Epson AcuLaser C4000 Service Manual page 184

EPSON AcuLaser C4000/C4100/C3000
Step
Harness Assy Front 1 (PL15.2.7) continuity check
1. Disconnect the P/J13 connector from the PWBA MCU & HVPS. (Refer to Ch4-4.2.18.1)
2. Check the continuity for the following lines.
P1361-1 <=> J13-16
6 P1361-2 <=> J13-15
P1361-3 <=> J13-14
P1361-4 <=> J13-13
P1361-5 <=> J13-12
Is the continuity between P1361 <=> J13 normal?
5V DC power supply
1. Disconnect the P/J41 connector from the PWB Drive (PL15.1.15).
7
2. Measure the voltage between P41-24 <=> P41-21/22.
Is there 5V DC between P41-24 <=> P41-21/22?
Harness Assy DRV 1 (PL15.2.2) continuity
1. Disconnect the P/J11 connector from the PWBA MCU & HVPS. (Refer to Ch4-4.2.18.1)
8
2. Check the continuity between J41-24 <=> J11-17.
Is the continuity normal between J41-24 <=> J11-17 normal?
Sensor Assy ADC (PL6.1.11)
1. Replace the Sensor Assy ADC. (Refer to Ch4-4.2.9.2)
9
2. Turn On the power.
Does an error occur even when a new Sensor Assy ADC is installed?
PWB Drive (PL15.1.15) continuity
1. Disconnect the P/J61 connector from the PWB Drive.
10
2. Measure the voltage between J61-8 <=> J61-7.
Is there 5V DC between J61-8 <=> J61-7.
Harness Assy LVNC (PL15.2.1) continuity
1. Disconnect the P/J165 connector from the LVPS (PL15.1.10).
11
2. Measure the voltage between P165-1 <=> P165-2.
Is there 5V DC between P165-1 <=> P165-2.
Troubleshooting
Check
Level 2 FIP
Treatment
Yes
Replace the Harness Assy Front 1
Go to step 7.
(PL15.2.7).
Go to step 8. Go to step 10.
Replace the Harness Assy DRV 1
Go to step 9.
(PL15.2.2).
Replace the PWBA MCU &
End of procedure
HVPS. (Refer to Ch4-4.2.18.1)
Replace the PWB Drive.
Go to step 11.
(Refer to Ch4-4.2.18.5)
Replace the Harness Assy
Go to FIP-DC (Page 5-280).
LVNC (PL15.2.1).
Revision F
No
3-168