPSW and rotary switch settings as shown above. 2. Turn on the machine. · Book mode - The machine starts scanning whether an original is present or not. · ADF mode - The machine starts scanning when an original is placed into the feeder. · ADF free run - The machine starts scanning without an original in the feeder. Feed timings are the same as those in the ADF mode 200 dpi test. 3. Turn off the machine to finish the test, then reset the switches. NOTE: 1) If the rotary switch is set to the "Not used" position, all the LEDs turn on. 2) If the machine detects a jam while feeding originals, the machine stops the test.
4-2
17 July, 1997
SERVICE MODE
4.1.4 LAMP, SOLENOID AND CLUTCH TEST
DIPSW 5 6 7 8 Setting OFF OFF ON ON Rotary SW 0 1 2 3 4 to 9 Function All OFF Scanner lamp ON/OFF DF pick-up solenoid ON/OFF DF feed clutch ON/OFF Not used
1. Turn off the machine and adjust the DIPSW and rotary switch settings as shown above. 2. Turn on the machine. The selected component is activated. Use the push switch to switch the selected component on (activated) and off (deactivated). 3. Turn off the machine to finish the test, then reset the switches. NOTE: To test an another component, adjust the rotary switch after turning off the machine.
4.1.5 SENSOR TEST
DIPSW 5 6 7 8 Setting OFF ON OFF OFF Rotary SW 0 1 2 3 4 5 to 9 Function Scanner home position sensor test DF registration sensor test DF position sensor test DF original sensor test DF cover open sensor test Not used
1. Turn off the machine and adjust the DIPSW and rotary switch settings as shown above. 2. Turn on the machine. 3. Test the selected sensor. If the sensor is activated, all the LEDs are turned on. Example: To test the DF cover open sensor, open and close the DF cover and check if the LEDs turn on and off. 4. Turn off the machine to finish the test. Reset the switches. NOTE: To test an another component, adjust the rotary switch after turning off the machine.
4-3
Service Tables
SERVICE MODE
11 August, 1997
4.1.6 SELF DIAGNOSTICS
LED DIPSW 5 6 7 8 Setting OFF ON OFF ON Power (Green) Blinking Blinking Blinking Blinking Busy (Amber) OFF Blinking Blinking Blinking Original Set (Green) OFF ON Blinking Blinking Error (Red) OFF ON ON Blinking Error Memory error Lamp error Home position error Shading error
1. Turn off the machine and adjust the DIPSW settings, as shown above. 2. Turn on the machine. If the machine detects an error, the machine displays the error as shown above. 3. Turn off the machine to finish the test. Reset the switches. NOTE: 1) Refer to section "7. TROUBLESHOOTING" for details of each error. 2) The rotary switch is not used for this test.
4.1.7 COUNTER DISPLAYS
DIPSW 5 6 7 8 DF ON OFF OFF OFF Book ON OFF OFF ON Lamp ON OFF ON OFF Rotary SW 0 1 2 3 4 5 6 7 8 and 9 Function Not used Unit digit display Tens digit display Hundreds digit display Thousands digit display Ten thousands digit display Hundred thousands digit display Millions digit display Not used
1. Turn off the machine and adjust the DIPSW and rotary switch settings as shown above.
4-4
17 July, 1997
SERVICE MODE
2. Turn on the machine. The machine shows the selected digit (in binary form) using an LED combination as shown below.
Power (Green) OFF OFF OFF OFF OFF OFF OFF OFF ON ON Busy (Amber) OFF OFF OFF OFF ON ON ON ON OFF OFF Original Set (Green) OFF OFF ON ON OFF OFF ON ON OFF OFF Error (Red) OFF ON OFF ON OFF ON OFF ON OFF ON
Number 0 1 2 3 4 5 6 7 8 9
Display another digit by adjusting the rotary switch (without turning off the machine). The counter units are as follows: · DF scan counter - sheets · Book scan counter - sheets · Lamp on-time counter - hours 3. Turn off the machine to finish the test, then reset the switches.
