Oki OKIFAX 5750 Maintenance Manual page 353

across CN3-19, 20 (R) and
Receive signal appears
across CN11-A22 (R) of
MCNT (R76) board?
Yes
Replace C34 or H34 Board.
Signal route:
CNI01-8→IC204-2, 1
→IC204-6, 7→IC202-11
41285901TH Rev.3
A
RX (Receiver)
The error counter of LCD
stops counting up?
No
Receive signal appears
across L1 and L2?
Yes
Receive signal appears
CN3-7 (GND) of WN5
board?
Yes
No
Replace MCNT (R76) Board.
Signal route:
CN12-A6, B6→CN11-A22
Return to section 7.1
Yes
RX End
No
Check the line.
No
Yes
Replace NCU Board.
Yes
Solved?
No
Replace MCNT (R76) Board.
Signal route:
CN1-3, 4→RL1-8, 5→
T1-1, 3→T1-2, 6→
CN3-19, 20 (R)
Possible cause:
CML signal
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