Xerox 7142 Service Manual page 292

9 Troubleshooting
Table 9-11 Symptoms, Check Items and Actions for Printing Problems(Continued)
No. Symptom
4 Nozzle plugging or ink
splash is not eliminated
even after cleaning.
(Continued)
Check item
3. Is nozzle face wiped/
rubbed correctly?
4. Is registered head rank
different from actual
head rank?
5. Does residual ink
collect on print head
assembly or in
nozzles?
6. Check if TF_ENC
assembly and
T fence contact with
each other.
7. Is ink tube in ink
system assembly bent?
8. Is print head damaged? Replace damaged print head.
9. Main board assembly
may be damaged.
9-48
RJ-901C/RJ-900C Maintenance Manual
Action
Check wiper installation
condition and secure it
correctly.
Enter correct head rank.
Clean head as follows.
1. Clean head from "Adj:
Clean Head" of plotter
self-diagnosis.
2. Perform initial ink
charge from "Adj: Input
Rank".
3. Check printouts again.
• 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.
• Replace ink system
assembly and check if
cleaning operation
causes ink inflow.
• If ink inflow is
confirmed, execute
initial ink charge.
Replace main board
assembly.
Reference
"4.7.3
Replacing
Cleaner Head
(Cleaning
Wiper)" p.4-53
"5.5.2
Head Rank
Input Menu"
p.5-25
"5.5.13
Head Cleaning
Menu" p.5-45
"5.5.2
Head Rank
Input Menu"
p.5-25
"4.10.1
Replacing CR
Board
Assembly"
p.4-64
"4.5.4
Replacing T
Fence" p.4-33
"4.7.2
Replacing
Pump Cap
Assembly"
p.4-52
"4.6.1
Replacing
Print Head"
p.4-37
"4.3.3
Replacing
Main Board
Assembly"
p.4-21