4-5
Service Tables
SWITCHES/LEDS
11 August, 1997
4.2 SWITCHES/LEDS
4.2.1 SCU
Item SW1 SW2 SW3 TP6 TP7 TP8 TP10 TP11 Function 8-bit DIP switch Rotary switch Push switch COM1 ground +5V from the PSU +24V from the PSU +12V from the PSU -12V from the PSU
4.2.2 SIU
Item TP1 TP2 Function COM1 ground +5V from the SCU
4.3 SPECIAL TOOLS
Part Number A0069104 G4049003 G4049005 G4049004 G4049006 H2039114 Name Scanner Positioning Tool (4 pcs./set) RS-13 Chart (A5) RS-13 Chart (A4) RS-13 Chart (A3, 55 kg) RS-13 Chart (A3, 90 kg) RS-12 Chart (A3)
4-6
17 July, 1997
PM TABLE
5. PREVENTIVE MAINTENANCE
5.1 PM TABLE
SCANNER/OPTICS Reflector 1st Mirror 2nd Mirror 3rd Mirror Scanner Guide Rails Exposure Glass DF Separation Roller Assembly EM C C C C C C EM C 100k 200k 300k Note Optics cloth Optics cloth Optics cloth Optics cloth Do not use alcohol Dry cloth or alcohol 240k R
60k R
120k R
180k R
Separation Roller
C
R
R
R
R
PM for the scanner optics should be done by the user.
5-1
Preventive Maintenance
White Plate DF Exposure Glass Platen Cover
C C C
User replacement. (Maintenance kit) Use alcohol for cleaning. User replacement (Maintenance kit) Use alcohol for cleaning. Dry cloth or alcohol Dry cloth or water Dry cloth or alcohol
17 July, 1997
EXTERIOR
6. REPLACEMENT AND ADJUSTMENT
6.1 EXTERIOR
[C] [B]
[D] [A] [E]
G405R516.CDR
6.1.1 OUTER COVERS
Replacement Adjustment
1. Remove the right cover [A] (5 screws). 2. Remove the left cover [B] (5 screws). 3. Remove the rear scale [C] (3 screws). 4. Remove the connector cover [D]. 5. Remove the front cover [E] (7 screws).
6-1
EXTERIOR
11 August, 1997
6.1.2 EXPOSURE GLASS/DF EXPOSURE GLASS/LEFT SCALE
[B]
[A]
G405R502.CDR
[D] [E] [C] [F]
G405R518.CDR
G405R517.VSD
1. Remove the rear scale and left cover (see Outer Covers). 2. Remove the exposure glass with the left scale [A] (2 screws). 3. Remove the left scale [B]. NOTE: 1) Before installing the new left scale, remove the remaining glue on the exposure glass. 2) When installing the new left scale, peel off the backing of the double-sided tape [C], attached to the underside of the left scale [D]. 4. Remove the DF exposure glass [E]. NOTE: When installing the DF exposure glass, make sure the white dot [F] on the DF exposure glass is positioned as shown.
6-2
17 July, 1997
SCANNER UNIT
6.2 SCANNER UNIT
6.2.1 LENS COVERS
[C] [A]
[B] [D]
G405R500.cdr
1. Remove the rear scale and right cover (see Outer Covers). 2. Remove the exposure glass with the left scale (see Exposure Glass). 3. Remove the flat cable [A] (1 screw). 4. Remove the right lens cover [B] (6 screws) and left lens cover [C] (5 screws). NOTE: Move the scanner [D] to access the screw, as shown.
6-3
Replacement Adjustment
SCANNER UNIT
11 August, 1997
6.2.2 SCANNER FRAMES/UPPER REAR COVER
[E] [B] [A]
[H]
[F]
[C]
[G]
[D]
G405R503.cdr
1. Remove the ADF (see ADF Removal). 2. Remove all outer covers (see Outer Covers). 3. Remove the exposure glass with left scale and DF exposure glass (see Exposure Glass/DF Exposure Glass/Left Scale). 4. Remove the upper rear cover [A] (2 screws). 5. Remove the exposure glass bracket [B] (1 screw). 6. Remove the rear cover [C] (4 screws). 7. Remove the lower rear scanner frame [D] (6 screws). 8. Disconnect the scanner H.P. sensor [E] and remove the frame [F] (1 connector and 2 screws). 9. Remove the indicator panel [G] (1 connector and 1 screw). 10. Remove the front scanner frame [H] (5 screws).
6-4
17 July, 1997
SCANNER UNIT
6.2.3 LENS BLOCK
[B]
[A]
G405R505.CDR
1. Remove the exposure glass and operation panel (see Exposure Glass/DF Exposure Glass/Left Scale). 2. Remove the lens covers (see Lens Covers). 3. Disconnect the flat cable [A]. 4. Remove the lens block [B] (1 grounding wire and 4 screws). NOTE: Do not touch the surface of the lens.
