Fip2.7 No Recognition Of Option Duplex - Oki B6500 Troubleshooting Manual

FIP2.7 No Recognition of Option Duplex

Step
Possible causes:
HVPS/MCU (PL12.1.19)
HARNESS ASSY LVPS (PL12.1.1)
PWBA DUPLEX (PL21.1.32)
HARNESS ASSY DUP (PL21.1.7)
Checking Option Duplex detection signal (1)
Remove PWBA DUPLEX. (RRP21.5)
Remove HARNESS ASSY DUP.
1 Connect J2750 of HARNESS ASSY DUP to P2750 of
HARNESS ASSY LVPS.
Is the voltage across P2750-5(+) and J2750-6(-),
3.3VDC?
Checking Option Duplex detection signal (2)
2 Is the voltage across P/J27-4(+) and P/J27-3(-) on
HVPS/MCU, 3.3 VDC?
Checking HARNESS ASSY LVPS for continuity
Remove HARNESS ASSY LVPS.
Is there continuity between each of the following?
3 J27-4 and J2750-5
J27-3 and J2750-6
J27-2 and J2750-7
J27-1 and J2750-8
Checking HARNESS ASSY DUP for continuity
Disconnect connectors of HARNESS ASSY DUP.
Is there continuity between each of the following?
4 J2750-3 and J50-8
J2750-4 and J50-7
J2750-5 and J50-6
J2750-6 and J50-5
Check
1 – 76
Chapter 1 Troubleshooting
Yes
Go to step 4. Go to step 2.
Replace HVPS/
Go to step 3.
MCU. (RRP12.10)
Replace HAR-
Go to step 4.
NESS ASSY LVPS.
Replace PWBA
Replace HAR-
DUPLEX.
NESS ASSY DUP.
(RRP21.5)
No