Service manual

EPSON FX-880/FX-1180 Service Manual
5-i
5. Troubleshooting
Overview .................................................................................................................................................... 5-1
Motors................................................................................................................................................ 5-2
Motor Drivers......................................................................................................................... 5-3
Printhead ........................................................................................................................................... 5-4
Printhead Driver..................................................................................................................... 5-5
Sensors.............................................................................................................................................. 5-6
Power Supply..................................................................................................................................... 5-6
Unit Level Troubleshooting ........................................................................................................................ 5-7
Flowchart 1 – Printer Does Not Operate at Power-On ...................................................................... 5-8
Flowchart 2 – Abnormal Carriage Operation ..................................................................................... 5-9
Flowchart 3 – Problem With Printing During Self-test ..................................................................... 5-10
Flowchart 4 – Printer Does Not Feed the Paper Correctly ...............................................................5-11
Flowchart 5 – Abnormal Control Panel Operation ........................................................................... 5-12
Flowchart 6 – Fails to Print from PC................................................................................................ 5-13
Repairing the Power Supply Circuit Board............................................................................................... 5-14
Repairing the Main Board Assembly........................................................................................................ 5-17
Repairing the Printer Mechanism............................................................................................................. 5-21