Service manual

Troubleshooting
EPSON FX-880/FX-1180 Service Manual
5-17
Repairing the Main Board Assembly
This section describes how to identify and repair problems with the C229 MAIN board. The table below
lists symptoms, likely causes, and solutions to various problems. The checkpoints refer to waveforms,
resistances, and other values that should be present when the component is working properly.
Sometimes, the same solution may be offered for an entire class of problems; in this case, the
checkpoints should be used for reference or as aids to further investigation.
Figure 5-4. Main Board Layout
CN3
PF Motor Driver IC CR Motor Drive IC Gate array
E05B50
Print Head Driver
EEPROM
PSRAM
PROM
CPU