MUTOH ValueJet Service Manual page 370

Table 9-9 Symptoms, Check Items and Actions for Printing Problems (Continued)
No. Symptom
15 Poor accuracy of
segment length in head
travel direction (main
scan direction).
16 Poor linearity in head
scan direction
(straightness)
AP-74109 Rev 1.1
Check item
1. Is working
environment
appropriate?
2. Is CR belt tension
adjusted to
specification?
3. Is T fence
contaminated?
4. Internal process of
main board assembly
may be abnormal.
1. Is suction fan run as
normal when checked
through "Check2:
Test" - "Test5: Fan" of
self-diagnosis
function?
2. Is PF driving pulley
loose?
3. Is PF speed reduction
belt tension adjusted to
specification?
9-56
ValueJet 1304 Service manual
Action
Use machine under specified
environment.
Adjust CR belt tension.
• Clean T fence.
• If T fence is still
contaminated or
damaged, replace T
fence.
Initialize parameters and
reenter or modify them.
Then, check machine
operation again.
• Check connection of
following main board
assembly connectors.
• Suction 1 - 4 cable:
J25 - J29
• Replace suction fan
assembly.
• Replace cable of suction
fan that does not operate
normally.
Replace PF motor assembly.
Adjust PF speed reduction
belt tension.
Reference
"3.4
Choosing a
Place for the
Printer" p.3-5
"7.6 CR
Belt Tension
Adjustment"
p.7-35
"4.5.4
Replacing T
Fence" p.4-55
"5.11.1
Parameter
Initialization
Menu" p.5-53
"4.9.1
Replacing
Suction Fan
Assembly"
p.4-89
"4.4.1
Replacing PF
Motor
Assembly"
p.4-44
"(3)
Confirming
Completion of
Installation to
Printer" p.7-
26