Fip1.20 Inoperative Keypad - Oki B6200 Maintenance Manual

FIP1.20 Inoperative Keypad

Step
Possible causative parts:
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 <=> P/J28-4 on HVPS/MCU,
3.3VDC?
Checking FCC ASSY ESS for continuity
Disconnect P/J28 from HVPS/MCU.
5 Are the following continuous normally?
P/J28-5 <=> P/J280-22
P/J28-4 <=> P/J280-23
Check
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Chapter 1 Troubleshooting
Yes
Go to step 2. Go to step 4.
Go to step 3. HARNESS ASSY
End of work HVPS/MCU.
(RRP12.10)
Go to step 5. HVPS/MCU.
(RRP12.10)
Replace
PWBA ESS. FCC ASSY ESS.
(PL12.1.13) (PL12.1.16)
No
Replace
PANEL.
Replace
Replace
Replace