EPSON Stylus Color 440/640/740 Revision A
Chapter 3 Troubleshooting 91
3.4 Unit Repair of the Main Board
Note:
The Main
board equipped with each printer is as follows:
Stylus Color 440: C206MAIN-B, C255MAIN
Stylus Color 640: C256MAIN
Stylus Color 740: C257MAIN
This section describes the problems related to the main controller
board. The table below provides various symptoms, likely causes, and
checkpoints. The check points refer to waveforms, resistance, and other
values to check to evaluate the operation of each component.
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