Oki B6500 Series, Service Manual

Page: 80 / 616

1 – 60
Chapter 1 Troubleshooting
FIP1.39 CLUTCH ASSY PH
Step Check Yes No
Possible causes:
CLUTCH ASSY PH (PL5.1.21, PL7.1.20)
HARNESS ASSY TRAY1 (PL5.1.37)
HARNESS ASSY TRAY2 (PL7.1.36)
HARNESS ASSY CHUTE (PL12.1.17)
HVPS/MCU (PL12.1.19)
LVPS (PL12.1.5)
1
Checking HARNESS ASSY CHUTE for continuity
Disconnect P/J24 from HVPS/MCU.
Is there continuity between
J24-13 and J245-6?
J24-12 and J245-7?
J24-5 and J248-1?
J24-4 and J248-2?
Go to step 2.
Replace HAR-
NESS ASSY
CHUTE.
2
Checking HARNESS ASSY TRAY1 and TRAY2 for
continuity.
Remove CLUTCH ASSY PH.
Disconnect P/J245 or P/J248.
Is there continuity between
P/J245-8 and P/J242-1?
P/J245-7 and P/J242-2?
P/J248-5 and P/J247-1?
P/J248-4 and P/J247-2?
Go to step 3.
Replace HAR-
NESS ASSY
TRAY1 or TRAY2.
3
Checking the resistance of CLUTCH ASSY PH
Is each resistance of the wire wound resistor between
P/J242-1 and P/J242-2, and
P/J247-1 and P/J247-2 of CLUTCH ASSY PH, 172
ohm +/-10% (at 20 °C)?
Go to step 4.
Replace CLUTCH
ASSY PH.
(RRP5.6, 7.5)
4
Checking HVPS/MCU for continuity
Disconnect P/J24 and P/J10 from HVPS/MCU.
Is there continuity between
J24-12 and J10-1?
J24-4 and J10-1?
Go to FIP1.24
LVPS.
Replace HVPS/
MCU. (RRP12.10)