03/02
Level 2 Troubleshooting
WorkCentre Pro 423/428
2-117
CHAPTER 2 TROUBLESHOOTING
If Power OFF/ON does not repair, replace the IIT/IPS
PWB.(PL3.1)
U6-95 Memory Error at POWER ON (BSD 3.1A 3.1C
3.3)
If NVM initialization does not repair the error, replace the
MCU/SW PWB(PL7.2), IIT/IPS PWB(PL3.1), and DIMM
PWB(PL7.2) in this order.
U7-31 Inter-system Communication FAIL (BSD
3.1B)
Check between the MCU/SW PWB and IIT/IPS PWB and
between the IIT/IPS PWB and UI PWB for an open wire or poor
contact.
If no problem is found, replace the MCU/SW PWB(PL7.2), UI
PWB(PLXX.X), and IIT/IPS PWB(PL3.1) in this order.
U7-32 Inter-system Communication FAIL (BSD
3.1B)
Check between the MCU/SW PWB and IIT/IPS PWB and
between the IIT/IPS PWB and UI PWB for an open wire or poor
contact.
If no problem is found, replace the MCU/SW PWB(PL7.2), UI
PWB(PLXX.X), and IIT/IPS PWB(PL3.1) in this order.
U7-33 Inter-system Communication FAIL (BSD
3.1B)
Check between the MCU/SW PWB and IIT/IPS PWB and
between the IIT/IPS PWB and UI PWB for an open wire or poor
contact.
If no problem is found, replace the MCU/SW PWB(PL7.2), UI
PWB(PLXX.X), and IIT/IPS PWB(PL3.1) in this order.
U7-34 Inter-system Communication FAIL (BSD
3.1B)
Check between the MCU/SW PWB and IIT/IPS PWB and
between the IIT/IPS PWB and UI PWB for an open wire or poor
contact.
If no problem is found, replace the MCU/SW PWB(PL7.2), UI
PWB(PLXX.X), and IIT/IPS PWB(PL3.1) in this order.
U7-35 Inter-system Communication FAIL (BSD
3.1B)
Check between the MCU/SW PWB and IIT/IPS PWB and
between the IIT/IPS PWB and UI PWB for an open wire or poor
contact.
If no problem is found, replace the MCU/SW PWB(PL7.2), UI
PWB(PLXX.X), and IIT/IPS PWB(PL3.1) in this order.
U7-41 Inter-system Communication FAIL (BSD
3.1A)
Check between the MCU/SW PWB and IIT/IPS PWB for an open
wire or poor contact. If no problem is found, replace the
MCU/SW PWB(PL7.2)and IIT/IPS PWB(PL3.1) in this order.
U7-42 Inter-system Communication FAIL (BSD
3.1A)
Check between the MCU/SW PWB and IIT/IPS PWB for an open
wire or poor contact. If no problem is found, replace the
MCU/SW PWB(PL7.2)and IIT/IPS PWB(PL3.1) in this order.
U7-42 Inter-system Communication FAIL (BSD
3.1A)
Check between the MCU/SW PWB and IIT/IPS PWB for an open
wire or poor contact. If no problem is found, replace the
MCU/SW PWB(PL7.2) and IIT/IPS PWB(PL3.1) in this order.
U7-43 Inter-system Communication FAIL (BSD
3.1A)
Check between the MCU/SW PWB and IIT/IPS PWB for an open
wire or poor contact. If no problem is found, replace the
MCU/SW PWB(PL7.2)and IIT/IPS PWB(PL3.1) in this order.
U7-44 Inter-system Communication FAIL (BSD
3.1A)
Check between the MCU/SW PWB and IIT/IPS PWB for an open
wire or poor contact. If no problem is found, replace the
MCU/SW PWB(PL7.2)and IIT/IPS PWB(PL3.1) in this order.
U7-45 Inter-system Communication FAIL (BSD
3.1A)
Check between the MCU/SW PWB and IIT/IPS PWB for an open
wire or poor contact. If no problem is found, replace the
MCU/SW PWB(PL7.2)and IIT/IPS PWB(PL3.1) in this order.
U8-3 LAMP/CCD Sensor Abnormal (BSD 6.1B 6.2)
Problem factors:
l
CCD PWB defect
l
IIT/IPS PWB defect
l
MCU/SW
PWB
defect
l
EXPOSURE LAMP quantity of light not appropriate
U8-4 LAMP/CCD Sensor Abnormal (BSD 6.1B 6.2)
Problem factors:
l
CCD PWB defect
l
IIT/IPS PWB defect
l
MCU/SW
PWB
defect
l
EXPOSURE LAMP quantily of light not appropriate
U8-5 LAMP/CCD Sensor Abnormal (BSD 6.1B 6.2)
Problem factors:
l
CCD PWB defect
l
IIT/IPS PWB defect
l
MCU/SW
PWB
defect
l
EXPOSURE LAMP quantily of light not appropriate
U8-6 LAMP/CCD Sensor Abnormal (BSD 6.1B 6.2)
Problem factors:
l
CCD PWB defect
l
IIT/IPS PWB defect
l
MCU/SW
PWB
defect
l
EXPOSURE LAMP quantily of light not appropriate
l
Reflector plate dirty or condensed
U9-1 MCU/SW PWB Failure (BSD 3.1C)
If Power OFF/ON does not rsolve the problem, replace the
MCU/SW PWB (PL7.2).
Summary of Contents for WorkCentre Pro 423
Page 2: ......
Page 3: ...WorkCentre Pro 423 428 6HUYLFH 0DQXDO...
Page 6: ......
Page 8: ......
Page 9: ...INTRODUCTION...
Page 10: ......
Page 24: ...WorkCentre 423 428 03 02 INTRODUCTION 14 7 Translation of Warnings...
Page 25: ...CHAPTER 1 SERVICE CALL PROCEDURE...
Page 26: ......
Page 28: ...WorkCentre Pro 423 428 1 2 CHAPTER 1 SERVICE CALL PROCEDURE 03 02 1 1 Trimming...
Page 31: ...CHAPTER 2 TROUBLESHOOTING...
Page 32: ......
Page 76: ...WorkCentre Pro 423 428 2 44 CHAPTER 2 TROUBLESHOOTING 03 02 2 3 Level 2 Troubleshooting...
Page 243: ...CHAPTER 3 IMAGE QUALITY TROUBLESHOOTING...
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Page 273: ...CHAPTER 4 DISASSEMBLY ASSEMBLY AND ADJUSTMENT...
Page 274: ......
Page 329: ...CHAPTER 5 PARTS LIST...
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Page 415: ...03 02 5 2 Parts List WorkCentre Pro 423 428 5 85 CHAPTER 5 PARTS LIST...
Page 416: ...CHAPTER 6 GENERAL...
Page 417: ......
Page 456: ...CHAPTER 7 ELECTRICAL WIRING DIAGRAMS...
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Page 476: ...CHAPTER 8 ACCESSORIES...
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Page 535: ...WorkCentre Pro 423 428 8 58 CHAPTER 8 ACCESSORIES 03 02 8 22 Stamp Kit Red...
Page 536: ...CHAPTER 9 BSD Block Schematic Diagram...
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