Replacement Adjustment
6-5
SCANNER UNIT
11 August, 1997
6.2.4 XENON LAMP
[B]
G405R506.CDR
[A]
1. Remove the exposure glasses (see Exposure Glass/DF Exposure Glass/Left Scale). 2. Remove the scanner frames (see Scanner Frames). 3. Press the lamp holder [A] down with a screwdriver. 4. Slide the xenon lamp [B] to the front and remove it (1 connector). NOTE: Do not touch the glass surface of the xenon lamp. 5. After installing the new lamp, press the lamp holder into the original position to hold the lamp properly.
6-6
17 July, 1997
SCANNER UNIT
6.2.5 SCANNER H.P. SENSOR
[A]
[B]
G405R507.cdr
1. Remove the exposure glass and upper rear cover. (See the Outer Covers and Exposure Glass sections.) 2. Remove the scale bracket [A] (1 screw) and replace the scanner H.P. sensor [B] (1 connector).
6-7
Replacement Adjustment
SCANNER UNIT
11 August, 1997
6.2.6 SCANNER MOTOR
[B] [C]
[A]
G405R508.cdr
1. Remove the exposure glass (see the Outer Covers and Exposure Glass sections). 2. Remove the lens covers (see Lens Covers). 3. Remove the scanner frames (see Scanner Frames) 4. Disconnect the harness [A]. 5. Remove the tension spring [B]. 6. Remove the motor/bracket assembly [C] (2 screws). 7. Secure the new motor with the tension spring.
6-8
17 July, 1997
SCANNER UNIT
6.2.7 SCANNER WIRE
[A]
[B]
[C]
G405R510.CDR
1. Remove the exposure glass (see the Outer Covers and Exposure Glass sections). 2. Remove the lens covers (see Lens Covers). 3. Remove the scanner frames (see Scanner Frames). 4. Remove the hook [A] securing the 1st scanner and remove the 1st scanner. 5. Remove the spring [B]. 6. Loosen the screw [C] securing the wire tension bracket. Loosen the other screw on the opposite side. 7. Remove the scanner wire.
Replacement Adjustment
6-9
SCANNER UNIT
11 August, 1997
[A]
G405R509.CDR
Á Ã Ç Ä
ÂÅ Æ À
G405R523.CDR
8. Wind the new scanner wire on the pulley in the correct direction as shown in illustration À. 9. Wind the end of the new wire with the ball as shown in illustrations Á - Ã. 10. Wind the end of the new wire with the ring as shown in illustrations Ä - Æ. 11. Secure the wire tension bracket screw, with the wire tension spring pulled as shown in illustration Æ. 12. Install the 1st scanner and adjust its position with the scanner positioning tools (P/N A0069104) [A]. Then clamp the 1st scanner with the scanner positioning hook as shown in illustration Ç. 13. Remove the positioning tools. After sliding the scanner to the left and right several times, re-set the scanner positioning tools and re-check the clamp position and wire tension bracket position again. 14. Test the scanner using the book mode free run (See Service Tables Demonstration Mode).
6-10
17 July, 1997
ADF
6.3 ADF
6.3.1 ORIGINAL FEED UNIT/SEPARATION ROLLER
[A]
G405R526.CDR
1. Open the DF feed cover. 2. Remove the original feed unit [A], as shown.
[B]
[C]
G405R532.CDR
NOTE: When reinstalling the original feed unit, make sure that the pin on the end of the shaft [B] fits into the slot in the drive shaft [C] properly as shown.
6-11
Replacement Adjustment
ADF
11 August, 1997
[E]
[D]
G405R528.CDR
G405R527.CDR
[F]
[G]
G405R530.CDR
3. Remove the separation roller holder [D]. 4. Remove the separation roller [E]. NOTE: When reinstalling the separation roller, make sure the drive shaft [F] fits into the hole in the separation roller [G] properly as shown.
6-12
17 July, 1997
ADF
6.3.2 ADF REMOVAL
[B]
[A]
G405R504.CDR
1. Turn off the machine and disconnect the power cable. 2. Remove the PCB case's 5 screws, then pull out the PCB case [A] until it stops. 3. Remove the ADF [B] (1 connector and 2 screws).
