Oki OKIFAX 5750 Maintenance Manual page 794

3.1.11 PC I/F does not operate correctly
11: PC/IF does not
operate correctly
No
Pin 11 of CN17
(BSY-P) is near 0V.
Yes
No
Pin 4 of IC30 is near 0V.
Yes
Replace IC30. Replace IC2.
Waveform of pin 1 of
No
CN17 (STB-N) is similar to
Figure 3.1-18
Yes
Check CN17 connection.
Signal output waveforms of
No
pins 46, 44 of IC30 are similar
to Figure 3.1-17 (IC30-46:
ACK-N, IC30-44: FLT-N)
Yes
Signal input waveforms of
No
pins 3, 5 of IC30 are similar
to Figure 3.1-17 (IC30-3:
ACK-N, IC30-5: FLT-N)
Yes
Check CN17 connection. Replace IC30. Replace IC2.
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41285901TH Rev.3