Fip-1.37 No Power Is Applied - Epson ColorPage EPL-C8000 Service Manual

EPSON EPL-C8000

FIP-1.37 No Power is Applied.

Step Check point
Perform the preliminary inspection.
Parts to inspect:
1
P/H HARNESS ASSY, REGI. HARNESS ASSY, MAIN
HARNESS ASSY, MCU PWB
Check: Controller PWB for power supply voltage
1. Remove the Controller PWB and turn the printer on
after a few minutes.
2. Measure the voltage at the pins below to confirm that
there is no electrical shortage:
2
• P33-6PIN<=>P33-8PIN: 5VDC
• P33-5PIN<=>P33-7PIN: 5VDC
• P33-3PIN<=>P33-4PIN: 5VDC
l
Is there electrical shortage in any part?
Check: Power supply voltage for short-circuited parts
1. Disconnect any connector but J12 and J21 and turn the
printer on.
2. After a few minutes, measure the voltage at the pins
below:
• P33-6PIN<=>P33-8PIN: 5VDC
3
• P33-5PIN<=>P33-7PIN: 5VDC
• P33-3PIN<=>P33-4PIN: 5VDC
3. Repeat the steps 1 and 2 until all connectors except for
J12 and J21 are removed.
l
Is there electrical shortage in any part?
Chapter 5 TROUBLESHOOTING
Remedy
Yes
Replace/reinstall the defective part(s).
Check the Controller PWB.
If the problem still occurs, go to step 3.
Replace the short-circuited part.
No
Go to Step 2.
Go to Step 3.
Replace the MCU PWB.
Rev. B
5-52