6-13
Replacement Adjustment
ADF
11 August, 1997
6.3.3 DF COVER REMOVAL
[B] [C]
[A]
G405R512.CDR
1. Open the DF feed cover. 2. Remove the DF front cover [A] (3 screws). 3. Remove the original table [B] (1 screw). 4. Remove the DF rear cover [C] (5 screws).
6-14
17 July, 1997
ADF
6.3.4 ORIGINAL SET SENSOR AND WIDTH SENSORS
[A] [C] [E] [F] [D] [B]
G405R511.CDR
1. Open the DF feed cover. 2. Remove the original feed unit (see Original Feed Unit/Separation Roller).
Replacement Adjustment
3. Remove the DF front cover, original table and DF cover (see DF Cover Removal). 4. Remove the entrance guide [A] (3 screws). 5. Remove the sensor bracket [B] with sensors (4 screws). 6. Replace the following sensors. Original Set Sensor [C] Original Width Sensor 1 [D] Original Width Sensor 2 [E] Original Width Sensor 3 [F]
6-15
ADF
11 August, 1997
6.3.5 DF FEED COVER OPEN ANS DF POSITION SENSORS
[B] [A]
G405R513.CDR
1. Remove the DF rear cover (see DF Cover Removal). 2. Replace the following sensors. DF Feed Cover Open Sensor [A] (1 connector). DF Position Sensor [B] (1 connector).
6-16
17 July, 1997
ADF
6.3.6 DF FEED MOTOR/DF DRIVE PCB
[B] [A] [C] [D]
G405R524.CDR
1. Remove the DF rear cover. (See DF Cover Removal). 2. Remove the DF drive PCB [A] (all connectors and 4 screws). 3. Remove the tension spring [B]. 4. Remove the DF feed motor [C] (1 connector and 2 screws). NOTE: When reinstalling the DF feed motor, be sure to position the spacer [D] and secure the motor in position with the tension spring.
Replacement Adjustment
6-17
ADF
11 August, 1997
6.3.7 DF FEED CLUTCH AND DF PICK-UP SOLENOID REPLACEMENT
[B]
[C]
[A]
G405R514.CDR
1. Remove the DF rear cover (see DF Cover Removal). 2. Replace the following: · DF Pick-up Solenoid [A] (2 screws, 1 connector) · DF Feed Clutch [B] (2 E-rings, 1 connector) NOTE: When reinstalling the DF feed clutch, be sure to position the bushing [C] as shown.
6-18
17 July, 1997
ADF
6.3.8 REGISTRATION SENSOR REPLACEMENT
[D] [C]
[E]
[F]
[B]
[G]
[A]
G405R515.CDR
[I] [H] H]
G405R525.CDR
1. Remove the original feed unit [A]. 2. Remove the front cover. 3. Remove the DF feed cover [B] (1 screw). 4. Remove the front stay [C] (2 screws). 5. Remove the transport guide [D] (2 screws). 6. Remove the original exposure guide [E] (2 screws). 7. Remove the spring plate [F] (1 screw). 8. Replace the registration sensor [G] (1 screw, 1 connector). NOTE: When reinstalling the DF feed cover [H], make sure it is in position under the sensor bracket [I] as shown.
6-19
Replacement Adjustment
OTHERS
11 August, 1997
6.4 OTHERS
6.4.1 SIU AND SCU BOARDS
[B]
[C]
[D]
[E] [A]
G405R501.cdr
1. Turn off the machine and disconnect the power cable. 2. Disconnect the SCSI cable and terminator. 3. Remove the PCB case's 5 screws, then pull out the PCB case [A] until it stops. 4. Remove the rear cover [B] (5 screws and the DF cable holder). 5. Remove the SIU board assembly [C] (1 connector and 6 screws). 6. Remove the SCU board assembly [D] (all connectors and 7 screws). 7. Put the EEPROM (IC4) [E] from the old SCU on the new SCU. 8. Reassemble the machine.
6-20
17 July, 1997
OTHERS
6.4.2 PSU
[A]
[B] [E]
G405R519.CDR
[C]
[D]
G405R520.CDR
2. Pull out the PCB case until it stops (see SIU/SCU Board Removal). 3. Remove the rear cover (see SIU/SCU Board Removal). 4. Disconnect all connectors from the SCU board except for the PSU connector [A] (2 clamps and 5 connectors). 5. Place the rear side of the scanner on a stand [B] (30 mm [1.2 ins] height) to tilt the machine as shown. 6. Lift the drawer a little to release it from the drawer stopper. 7. Slide out the PCB case carefully and put it on the table. 8. Remove the PSU cover [C] (4 screws). 9. Release the main switch [D] from the drawer. 10. Remove the PSU [E] (1 connector and 6 screws). NOTE: When reinstalling the main switch, position it correctly, as shown.
