Xerox 7142 Service Manual - page 285

RJ-901C/RJ-900C 　 Maintenance Manual

9 Troubleshooting

9-41

13

Operation panel 

accepts no inputs.

1. Is operation panel 

cover broken or 

contaminated?

Replace operation panel 

cover.

-

2. 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

3. Operation panel unit 

assembly may be 

damaged.

Replace panel unit 

assembly.

"4.2.2 

Removing 

Operation 

Panel Unit" 

p.4-8

4. Main board assembly 

may be 

malfunctioning.

Replace main board 

assembly.

"4.3.3 

Replacing 

Main Board 

Assembly" 

p.4-21

14

Machine prints 

nothing though it 

receives data.

1. Refer to "9.3.6 

Online Function 

Problem".

-

"9.3.6 

Online 

Function 

Problems" 

p.9-72

Table 9-9  Symptoms, Check Items and Actions for Initial Operation Problems (Continued)

No.

Symptom

Check item

Action

Reference