Epson AcuLaser C4000 Service Manual page 159

EPSON AcuLaser C4000/C4100/C3000
Step
I/L Switch check
1. Remove the Cover Side R. (Refer to Ch4-4.2.4.9)
39 2. Open and close the Cover Assy Front Head (PL1.1.2).
3. Check the operation of the I/L Switch of the PWB Drive (PL15.1.15).
Is the I/L Switch being pressed correctly?
I/L switch function check
1. Disconnect the P/J60 and P/J41 connectors of the PWB Drive (PL15.1.15).
2. While pressing and releasing the I/L Switch, check the continuity for the following.
40 P60-1 <=> P47-13
P60-2 <=> P41-35
For each circuit, is there continuity when the I/L Switch is pressed and no continuity
when it is released?
PWB drive (PL15.1.15) 24V DC power supply check
1. Disconnect the P/J60 connector from the PWB Drive (PL15.1.15).
41
2. Measure the voltage between P60-1 <=> P60-2.
Is there +24V DC between P60-1 <=> P60-2?
Harness Assy 24V (PL15.2.6) continuity
1. Disconnect the P/J60 connectors of the PWB Drive (PL15.1.15) and P/J63 connector of
the LVPS (PL15.1.10).
2. Check the continuity for the following lines.
42
J60-1 <=> J63-1
J60-2 <=> J63-2
Is there continuity in all lines between J60 <=> J63?
PWB Drive (PL15.1.15) power supply circuit continuity
43 With the Interlock Switch pressed, check the continuity between P47-13 <=> P60-1.
Is there continuity between P47-13 <=> P60-1?
Solenoid Feed Tray 1(PL.4.3.17) resistance check
44 Disconnect the P/J474 connector from the Solenoid Feed Tray 1 (Refer to Ch4-4.2.7.17).
Is the resistance 100 Ω between J474-1 <=> J474-2?
Harness Assy DRV 2 (PL15.2.3) continuity check
1. Disconnect the P/J42 connector from the PWB Drive (PL15.1.15).
45 2. Disconnect the P/J12 connector from the PWBA MCU & HVPS (Refer to Ch4-4.2.18.1).
3. Check the continuity between J12-10 <=> J42-21.
Is the continuity between J12-10 <=> J42-21 normal?
Troubleshooting
Check
Level 2 FIP
Treatment
Yes
Go to step 40. Reinstall applicable parts.
Replace the PWB Drive.
Go to step 41.
(Refer to Ch4-4.2.18.5)
Replace the PWB Drive.
Go to step 42.
(Refer to Ch4-4.2.18.5)
Replace the Harness Assy 24V
Go to step 43.
(PL15.2.6).
Replace the PWB Drive. (Refer
Go to FIP-DC (Page 5-280).
to Ch4-4.2.18.5)
Replace the Solenoid FeedTray 1
Go to step 45.
(PL.4.3.17).
Replace the PWBA MCU & Replace the Harness Assy DRV 2
HVPS. (Refer to Ch4-4.2.18.1) (PL15.2.3).
Revision F
No
3-143