6-21
Replacement Adjustment
1. Turn off the machine and disconnect the power cable.
OTHERS
11 August, 1997
Step 1
G405R522.CDR
Step 2
G405R521.CDR
NOTE: When reinstalling the PCB case, be sure to the position the drawer guide as shown.
6-22
17 July, 1997
ERROR INDICATION
7. TROUBLESHOOTING
7.1 ERROR INDICATION
When an error is detected in normal usage mode (DIP switches 5 through 8 are off), the error is indicated by the combination of four LEDs at the front of the scanner. If a system error occurs, details on the type of system error can be checked using the self diagnostic mode (DIP switches 5, 6, 7, 8 : off, on, off, on). The LED indications in each mode are as shown in the tables below.
7.1.1 NORMAL USAGE MODE INDICATION
Conditions Contents Document in ADF LED indication Power Busy Document on (Green) set (Green) (Green) On On On Error (Red) On
Initializing
Idle
Overall machine check ADF mode SADF mode
No Yes No
On On On On On On On
-On --On On --
-On Blink On -On --
------On
Scanning User recoverable error
Yes No Yes ADF is lifted up or ADF cover is open Document jam Document misfeed See the next page
System error
On On Blinking
--Blinking
Blinking On Blinking
On On Blinking
Troubleshooting
On = LED on, Blinking = LED Blinking, -- = LED off
7-1
TROUBLESHOOTING PROCEDURES
11 August, 1997
7.1.2 SELF DIAGNOSTIC MODE INDICATION
Contents Power on (Green) Blinking Blinking Blinking LED indication Busy Document (Green) set (Green) --Blinking On Blinking Blinking Error (Red) -On On
Memory error Lamp error *1 Home position error
On = LED on, Blinking = LED Blinking, -- = LED off *1: Lamp error is not checked during power on initialization, but it is checked just before scanning or in the self diagnostic mode.
7.2 TROUBLESHOOTING PROCEDURES
There are two types of problem: · User recoverable error persisting even when the user takes the appropriate action · System error Check each possible cause and correct the abnormality.
7.2.1 PERSISTENT USER RECOVERABLE ERROR
1. ADF Lifted Up, ADF Cover Open Symptom: The error remains even if the ADF and ADF cover are set properly.
Detection Method: The CPU detects that the DF cover open or the DF position sensor is inactive. · The DF cover open sensor is defective. · The DF position sensor is defective. · The DF cover open sensor actuator (on the cover) is defective. · The DF position sensor actuator is defective. · The DF drive PCB is defective. · The SCU is defective. · The harness between each sensor and the DF drive PCB is damaged. · The harness between the DF drive board and the SCU is damaged.
Possible Cause:
Do the sensor test to check if the DF cover open and DF position sensor are defective or not. Refer to the Service Tables section for how to do this test.
7-2
17 July, 1997
TROUBLESHOOTING PROCEDURES
2. Document Jam Symptom:
· The jam indication persists even there is no paper in the ADF paper path. · Frequent jams · The CPU detects that the registration sensor is active when the ADF and the ADF cover is set properly. · The CPU does not detect a change in the registration sensor signal at the proper time. · A torn document remains at the registration sensor position. · The registration sensor is defective.*1 · The DF drive PCB is defective · The harness between the registration sensor and the DF drive PCB is damaged · The harness between the DF drive PCB and the SCU is damaged. · The SCU is defective · The document feed motor is defective. · The harness between the document feed motor and the DF drive PCB is damaged. · The platen is not set properly.
Detection Method:
Possible Cause:
*1: Do the sensor test to check if the sensor is defective or not (refer to the Service Tables section). The demonstration mode may be helpful for isolating the problem (refer to the Service Tables section).
7-3
Troubleshooting
TROUBLESHOOTING PROCEDURES
11 August, 1997
3. Document misfeed Symptom: Frequent misfeeds.
Detection Method: The CPU does not detect a change in the registration sensor signal at the proper time. · · · · · · · The document pick-up roller is worn out. The document feed belt unit is not set properly. The document feed belt is worn out. The registration sensor is defective. The DF drive board is defective. The SCU is defective. The harness between the registration sensor and the DF drive board is damaged. · The harness between the DF drive board and the SCU is damaged. · A torn document remains in the paper path between the pick-up roller and the registration sensor.
