Oki OKIFAX 5750 Maintenance Manual page 830

3.7.12 G3 mode communication NG
communication NG
Able to communicate
During protocol signal
sending or receiving, sine
wave or modulated sine wave
output is provided between
pin 4 and pin 1 of CN1 and
between pin 2 and pin 1
Waveform of pins 11, 15,
13 of IC4 are similar to
Waveform of pins 11, 15,
12 of IC4 are similar to
Figure 3.7-12.
Replace G4A board.
41285901TH Rev.3
12: G3 mode
NG
at G4 mode
OK
No
of CN1.
Yes
No
Figure 3.7-11.
Yes
No
Yes
Check No. 11 item
Check M76 board
Replace IC4
Replace IC2
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