MUTOH ValueJet 1604 Service Manual page 406

9 Troubleshooting
Table 9-9 Symptoms, Check Items and Actions for Printing Problems (Continued)
No. Symptom
4 Nozzle plugging or ink
splash is not eliminated
even after cleaning.
(Continued)
Rev.-05
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 CR_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.
9-44
VJ-1604 Maintenance Manual
Action
Check wiper installation
condition and secure it
correctly.
Enter correct head rank.
Clean head as follows.
1. Clean head from "Adj
9: HeadWash" of printer
self-diagnosis.
2. Perform initial ink
charge from "Update 1:
Head Rank".
3. Check printouts again.
• If they contact with each
other, adjust CR_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
"4.9.2
Replacing
Cleaner Head"
p.4-122
"(1) Head
Rank" p.5-56
"5.7.8
HeadWash
Menu" p.5-43
"(1) Head
Rank" p.5-56
"4.8.3
Replacing CR
Board
Assembly"
p.4-107
"4.7.4
Replacing T
Fence" p.4-92
"4.9.3
Replacing
Maintenance
Assembly"
p.4-123
"4.8.9
Replacing
Print Head"
p.4-115
"4.4.7
Replacing
MAIN Board"
p.4-49