Xerox 7142 Service Manual - page 296

9 Troubleshooting

RJ-901C/RJ-900C 　 Maintenance Manual

9-52

7

Machine outputs all 

black printing.

1. Check connection of 

head cable connectors 

on CR board assembly 

side and print head 

side. 

•

Is head cable inserted 

obliquely?

•

Is it locked securely?

Reconnect head cable.

"4.6.1 

Replacing 

Print Head" 

p.4-37

"4.10.1 

Replacing CR 

Board 

Assembly" 

p.4-64

2. Is CR cable inserted 

obliquely?

Reconnect main board 

assembly connectors J110 - 

J114 and CR board assembly 

connectors J201 - J205.

"4.3.3 

Replacing 

Main Board 

Assembly" 

p.4-21

"4.10.1 

Replacing CR 

Board 

Assembly" 

p.4-64

3. CR cable assembly 

may be damaged.

Replace CR cable assembly.

"4.10.3 

Replacing CR 

Tape Wire" 

p.4-68

4. Is print head damaged? Replace damaged print head 

assembly. 

"4.6.1 

Replacing 

Print Head" 

p.4-37

5. CR board assembly 

may be 

malfunctioning.

Replace CR board assembly.

"4.10.1 

Replacing CR 

Board 

Assembly" 

p.4-64

6. Main board assembly 

may be damaged.

Replace main board 

assembly.

"4.3.3 

Replacing 

Main Board 

Assembly" 

p.4-21

8

9

10

11

Blocky printing 

quality.

Blocky image printing.

CR line seems dotted.

White or black lines 

appear. (No missing or 

ink crooking in step 

patters in location 1G - 

7G in "Test Print")

1. Is working 

environment 

appropriate?

Use machine under specified 

environment.

"3.5 

Choosing a 

Place for the 

Plotter" p.3-10

Table 9-11  Symptoms, Check Items and Actions for Printing Problems(Continued)

No.

Symptom

Check item

Action

Reference