Possible Causes:
The demonstration mode may be helpful for isolating the problem (refer to the Service Tables section).
7-4
17 July, 1997
TROUBLESHOOTING PROCEDURES
7.2.2 SYSTEM ERROR
1. Memory Error Symptom:
System error is indicated in the normal usage mode and memory error is indicated in the self diagnostic mode. The CPU performs a sum check on the ROM and a read/write check on the RAM. The SCU is defective.
Detection Method:
Possible Cause:
2. Lamp Failure Symptom:
System error is indicated in the normal usage mode and lamp error is indicated in the self diagnostic mode. The CPU checks if the CCD output is within the specified level during the white plate scan. Note that this check is not made during power on initialization, but just before image scanning or in the self diagnostic mode. Perform the self diagnostic mode to confirm the symptom (refer to the Service Tables section). · · · · The xenon lamp is defective. The lamp inverter is defective. The SCU is defective. The harness between the inverter and the SCU is damaged. · The 1st, 2nd, or 3rd mirror is dirty or out of position. · The SBU is defective.
Detection Method:
Possible Cause:
7-5
Troubleshooting
TROUBLESHOOTING PROCEDURES
11 August, 1997
3. Home Position Error Symptom: The scanner cannot return the 1st carriage to the home position within the specified period.
Detection Method: The CPU does not detect the signal change within the specified period while moving the carriage back and forth. · The home position sensor is defective. · The harness between the home position sensor and the SCU is damaged. · The SCU is defective. · The carriage drive wire is not fixed to the 1st carriage properly. · The scanner motor is defective.
Possible Cause:
7-6
17 July, 1997
ELECTRICAL COMPONENT DEFECTS
7.3 ELECTRICAL COMPONENT DEFECTS
7.3.1 SENSORS
Component (Symbol) Feed Cover Open (S1) CN 140-A8 (DF DRIVE) Condition Open Shorted DF Position (S2) 140-A5 (DF DRIVE) Open Shorted Original Width 1 (S3) Original Width 2 (S4) Original Width 3 (S5) Original Set (S6) 140-B8 (DF DRIVE) 140-B5 (DF DRIVE) 140-B2 (DF DRIVE) 140-B11 (DF DRIVE) Open Shorted Open Shorted Open Shorted Open Shorted Symptom The error indicator does not light even if the feed cover is opened. The error indicator lights even if the feed cover is closed. The error indicator does not light even if the ADF is lifted up. The error indicator lights even if the ADF is in position. The CPU cannot detect the original width properly. The CPU cannot detect the original width properly. The CPU cannot detect the original width properly. The CPU does not detect an original when it is placed in the tray. The CPU detects the original set condition even if there is no original in the tray. The jam indicator lights even if there is no paper. The jam indicator will light whenever a scan is made in the DF mode. All LEDs will blink when the machine performs power on initialization.
Troubleshooting
Registration (S7)
140-B14 (DF DRIVE)
Open Shorted
Scanner H.P (S8)
9-A2 (SCU)
Open Shorted
7-7
BLOWN FUSE CONDITIONS
11 August, 1997
7.4 BLOWN FUSE CONDITIONS
Rating 100 - 120 V 220 - 240 V Power Supply Board FU1 3.15 A/125 V 3.15 A/250 V FU2 5 A/125 V 5 A/250 V FU3 4 A/125 V 4 A/250 V Fuse Symptom when turning on the main switch
FU4 FU5 SIU F1
1 A/125 V 1 A/125 V
1 A/250 V 1 A/250 V
No response. No response. All LEDs will blink a few minutes after the machine is turned on. The scanner drive motor and the xenon lamp are not driven. All LEDs will blink when the machine performs shading before scanning. All LEDs will blink when the machine performs shading before scanning. Power for the terminator is not supplied.
