Oki OKIOFFICE84 Maintenance Manual page 458

2: Reading running
system NG
(document feed error)
Motor does not stop
when the document is fed
to PC1
No
Motor does not stop when
the document is fed to
PC2
No
Pin 82 of IC2 becomes "L"
when the document is
Pins 3, 7, 8, 12 of IC7 repeat
30V ON/OFF cyclically
Yes
Check CN1.
Yes
Pin 81 of IC2 becomes "L"
when the document is
inserted to PC1
Yes
Yes
fed to PC2
No
Check CN3.
No
F2 continuity is provided
No
Replace F2 and IC7.
No
Yes
Pin 12 of IC14 becomes "L"
when the document is
inserted to PC1
Replace IC14.
Yes
Waveforms of pins 77
through 80 of IC16 are
similar to Figure 2-1
No
Replace IC16.
H - 3
No
Yes
Check CN3.
Yes
Replace IC7, IC17,
or TR509-521.
40672201TH Rev. 4