Canon imageRUNNER ADVANCE 9070 PRO series Service Manual Digest page 88

E Detailed Occurance Items
code code area
E077 -0001 -05 Title
Description
of detection
Measures
3
3-62
Description
Secondary transfer external roller detachment/attachment
error
The secondary transfer roller attachment/detachment HP
sensor (PS22) cannot detect the home position within a
specified period.
1. Check the connection between the secondary transfer
roller attachment/detachment HP sensor (PS22) and
the fixing feed driver (UN5). (Connector, Breaking
(shorting))
Sensor side: J7214, J8102 PCB side: 1509
2. Check the connection between the fixing feed driver
and the DC controller interface PCB (UN2). (Connector,
Shorting)
Fixing feed driver: J1550 DC controller interface PCB:
J1214
3. Check the connection between the secondary transfer
roller detachment motor (M31) and the pickup feed
driver PCB (UN4). (Connector, Breaking (shorting))
Motor side: J7003 DC controller interface side: 1409
4. Check the connection between the pickup feed driver
PCB and the DC controller interface PCB. (Connector,
Breaking (shorting))
Pickup feed driver PCB: J1401 DC controller interface
PCB: J1215
5. Check the installation condition of the detachment
mechanism assemblies (cam, arm, secondary transfer
external roller holder).
Check the condition of the attachment/detachment
cam mechanism assembly.
6. Replace the secondary transfer roller attachment/
detachment HP sensor.
7. Check the drive gear. -> Replace the gear.
8. Replace the secondary transfer roller detachment
motor.
9. Replace the drive unit.
T-3-6