Oki OKIFAX 5750 Maintenance Manual page 859

3.9.14 Modem NG
14: Modem NG
Pins 11 and 21 of IC201
No
repeat 5V ON/OFF cyclically
(24.576MHz).
Yes
Replace X201.
Waveforms of pins 16,
No
100 of IC201 are similar
to Figure 3.9-6.
Yes
Pin 16: OE
Replace IC201.
Pin 100: CE
Replace RAM201.
Yes
Modem NG.
No
Replace FLS201.
END
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