Epson AcuLaser C4000 Service Manual page 293

EPSON AcuLaser C4000/C4100/C3000
FIP-OP4 Incorrect printer operation
Printer operation is unstable.
Step
Initial setting
Do the following checks show a problem?
• PWBA MCU & HVPS (PL15.1.2)
1
• PWB Controller (PL16.1.5)
• LVPS (PL15.1.10)
• Harness Assy LVNC (PL15.2.1)
Printer engine
2 Carry out a test print.
Does the test print complete normally?
5V DC power supply
1. Disconnect P/J61 from the PWB Drive (PL15.1.15).
3
2. Measure the voltage between P61-8 <=> P61-7.
Is the voltage 5V DC between J61-8 <=> J61-7?
3.3V DC power supply
1. Leave the P/J61 connector of the PWB Drive (PL.15.1.15) disconnected.
4
2. Measure the voltage between P61-6 <=> P61-5.
Is the voltage 3.3V DC between J61-6 <=> J61-5?
Harness Assy LVNC (PL15.2.1)
1. Leave the P/J61 connector of the PWB Drive (PL.15.1.15) disconnected.
2. Disconnect P/J165 from the LVPS (PL15.1.10).
3. Check the continuity for the following lines.
5 P165-1 <=> P61-8
P165-2 <=> P61-7
P165-3 <=> P61-6
P165-4 <=> P61-5
Is there continuity in all lines between P165 <=> P61?
Reset
6 Carry out a test print.
Is the printer Reset after test printing is carried out?
Troubleshooting
Check
Level 2 FIP
Treatment
Yes
Repair or replace the applicable
Go to step 2.
part.
Go to step 7. Go to step 3.
Go to step 4. Go to step 5.
Go to step 6. Go to step 5.
Replace the Harness Assy
Go to FIP-DC (Page 5-280).
LVNC (PL15.2.1).
Go to FIP-Noise (Page 5-281). Go to step 7.
Revision F
No
3-277