1.6 A/250 V
1.6 A/250 V
7-8
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
Si nal g GND GND GND GND GND GND GND GND GND GND GND GND NC GND GND GND GND GND GND GND GND GND GND GND GND /OB0 /OB1 /OB2 /OB3 /OB4 /OB5 /OB6 /OB7 /DBP GND GND GND TERMPWR GND GND /ATN GND /BSY /ACK /RST /MSG /SEL /C/D /REQ /I/O Si nal g GND GND GND GND GND GND GND GND GND GND GND GND NC GND GND GND GND GND GND GND GND GND GND GND GND /DB0 /DB1 /DB2 /DB3 /DB4 /DB5 /DB6 /DB7 /DBP GND GND GND TERMPWR GND GND /ATN GND /BSY /ACK /RST /MSG /SEL /C/D /REQ /I/O
SIU
GND GND +5VE +5VE RESERVED /RSSBC /INTSBC /SIUINST PD1 RESERVED RESERVED GND CPTXD RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED GND /CSEXT /HWRE AE0 AE2 AE4 AE6 AE8 AE10 AE12 AE14 DE8 DE10 DE12 DE14 /INTEXT RESERVED OLSYNC RESERVED EXTXD RESERVED VTYPE OLSYNC OFGATE OVDT0 OVDT2 OVDT4 OVDT6 RESETO GND GND GND GND +5VE +5VE RESERVED /RGEB /INTSCSI RESERVED PD2 RESERVED SYSCLKO GND CPRXD RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED GND /RDE /WAIT AE1 AE3 AE5 AE7 AE9 AE11 AE13 AE15 DE9 DE11 DE13 DE15 GND PHICLK GND RESERVED EXRXD RESERVED OVCLK OLGATE RESERVED OVDT1 OVDT3 OVDT5 OVDT7 /EXINST GND GND +24V +24V ASOU /ASOU BSOU /BSOU
GND GND +5VE +5VE GND OSVCLK GND OEVDT0 OEVDY2 OEVDT4 OEVDT6 OSVDT6 GND OIPCK GND RESERVED /CSIPU /HWRE AE1 AE3 GND GND RESERVED DE8 DE10 DE12 DE14 GND FVCLK GND FLGATE FVDT0 FVDT2 FVDT4 FVDT6 RESERVED RESETO GND GND GND GND GND +5VE +5VE OSLSYNC OSFGATE OSLGATE OEVDT1 OEVDT3 OEVDT5 OEVDT7 OSCVDT7 GND PHSHO GND RESERVED /RDE AE0 AE2 AE4 GND GND RESERVED DE9 DE11 DE13 DE15 GND FLSYNC FFGATE RESERVED FVDT1 FVDT3 FVDT5 FVDT7 RESERVED /IPINST GND GND GND NC /RDSYNC GND /CLKO GND DCGT /PWIND /AEMODE GND DADI GND DACLK GND DALD GND AD7 AD6 GND AD5 AD4 GND AD3 AD2 GND AD1 AD0 GND AGC0 AGC1 GND AGC2 AGC3 GND +12V +12V +12V +12V +12V +12V GND -12V -12V -12V GND +5V +5V +5V +5V +5V +5V
Point-to-Point Diagram Model: V20 SCANNER
Revision 1.0 - 97.7.17 Symbol Table
AC Line DC Line < s t [ ] [ A] > Signal Direction Pulse Signal Active High Active Low Voltage Analog Signal
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1718 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 4142 43 44 45 46 47 4849 50 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 2223 24 25 26 27 28 29 3031 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 3233 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1718 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 4142 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 6566 67 68 69 70 71 72 7374 75 76 77 78 79 80 8182 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99100
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 3233 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80
1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 4142 43 44 45 46 47 48 49 50 51 52 53 54 55 56 5758 59 60 61 62 63 64 65 66 67 68 69 70 71 72 7374 75 76 77 78 79 80 8182 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99100
CN2 CN1 CN3 Scanner Motor
CN1
CN3
IPU
CN4
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
SCU
1 2 3 4 5 6
[w24] [w24] [w24] [w24]
CN7 CN5
CN1
SBU
DF Feed clutch
+24VM /DFCLO [w24] +24VM +24V NC A /A B /B +24V /DFFEEDO N.C. N.C.
