Xerox 7142 Service Manual - page 283
RJ-901C/RJ-900C Maintenance Manual
9 Troubleshooting
9-39
7
Machine makes no
operations after
turned ON.
1. Is "Sen: Cover open"
displayed on LCD
with plotter cover
closed?
Or, is cover sensor
assembly function
detected as normal
when checked
through "Test:
Sensor" of self-
diagnosis function?
•
Adjust cover sensor
assembly height.
•
Check main board
assembly connector
J105.
•
Replace cover sensor
assembly.
"7.7
Head
Alignment
Adjustment(
Horizontal
Height)" p.7-
26
"4.3.3
Replacing
Main Board
Assembly"
p.4-21
"4.8.3
Replacing
Cover Sensor
Assembly"
p.4-60
8
After turned ON,
machine displays
"Initializing" and
resets itself.
2. Check panel cable
connectors at
operation panel unit
assembly and main
board assembly.
•
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
9
Machine does not
perform initialization
even if media is set.
3. Is "Set Paper"
displayed on LCD
with pressure arm
lowered?
•
Check main board
assembly connector
J132.
•
Replace lever sensor
assembly.
"4.3.3
Replacing
Main Board
Assembly"
p.4-21
"4.5.3
Replacing
Lever
Sensor" p.4-
32
10
Machine does not
start operation even if
front cover is closed.
4. Is P_REAR sensor
assembly judged as
normal when
checked through
"Test: Sensor" of
self-diagnosis
function?
•
Check main board
assembly connector
J130, J131.
•
Replace P_REAR
sensor Assembly.
"4.3.3
Replacing
Main Board
Assembly"
p.4-21
"4.9.2
Replacing
P_REAR
Sensor
Assembly"
p.4-63
Table 9-9 Symptoms, Check Items and Actions for Initial Operation Problems (Continued)
No.
Symptom
Check item
Action
Reference