Service manual

Troubleshooting
5-8
EPSON FX-880/FX-1180 Service Manual
START
Is the AC power line
voltage normal?
Has fuse F1 on the
power supply board
blown out?
Disconnect the power cable
from CN3 on the C229
MAIN board, and measure
the +35 volt line at pin 7 or 8
of CN2, and the +5 volt line
at pin 3 or 4.
Is the output
voltage of the
power supply
normal?
Check resistance of
printhead solenoids
and PF and CR motors.
If abnormal, replace the
defective unit.
END
Use only normal
input voltage.
Replace the fuse.
Does the fuse
blow again?
Replace the power
supply board.
Is the problem
solved?
Replace the main
board.
NO
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
Is the problem
solved?
NO
Flowchart 1. The Printer Does Not Operate at Power-On
THE PRINTER DOES NOT
OPERATE AT POWER-ON