Reading Running System Ng - Oki OKIFAX4550 Maintenance Manual

4.2.2 Reading running system NG

2: Reading running
system NG
(document feed error)
Motor does not start
when the document is fed
to PC1
No
Motor does not stop when
the document is fed to
PC2
No
Pin 95 of CPU1 becomes
"L" when the document is
Pins 3, 7, 8, 12 of IC7 repeat
30V ON/OFF cyclically
Yes
Check CN1.
41309401TH Rev.4
Yes
Pin 94 of CPU1 becomes
"L" when the document is
inserted to PC1
Yes
Yes
fed to PC2
No
Check CN3.
No
F2 continuity is provided
No
Waveforms of pins 186
through 189 of IC2 are
Replace F2 and IC7.
No
Yes
Pin 12 of IC14 becomes "L"
when the document is
inserted to PC1
Replace IC14.
Yes
Yes
similar to Figure H.2
No
Replace IC2.
No
Yes
Check CN3.
Replace IC7,
or TR501-504.
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