Epson AcuLaser C4000 Service Manual page 143

EPSON AcuLaser C4000/C4100/C3000
Step
Harness Assy EEPROM (PL15.2.10) continuity check
1. Disconnect the P/J140 connector from the PWBA MCU & HVPS. (Refer to Ch4-4.2.18.1)
2. Check the continuity for the following lines.
10
P71-2 <=> J140-5
P71-3 <=> J140-4
Is the continuity between P71 <=> J140 normal?
Harness Assy CRUM (PL12.3.8) continuity check
1. Disconnect the P/J710 connector from the Conn Assy CRUM MC (PL12.3.10).
(Refer to Ch4-4.2.15.1)
2. Disconnect the P/J71 relay connector between the harness Assy CRUM and the harness
Assy EEPROM (PL15.2.10).
11
3. Check the continuity for the following lines.
J71-2 <=> J710-5
J71-3 <=> J710-4
Is the continuity between J71 <=> J710 normal?
Harness Assy EEPROM (PL15.2.10) continuity check
1. Disconnect the P/J140 connector from the PWBA MCU & HVPS (PL15.1.2).
(Refer to Ch4-4.2.18.1)
2. Check the continuity for the following lines.
P71-2 <=> J140-5
12
P71-3 <=> J140-4
P71-4 <=> J140-3
P71-5 <=> J140-2
Is the continuity between P71 <=> J140 normal?
Troubleshooting
Check
Level 2 FIP
Treatment
Yes
Replace the PWBA MCU & Replace the Harness Assy
HVPS. (Refer to Ch4-4.2.18.1) EEPROM (PL15.2.10).
Replace the harness Assy
Go to step 12.
CRUM (PL12.3.8).
Replace the PWBA MCU & Replace the Harness Assy
HVPS. (Refer to Ch4-4.2.18.1) EEPROM (PL15.2.10).
Revision F
No
3-127