Sending Ng - Oki OKIFAX4550 Maintenance Manual

4.2.7 Sending NG

7: Sending NG
Call origination is impossible
No
Protocol signal receiving is NG
No
Signals cannot be sent.
During protocol signal sending,
sine wave or modulated sine wave
output is provided between
pins 28 and 29 of IC6
Yes
During protocol signal
sending, sine wave or
modulated sine wave output
is provided at pin 7 of IC10
Yes
Check CN10.
41309401TH Rev.4
Yes
Call origination mode
is (DP or PB)
PB
Yes
During protocol signal receiving,
sine wave or modulated sine wave
input is provided between pins 2
and 3 of IC10
Yes
During protocol signal receiving,
sine wave or modulated sine wave
input is provided at pin 32 of IC6
Yes
No
Replace IC6.
No
DP
Pin 63 of IC2 repeats 5V
No
and 0V cyclically during DP
Replace IC2.
No
No
Replace IC10.
call origination
Yes
Check CN10.
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