Xerox 7142 Service Manual page 304

9 Troubleshooting
Table 9-11 Symptoms, Check Items and Actions for Printing Problems(Continued)
No. Symptom
13
14
15
16 Mixed color lines are
not overlaid.
17 Black and other colors
do not align.
Check item
17. Main board assembly
may be damaged.
1. Is CR belt tension
adjusted to
specification?
2. Is registered head
voltage different from
actual head voltage?
3. Is head slant
inappropriate?
4. Are Bi-Directional
printing positions
aligned correctly?
5. Is CW adjustment
inappropriate?
1. Check if TF_ENC
assembly and T fence
contact with each
other.
9-60
RJ-901C/RJ-900C Maintenance Manual
Action
Replace main board
assembly.
Adjust CR belt tension.
Enter correct head voltage.
Adjust head slant.
Align Bi-Directional printing
positions.
Perform CW adjustment.
• If they contact with each
other, adjust TF_ENC
assembly and T fence
positions.
• If problem remains even
after position
adjustment, replace CR
board assembly and T
fence.
Reference
"4.3.3
Replacing
Main Board
Assembly"
p.4-21
"7.6 CR
Belt Tension
Adjustment"
p.7-25
"5.5.2
Head Rank
Input Menu"
p.5-25
"7.6 CR
Belt Tension
Adjustment"
p.7-25
"5.5.6 CW
Adjustment"
p.5-31
"5.5.6 CW
Adjustment"
p.5-31
"4.10.1
Replacing CR
Board
Assembly"
p.4-64
"4.5.4
Replacing T
Fence" p.4-33