Xerox 7142, Service Manual

Page: 318 / 341

9 Troubleshooting RJ-901C/RJ-900C Maintenance Manual
9-74
4 Some data are not
printed (missing). 1. Plotter driver may be
defective.
Update plotter driver. Operation
Manual
Some data change to
garbage. 2. Program ROM may be
defective.
Update firmware. "7.3.5
Firmware
Installation"
p.7-15
3. Is T fence
contaminated or worn
out?
• If grease or dust collect:
Wipe fence with a dry
cloth.
• If ink deposit presents:
Wipe it off with cloth
dampened with neutral
detergent.
• If contamination or
deposit is too heavy:
Replace T fence.
"4.5.4
Replacing T
Fence" p.4-33
4. Check "CR Encoder"
from "Test: Encoder"
of self-diagnosis
function.
• Move carriage in both
directions and check the
numeral value on LCD.
If the numeral value
doesn't change
normaly,check main
board assembly
connector J129.
• Replace T fence.
• ReplaceTF_ENC
assembly.
• Replace CR motor
assembly.
• Replace CR board
assembly.
• Replace CR cable.
"4.3.3
Replacing
Main Board
Assembly"
p.4-21
"4.5.4
Replacing T
Fence" p.4-33
"4.5.1 CR
Motor
Assembly"
p.4-30
"4.10.1
Replacing CR
Board
Assembly"
p.4-64
"4.10.3
Replacing CR
Tape Wire"
p.4-68
5. Main board assembly
may be
malfunctioning.
Replace main board
assembly. "4.3.3
Replacing
Main Board
Assembly"
p.4-21
Table 9-14 Symptoms, Check Items, and Actions for Online Function Problems(Continued)
No. Event/symptom Check item Action Reference