Mita PointSource Ai 3010, Service Manual

Page: 424 / 478

2AR
3-6-51
Problem Causes Check procedures/corrective measures
See page 3-6-3.
Check the developing bias wire. If there is
any problem, replace it.
Reinsert the connector. Also check for
continuity within the connector cable. If
none, repair or replace the cable.
Check if the developing bias is output when
CN1-4 on the high-voltage transformer PCB
is low while maintenance item U030 is run. If
not, replace the high-voltage transformer
PCB.
Check if CN9-11 on the engine PCB goes
low during copying. If not, replace the engine
PCB.
If the level of CN5-2 on the scanner motor
PCB does not change when the original
detection switch is turned on and off, replace
the original detection switch.
Broken transfer
wire.
Poor contact of the
high-voltage trans-
former PCB con-
nector terminals.
Defective main
PCB.
Defective engine
PCB.
Defective high-
voltage transformer
PCB.
Poor contact of the
developing bias
wire.
Poor contact of the
high-voltage trans-
former PCB con-
nector terminals.
Defective high-
voltage transformer
PCB.
Defective engine
PCB.
Defective original
detection switch.
(22)
Transfer
charging is
not performed.
(23)
No developing
bias is output.
(24)
The original
size is not
detected.