DF Feed Motor
+24VM +24VM +24VM /DFCLO /DFFEEDO [w24] /DFSTMPO [w24] Not used Not used Not used PGND PGND +5VB +5V Not used +5V Not used GND DF Cover Open [w5] GND /DFSET [w5] /DFLIFT [w5] /DFINST [w24] Original Width-3 [w5] Not used Not used Not used Original Width-2 [w5] [w5] DM4 DFREGST [v5] [w5] DM3 Original Width-1[w5] [w5] DM2 /DFREF [w5] DM1 [w5]
A1 A2 A3 A8 A9 A10 A15 A16 A17 B15 B16 B17 B3 B14 B4 B13 B1 B12 B2 B11 B10 A11 B9 A12 B8 A13 B7 A4 B6 A5 B5 A6 A14 A7
1 2 3 4 5 6 7 8 9 10 11
1 2
CN130 CN160 CN150
CN110
3 4 5 6 7 8 9 1 2
DF Pick-up Solenoid
DF Cover Sensor
Paper Feed Cover Sensor
GND /DFLIFT [w5] +5V GND /DFKS [w5] +5V
Width Sensor 3
Width Sensor 2
Width Sensor 1
Document Cover Sensor
Registration Sensor
[w5] [w5] [w5] [w5]
1 2 3 4 5 6
GND /DFPS3 [w5] +5V GND /DFPS2 [w5] +5V GND /DFPS1 [w5] +5V GND /DFSET [w5] +5V +5V DFREGST [v5] GND
A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 B11 B12 B13 B14 B15
ADF
A1 B1 A2 B2 A3 B3 A4 B4 A5 A6 B6 A7 B7 A8 B8 A9 B9 A10 B10 A11 B11 A12 B12
Noise Filter
FU3 FU4 FU5 Converter AC IN
FG
Main Switc h
HP Sensor Scanner Lamp Lamp Stabilizer
GND HPS [v5] +5V +24V GND /XEONO [v24] N.C. N.C. N.C.
GND POWER BUSY /DSETO ERROR +5V GND GND GND CPTXD CPRXD +5V +5V
SDP
AC Inlet
1 2
CN2
FU1 FU2 FU3 FU4 FU5
115V 125V, 3.15A 125V, 5A 125V, 4A 125V, 1A 125V, 1A
220V 250V, 250V, 250V, 250V, 250V,
3.15A 5A 4A 1A 1A
CN120
+5V +5V GND GND +24V +24V GND GND +12V GND -12V
1 2 3 4 5 6 7 8 9 10 11
1 2 3 4 5 6 7 8 9 10 11
FU2
FU1 AC IN
CN6
CN2
CN140
PSU
1 2 3 4 5 6
CN1
1 2 3 4 5 6 7 8 9
CN8
7 8 9 10 11 12 13
CN9
17 July, 1997
OVERVIEW
IPU (IMAGE PROCESSING UNIT)
OVERVIEW
The IPU processes Photo/Text separation and Binary conversion automatically. · Automatic Photo/Text Separation: To improve image reproduction of Photo/Text documents, text and photo areas are distinguished automatically and the appropriate image processing is done on them. · Automatic Binary Conversion (Dynamic Thresholding): To improve image reproduction of text which is printed in various densities, the density is detected automatically and the threshold level is adjusted accordingly.
BLOCK DIAGRAM
FIFO SRAM
Multi-value Video Data
DIB
GTB
IPB
ZMB
IPU Video Data
DOB Binary Video Data BIB
CPU
CIB
Reference Clock
TGB +5V GND Others
G405O500.vsd
The IEU consists of the following 8 blocks.
DIB (Video Data Input Block) The DIB has the following functions: controlling the input of multi-value (8 bit) video data, generating the line reset signal and the page reset signal, and transmitting multi-value video data to the GTB. BIB (Binary Video Data Input Block) The BIB has the following functions: controlling the binary video input data, adjusting the delay time for each pixel, and transmitting multi-value video data to the DOB.
1
BLOCK DIAGRAM
11 August, 1997
GTB (Gamma Translation Block) The GTB does the following: gamma conversion using an internal 256 byte SRAM, grayscale conversion of multi-value video data (8-bit to 6-bit), and transmission of multi-value video data to the IPB. IPB (Image Processing Block) The IPB has the following functions: MTF correction, averaging of input data, edge extraction, gray level separation, determination of photo and text areas, automatic binary processing, erasure of single black dots, unevenness correction, interfacing with the FIFO memory, and transmission of data to the ZMB. ZMB (Zooming & Mirroring Block) The ZMB has the following functions: changing magnification, mirroring images, interfacing with SRAM, and data transmission to the DOB. DOB (Video Data Output Block) The DOB has the following functions: generating text/photo separation data, black/white image inversion, serial/parallel conversion, MSB/LSB reversal, and video data transmission. CIB (CPU Interfacing Block) The CIB interfaces with the CPU and controls register use by other blocks. TGB (Timing Generator Block) The TGB generates all timing signals for all blocks.
2