Epson LQ-570e - Page 66

EPSON LQ-570e/LQ-580 Revision C
T
roubleshooting
U
nit Repairing of the Power Supply Board
6
6
+35V line is defective. PC1 is defective.
Verify the waveform at pin 7 or 8 of PC1.
Replace the C293PSB/PSE board.
The printer does not operate at all.
+5V line is defective. Regulator IC (IC51) is defective.
Verify the waveform at pin 5 of IC51.
Replace the C293PSB/PSE board.
Verify the waveform at pin 9 or 10 of IC51.
Replace the C293PSB/PSE board.
Table 3-1. Repair of the C293PSB/PSE
Symptom Condition Cause Check point Solution