Pc/If Not Operating Correctly - Oki OKIFAX4550 Maintenance Manual

4.2.11 PC/IF not operating correctly

11: PC/IF does not
operate correctly
Pin 11 of CN11
(BUSY-P) is near 0V
Yes
Waveform of pin 1 of
CN11 (STB-N) is similar to
Figure H.8(2/2)
Yes
Signal output waveforms
of pins 44, 46 of IC12 are
similar to Figure H.8(1/2)
(IC12-46: ACK,
IC12-44: FLT)
Yes
Check CN11 connection.
41309401TH Rev.4
No
Pin 45 of IC12 is near 0V
Yes
Replace IC12.
No
Check CN11 connection.
No
Replace IC12.
No
Replace IC2.
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