Epson AcuLaser C4000 Service Manual page 172

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 (PL15.1.2).
2. Check the continuity for the following lines.
14 J13-1 <=> J139-11
J13-2 <=> J139-10
J13-3 <=> J139-9
Is the continuity between J139 <=> J13 normal?
Sensor Paper (PL7.1.4) (Dup Jam) check
1. Replace the Sensor Paper. (Refer to Ch4-4.2.10.2)
15
2. Carry out duplex printing.
Does the error still occur?
Exit Roll
16 Turn the Exit Roll of the Fuser Assy (PL.9.1.1) manually.
Does the Exit Roller turn smoothly when it is turned manually?
Motor Assy Dup (PL8.1.8) operation check
17 Carry out duplex printing.
Does the paper turn over when duplex printing is carried out?
Motor Assy Dup (PL8.1.8) check
1. Install the PDH Assy.
18
2. Use the Motor Assy Dup diagnosis tool to carry out a Digital Input Test.
Is the Motor Assy Dup functioning normally?
Motor Assy Dup (PL8.1.8) power supply
1. Remove the PHD Assy (PL11.1.3).
19 2. Turn On the I/L Switch.
3. Measure the voltage between P/J50-1 <=> P/J60-2 of the PWB Drive.
Is there +24V DC between P/J50-1 <=> P/J60-2?
PWB Drive (PL15.1.15) power supply circuit continuity
1. Remove the PHD Assy (PL11.1.3).
20 2. Turn On the I/L switch.
3. Measure the voltage between P60-1 <=> P/J60-2 of the PWB Drive.
Is there 24V DC between P/J60-1 <=> P/J60-2?
Troubleshooting
Check
Level 2 FIP
Treatment
Yes
Replace the Harness Assy Front 1
Go to step 16.
(PL15.2.7).
Go to step 16. End of procedure
Replace the parts that are
Go to step 17. preventing the rollers from
turning.
• With the tool:
Go to step 18.
Go to step 23.
• Without the tool:
Go to step 19.
Go to step 22. Go to step 19.
Replace the PWB Drive.
Go to step 20.
(Refer to Ch4-4.2.18.5)
Replace the PWB Drive.
Go to step 21.
(Refer to Ch4-4.2.18.5)
Revision F
No
3-156