WorkCentre Pro 423/428
2-134
CHAPTER 2 TROUBLESHOOTING
03/02
Level 2 Troubleshooting
OPTION LVPS +12VDC POWER FIP (BSD 19.1)
Is the v12 VDC between the OPTION MOTHER PWB
J320-5(+) and GND(-)?
Y
N
Is the v12 VDC between the OPTION LVPS J507-
5(+) and GND(-)?
Y
N
Is +12 VDC WIRE normal (no short circuit with the
FRAME)?
Y
N
Repair the short circuit.
Is the voltage 100 VAC between the OPTION LVPS
J3C-4(+) and J3C-3(-)?
Y
N
Is the voltage 100 VAC between the
OPTIONJ11-1(+) and J11-2(-)?
Y
N
Is the voltage 100 VAC between the
POWER UNIT J1-2(+) and J1-5(-)?
Y
N
Replace the POWER UNIT. (PL7.1)
Check between the POWER UNIT and
OPTION relay connector for an open wire
or poor contact.
Check between the OPTION relay connector
and OPTION LVPS for an open wire or poor
contact.
Replace the OPTION LVPS. (PL9.5)
Check between the OPTION LVPS and MF MAIN PWB for
an open wire or poor contact.
Check between the OPTION MOTHER PWB and the
corresponding part for an open wire or poor contact.
OPTION LVPS +5VDC POWER FIP (BSD 19.1)
Is the v5 VDC between the OPTION MOTHER PWB
J320-1(+) and GND(-)?
Y
N
Is the v5 VDC between the OPTION LVPS J507-
1(+) and GND(-)?
Y
N
Is +5 DC WIRE normal (no short circuit with the
FRAME)?
Y
N
Repair the short circuit.
Is the voltage 100 VAC between the OPTION LVPS
J3C-4(+) and J3C-3(-)?
Y
N
Is the voltage 100 VAC between the OPTION
relay connector J11-1(+) and J11-2(-)?
Y
N
Is the voltage 100 VAC between the
POWER UNIT J1-2(+) and J1-5(-)?
Y
N
Replace the POWER UNIT. (PL7.1)
Check between the POWER UNIT and
OPTION relay connector for an open wire
or poor contact.
Check between the OPTION relay connector
and OPTION LVPS for an open wire or poor
contact.
Replace the OPTION LVPS. (PL9.5)
Check between the OPTION LVPS and MF MAIN PWB for
an open wire or poor contact.
Check between the OPTION MOTHER PWB and the
corresponding part for an open wire or poor contact.
OPTION LVPS –12VDC POWER FIP (BSD 19.1)
Is the voltage -12 VDC between the OPTION MOTHER PWB
J320-6(+) and GND(-)?
Y
N
Is the voltage -12 VDC between the OPTION LVPS J507-
6(+) and GND(-)?
Y
N
Is -12 VDC WIRE normal (no short circuit with the
FRAME)?
Y
N
Repair the short circuit.
Is the voltage 100 VAC between the OPTION LVPS
J3C-4(+) and J3C-3(-)?
Y
N
Is the voltage 100 VAC between the
OPTIONRelay connector J11-1(+) and J11-2(-)?
Y
N
Is the voltage 100 VAC between the
POWER UNIT J1-2(+) and J1-5(-)?
Y
N
Replace the POWER UNIT. (PL7.1)
Check between the POWER UNIT and
OPTION relay connector for an open wire
or poor contact.
Check between the OPTION relay connector
and OPTION LVPS for an open wire or poor
contact.
Replace the OPTION LVPS. (PL9.5)
Check between the OPTION LVPS and MF MAIN PWB for
an open wire or poor contact.
Check between the OPTION MOTHER PWB and the
corresponding part for an open wire or poor contact.
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...
Page 244: ......
Page 273: ...CHAPTER 4 DISASSEMBLY ASSEMBLY AND ADJUSTMENT...
Page 274: ......
Page 329: ...CHAPTER 5 PARTS LIST...
Page 330: ......
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...
Page 457: ......
Page 476: ...CHAPTER 8 ACCESSORIES...
Page 477: ......
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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