Xerox 7142 Service Manual - page 277
RJ-901C/RJ-900C Maintenance Manual
9 Troubleshooting
9-33
9.3 Troubleshooting Without Error Messages
This section describes the symptoms of errors without an error message as well as the check items and
recovery actions.
9.3.1
Initial Operation Problems
Table 9-9 Symptoms, Check Items and Actions for Initial Operation Problems
No.
Symptom
Check item
Action
Reference
1
Machine power
cannot be turned ON
1. Is operation panel
unit assembly cable
broken or shorted?
Replace panel cable.
"4.2.2
Removing
Operation
Panel Unit"
p.4-8
2. Panel unit assembly
may be damaged.
Replace panel unit
assembly.
"4.2.2
Removing
Operation
Panel Unit"
p.4-8
3. Inlet assembly may
be defective.
Replace inlet assembly.
"4.3.5
Replacing
Inlet
Assembly"
p.4-24
4. Power board
assembly may be
defective.
Replace power board
assembly.
"4.3.4
Replacing
Power Board
Assembly"
p.4-22
2
Abnormal LCD
operation (no
displays/garbled
characters)
1. Check power supply
voltage (AC100V).
Replace power board
assembly.
"4.3.4
Replacing
Power Board
Assembly"
p.4-22
2. Check power supply
voltage (DC5V).
Replace power board
assembly.
"4.3.4
Replacing
Power Board
Assembly"
p.4-22
3. Check power supply
voltage (DC24V,
DC42V).
Replace power board
assembly.
"4.3.4
Replacing
Power Board
Assembly"
p.4-22