Xerox 7142 Service Manual - page 307

RJ-901C/RJ-900C 　 Maintenance Manual

9 Troubleshooting

9-63

21

Poor linearity in media 

feed direction (media 

splicing accuracy)

1. Is registered head 

voltage different from 

actual head voltage?

Enter correct head voltage.

"5.5.2 

Head Rank 

Input Menu" 

p.5-25

2. Adjust head slant.

Adjust head slant.

"7.6 CR 

Belt Tension 

Adjustment" 

p.7-25

3. Is CR belt tension 

adjusted to 

specification?

Adjust CR belt tension.

"7.6 CR 

Belt Tension 

Adjustment" 

p.7-25

4. Are Bi-Directional 

printing positions 

aligned correctly?

Align two-way printing 

positions.

"5.5.6 CW 

Adjustment" 

p.5-31

5. Is T fence 

contaminated?

Clean T fence.

If T fence is still 

contaminated or damaged, 

replace T fence.

"4.5.4 

Replacing T 

Fence" p.4-33

6. Check if vertical lines 

plotted from "Adj: 

Black Slant" are not 

connected even though 

nozzle check pattern 

from "Adj: Chk 

Nozzle" of self-

diagnosis function is 

adjusted properly.

Replace steel bearer 

assembly.

"4.10.3 

Replacing CR 

Tape Wire" 

p.4-68

7. Is carriage assembly 

loose?

Replace carriage assembly.

-

22

Poor right angle 

accuracy

1. Is suction fan judged 

as normal when 

checked through "Test: 

Fan" of self-diagnosis 

function?

•

Check connection of 

following maintenance 

board assembly 

connectors. 

• Suction fan 1 cable: 

J128

• Suction fan 2 cable: 

J127

• Suction fan L cable: 

J126

•

Replace suction fan 

assembly. 

•

Replace cable of suction 

fan that does not operate 

normally.

"4.9.1 

Replacing 

Suction Fan 

Assembly" 

p.4-62

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

No.

Symptom

Check item

Action

Reference