Troubleshooting Without Error Messages; Initial Operation Problems - Xerox 7142 Service Manual

RJ-901C/RJ-900C Maintenance Manual

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
1 Machine power
cannot be turned ON
2 Abnormal LCD
operation (no
displays/garbled
characters)
Check item
1. Is operation panel
unit assembly cable
broken or shorted?
2. Panel unit assembly
may be damaged.
3. Inlet assembly may
be defective.
4. Power board
assembly may be
defective.
1. Check power supply
voltage (AC100V).
2. Check power supply
voltage (DC5V).
3. Check power supply
voltage (DC24V,
DC42V).
9-33
Action
Replace panel cable.
Replace panel unit
assembly.
Replace inlet assembly.
Replace power board
assembly.
Replace power board
assembly.
Replace power board
assembly.
Replace power board
assembly.
9 Troubleshooting
Reference
"4.2.2
Removing
Operation
Panel Unit"
p.4-8
"4.2.2
Removing
Operation
Panel Unit"
p.4-8
"4.3.5
Replacing
Inlet
Assembly"
p.4-24
"4.3.4
Replacing
Power Board
Assembly"
p.4-22
"4.3.4
Replacing
Power Board
Assembly"
p.4-22
"4.3.4
Replacing
Power Board
Assembly"
p.4-22
"4.3.4
Replacing
Power Board
Assembly"
p.4-22