No
Yes
H Laser abnormal
No laser
Normal
Yes
Yes
No
No
Is LD pin of XS
3
(19,23) 4.5V?
Check connection between pickup
and decoder ass'y.
Replace pickup.
Does voltage at LD pin of D2?
Check connection between LD pin of
MT1389 and LD pin of XS
3
.
Check MT1389 and peripheral components.
Does noraml voltage at VCC
pin of D2?
Check MT1389 and peripheral components.
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