No laser
Does normal voltage at pin 25 of U2?
K Laser abnormal(For S&D board)
Does normal voltage at 24,22pin of U2?
Does normal Voltage at cathode of D2,D3?
Normal
YES
YES
YES
1.Check connections between M5705 and
Sp3721
2.check Sp3721 and peripheral components.
Check Sp3721 and peripheral components
YES
Check Q1 Q2 and peripheral components
Change pick up
17
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