Oki ML420 Maintenance Manual page 110

Line feed trouble
8
Turn the power off, and rotate the platen manually.
Does the platen rotate smoothly?
Yes No
Is the platen gear (L) broken?
No
Is the LF motor idle gear broken?
No
Is the platen gear (R), idle gear or change gear broken?
No
Set change lever to the rear position.
Does the platen rotate smoothly?
No
Replace LF motor assembly.
Replace LF motor assembly.
Remedied?
No Yes
End
Replace Control Board.
42113901TH01 Rev.3
Yes
Replace Platen assembly.
Yes
Replace the LF motor assembly or LF idle gear.
Yes
Replace the gear.
Yes
Replace Tractor feed assembly.
Oki Data CONFIDENTIAL
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