Epson AcuLaser C4000 Service Manual page 202

EPSON AcuLaser C4000/C4100/C3000
Step
Power supply to Sensor TNR Full (PL6.1.13)
Measure the following voltage at the relay connector between the Harness Assy TFLSNS
7 and the Harness Assy EEPROM (PL15.2.10).
P/J141-3 <=> P/J141-1
Is there +5V DC between P/J141-3 <=> P/J141-1?
Harness Assy TFLSNS (PL6.1.14) continuity check
1. Disconnect the P/J142 connector from the Sensor TNR Full.
2. Disconnect the P/J141 relay connector between the Harness Assy TFLSNS and the
Harness Assy EEPROM (PL15.2.10).
8 3. Check the continuity for the following lines.
J142-1 <=> J141-3
J142-2 <=> J141-2
J142-3 <=> J141-1
Is the continuity between J142 <=> J141 normal?
PWBA MCU & HVPS (PL15.1.2)
1. Replace the PWBA MCU & HVPS with a new part. (Refer to Ch4-4.2.18.1)
9
2. Turn On the power.
Does the problem still occur?
Troubleshooting
Check
Level 2 FIP
Treatment
Yes
Replace the Harness Assy
Go to step 8.
EEPROM (PL15.2.10).
Replace the Sensor TNR Full. Replace the Harness Assy
(Refer to Ch4-4.2.9.3) TFLSNS (PL6.1.14).
Go to FIP-Noise (Page 5-281). Problem solved.
Revision F
No
3-186