Epson GT-9000 Service Manual page 75

Troubleshooting
SUPPLY BOARD
5.4 REPAIR OF THE POWER
This section provides instructions for repairing a defective power supply board. Servicers
who do
repair to the component level (including all servicers in the US.) can ignore this section.
not
This table describes various problems, likeIy causes, checkpoints, and solutions. The dwckpoint
column provides proper waveforms, resistance values, and other values to be checked to evaluate
the operation of any component that might be bad. Check these values and take the appropriate
action.
Table 5-14. Repair of the Power Supply Board
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Rev. A