MUTOH ValueJet Service Manual page 368

Table 9-9 Symptoms, Check Items and Actions for Printing Problems (Continued)
No. Symptom
12 Many satellites
(unnecessary dots)
Shaggy plotout
Uneven lines (plotted
with stains)
AP-74109 Rev 1.1
Check item
11. Does pump motor
rotate during cleaning
operation?
12. When cleaning
operation is
performed, are gears
and transmission gear
shaft damaged?
13. Is spring of ink system
assembly detached or
damaged?
14. Is ink tube in ink
system assembly bent?
15. Does residual ink
collect on print head
assembly or in
nozzles?
16. Is print head assembly
damaged?
9-54
ValueJet 1304 Service manual
Action
• Reconnect main board
assembly connector J22
and J23.
• Replace pump motor
assembly.
• Replace main board
assembly.
Replace maintenance base
assembly.
• If the part is detached,
remount it.
• If the part is damaged,
replace ink system
assembly.
• Replace ink system
assembly and check if
cleaning operation
causes ink inflow.
• If ink inflow is
confirmed, execute
initial ink charge.
Clean head as follows.
1) Clean head from
"Check4: Adjustment" -
"Adj 9: HeadWash" of
printer self-diagnosis.
2) Perform initial ink
charge from "Check8:
Parameter" -
"Parameter2: Update" -
"Update1: Head Rank"
of printer self-diagnosis.
3) Check printouts again.
Replace damaged print head
assembly.
Reference
"4.3.3
Replacing
Main Board
Assembly"
p.4-29
"4.7.1
Removing
Maintenance
Base
Assembly"
p.4-71
"4.7.1
Removing
Maintenance
Base
Assembly"
p.4-71
"4.7.2
Replacing
Maintenance
Assembly"
p.4-76
"4.7.2
Replacing
Maintenance
Assembly"
p.4-76
"5.7.9
HeadWash
Menu" p.5-44
"5.7.5
Voltage
Adjustment"
p.5-33
"4.6.1
Replacing
Print Head"
p.4-61