Xerox 7142 Service Manual page 280

9 Troubleshooting
Table 9-9 Symptoms, Check Items and Actions for Initial Operation Problems (Continued)
No. Symptom
3
4 Though initial charge
has started, ink does
not reach head.
5 Though ink reaches
head, ink is not
discharged from head.
6 Ink is not discharged
though ink charge is
finished.
Check item
7. Main board assembly
may be damaged.
Is spring of ink system
assembly detached or
damaged?
Is capping position
appropriate?
1. Are damper
assembly, ink tube
and SUS pipe joint
screws (K1, K2, Y,
M, C) securely
tightened?
Is O-ring properly
installed?
2. Does shield part of
damper assembly
have air leak?
3. Is ink tube in ink
system assembly
bent?
9-36
RJ-901C/RJ-900C Maintenance Manual
Action
• Replace main board
assembly.
• After replacement,
execute initial ink
charge from "Adj:
Input Rank" of self-
diagnosis function.
• If the part is detached,
remount it.
• If the part is damaged,
replace ink system
assembly.
• If ink inflow is
confirmed, execute
initial ink charge.
• Remove head cover
and check damper
assembly.
• Remove side cover (L, R)
and cartridge cover, and
check ink tube and SUS
pipe joint screws.
• Replace damper
assembly and check if
cleaning operation
causes ink inflow.
• If ink inflow is
confirmed, execute
initial ink charge.
• Replace ink system
assembly and check if
cleaning operation
causes ink inflow.
• If ink inflow is
confirmed, execute
initial ink charge.
Reference
"4.3.3
Replacing
Main Board
Assembly"
p.4-21
"4.7.2
Replacing
Pump Cap
Assembly"
p.4-52
Operation
Manual
"4.2.1
Removing R
Side Cover"
p.4-6
"4.2.3
Removing L
Side Cover"
p.4-9
"4.2.4
Removing
Ink Holder (I/
H) Cover"
p.4-11
"4.6.1
Replacing
Print Head"
p.4-37
"4.7.2
Replacing
Pump Cap
Assembly"
p.4-52