Led Test - Oki B 4100 Maintenance Manual

7.2.11 LED Test

Start
Perform LED TEST.
(See Chapter 6.7)
All LEDs light?
Yes
End
40055101TH Rev.4
No
Any LED does not light?
Yes (One LED or
some LEDs light.)
ALARM LED lights?
Yes
DARK LED lights?
Yes
NORMAL LED lights?
Yes
LIGHT LED lights?
Yes
STD LED lights?
Yes
FINE LED lights?
Yes
EX. FINE LED lights?
Yes
PHOTO LED lights?
Yes
Checking Points:
No (No LED lights)
1. Check the connection cable.
2. Check the oscillator OSC (OPE).
3. Replace MCNT board.
4. If not solved, replace CPU of
No
No
No
No
No
No
No
No
Check the corresponding
LED(s) on OPE board.
OPE unit.
301 /