Fip1.20 Inoperative Keypad - Oki B6500 Service Manual

FIP1.20 Inoperative Keypad

Step
Possible causes:
OPERATION PANEL (PL1.1.1)
HARNESS ASSY PANEL (PL1.1.10)
HVPS/MCU (PL12.1.19)
LVPS (PL12.1.5)
Checking 3.3 VDC power line
1 Is the voltage across the harness of OPERATION
PANEL, 3.3 VDC?
Checking OPERATION PANEL for continuity (1)
2
Is every cable of HARNESS ASSY PANEL continuous?
Checking OPERATION PANEL (2)
3 Is the display stable, after replacing OPERATION
PANEL? (RRP1.4)
Checking the power to OPERATION PANEL
4 Is the voltage across P/J28-5(+) and P/J28-4(-) on
HVPS/MCU, 3.3VDC?
Checking FCC ASSY ESS for continuity
Disconnect P/J28 from HVPS/MCU.
5 Is there continuity between
P/J28-5 and P/J280-22?
P/J28-4 and P/J280-23?
Check
1 – 37
Chapter 1 Troubleshooting
Yes
Go to step 2. Go to step 4.
Replace HAR-
Go to step 3. NESS ASSY
Replace HVPS/
End of work
MCU. (RRP12.10)
Replace HVPS/
Go to step 5.
MCU. (RRP12.10)
Replace FCC
Replace PWBA
ESS. (PL12.1.13)
No
PANEL.
ASSY ESS.
(PL12.1.16)