MUTOH ValueJet 1604 Service Manual page 410

9 Troubleshooting
Table 9-9 Symptoms, Check Items and Actions for Printing Problems (Continued)
No. Symptom
6 Machine outputs all
black printing.
7 Blocky printing
quality.
8 Blocky image printing.
9 CR line seems dotted.
10 White or black lines
appear in printing.
Rev.-05
Check item
1. Check connection of
head cable connectors
on CR board assembly
side and print head
side.
• Is head cable inserted
obliquely?
• Is it locked securely?
2. Is CR cable inserted
obliquely?
3. CR cable assembly
may be damaged.
4. Is print head damaged? Replace damaged print head
5. CR board assembly
may be
malfunctioning.
6. Main board assembly
may be damaged.
1. Is working
environment
appropriate?
9-48
VJ-1604 Maintenance Manual
Action
Reconnect head cable.
Reconnect MAIN board
assembly connectors J9 - J11
and CR board assembly
connectors J201 - J205.
Replace CR cable assembly.
assembly.
Replace CR board assembly.
Replace MAIN board
assembly.
Use machine under specified
environment.
Reference
"4.8.9
Replacing
Print Head"
p.4-115
"4.8.3
Replacing CR
Board
Assembly"
p.4-107
"4.4.7
Replacing
MAIN Board"
p.4-49
"4.8.3
Replacing CR
Board
Assembly"
p.4-107
"4.7.8
Replacing
CR_FFC" p.4-
100
"4.8.9
Replacing
Print Head"
p.4-115
"4.8.3
Replacing CR
Board
Assembly"
p.4-107
"4.4.7
Replacing
MAIN Board"
p.4-49
"3.5
Choosing a
Place for the
Printer" p.3-6