Repairing The Main Board Assembly - Epson LX-300 Service Manual

Service
Manual

5.3 REPAIRING THE MAIN BOARD ASSEMBLY

This section
provides instructions for repairing
causes, and t%eckp-oints. Checkpoints refer to pro~r waveforms,
various symptoms, likely
resistance values, and other values to be checked when evaluating the operation of any potentially
faulty component. Check these values and take the appropriate action.
Note: This section is required only for serw"cers who repair to the component level.
Table 5-8. Repairing Problems in the Main Board Assembly
a defective main board assembly. It describes