Oki B6500

1 – 93
Chapter 1 Troubleshooting
FIP3.12 S/W REAR COVER
Step Check Yes No
Possible causes:
S/W REAR COVER (PL23.1.18)
HARNESS ASSY REAR COVER (PL23.1.29)
PWBA OCT (PL23.1.22)
HARNESS ASSY OCT2 (PL23.1.25)
HVPS/MCU (PL12.1.19)
LVPS (PL12.1.5)
HARNESS ASSY OCT1 (PL12.1.26)
1
Checking S/W REAR COVER for continuity (1)
Remove S/W REAR COVER.
Is J740-2 and J740-1 continuous, when S/W REAR
COVER is pushed, and cut when released?
Go to step 2.
Replace S/W
REAR COVER.
2
Checking HARNESS ASSY REAR COVER for continu-
ity
Remove HARNESS ASSY REAR COVER.
Is there continuity between J74 and J740?
Go to step 3.
Replace S/W
REAR COVER.
3
Checking HARNESS ASSY OCT2 for continuity
Disconnect P/J70 from PWBA OCT.
Remove HARNESS ASSY OCT2.
Is there continuity between J70 and J3070?
Go to step 4.
Replace HAR-
NESS ASSY
OCT2.
4
Checking HARNESS ASSY OCT1 for continuity
Remove HARNESS ASSY OCT1.
Is there continuity between J30 and J3070?
Go to step 5.
Replace HAR-
NESS ASSY
OCT1.
5
Checking S/W REAR COVER (2)
Remove EP CARTRIDGE.
Is the voltage across P/J30-4(+) and P/J30-3(-) on
HVPS/MCU, 3.3 VDC?
Go to FIP3.8
PWBA OCT.
Go to step 6.
6
Checking HVPS/MCU for continuity
Disconnect P/J30 from HVPS/MCU.
Is there continuity between P30-4 and P11-16?
Go to FIP1.24
LVPS.
Replace HVPS/
MCU. (RRP12.10)