Xerox 7142, Service Manual

Page: 288 / 341

9 Troubleshooting RJ-901C/RJ-900C Maintenance Manual
9-44
7 Tracing paper and
thin paper cannot be
detected. 2. Is P_REAR sensor
assembly and
P_EDGE assembly
sensor judged as
normal when
checked through
"Test: Sensor" of
plotter self-
diagnosis?
• Check connection of
following main board
assembly connectors.
• Main board
assembly: J130,
J131
• CR board assembly:
J211
• Replace P_REAR
sensor assembly and
P_EDGE sensor
assembly.
"4.3.3
Replacing
Main Board
Assembly"
p.4-21
"4.10.1
Replacing
CR Board
Assembly"
p.4-64
"4.9.2
Replacing
P_REAR
Sensor
Assembly"
p.4-63
"4.6.2
Replacing
Cutter
Holder
Assembly"
p.4-41
3. Check sensor
reflection amount
from "Sen:
PaperEdge AD" of
self-diagnosis
function.
Adjust with main board
assembly trimmer (R117,
R119).
Replace P_EDGE sensor
assembly. "7.11.1
P_EDGE
Sensor
Sensitivity
Adjustment"
p.7-34
"4.6.2
Replacing
Cutter
Holder
Assembly"
p.4-41
4. Check panel cable
connectors at
operation panel unit
assembly side and
main board assembly
side.
• Is panel cable
inserted obliquely?
• Is it locked securely?
Reconnect following
connectors.
• Main board
assembly: J125
• Operation panel unit
assembly
"4.3.3
Replacing
Main Board
Assembly"
p.4-21
5. Panel cable may be
damaged.
Replace panel cable. "4.2.2
Removing
Operation
Panel Unit"
p.4-8
Table 9-10 Symptoms, Check Items and Actions for Media Feed Problems(Continued)
No. Symptom Check item Action Reference