Clock Ng - Oki OKIFAX4550 Maintenance Manual

4.2.9 Clock NG

9: Clock NG
Clock display is NG
No
Time error
Battery voltage at 2.5V
or higher
Yes
Input waveform of pin 5
of IC23 is similar to
Figures H.7(1/2, 2/2)
Yes
Input waveform of
pin 5 of IC22 is similar to
Figures H.7(1/2, 2/2)
Yes
Input waveform of
pin 11 of IC22 is similar to
Figures H.7(1/2, 2/2)
Yes
Input waveforms of pin
10 of IC22 is similar to
Figures H.7(1/2, 2/2)
Yes
Replace IC22.
41309401TH Rev.4
Yes
All other operation display
are OK
No
See the operation
interface error.
No
Replace the battery.
No
5 : RTCCS
No
5 : RTCWR
No
11 : RTCDATA
No
10 : CLK
Replace IC2.
Yes
Memory check is OK
No
(memory error does not
displayed on
operation panel)
Yes
See the memory error.
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