4-11
Spindle motor does not move
Yes
Yes
No
No
No
No
Yes
Check whether “AVCC”
(+5V) voltage is normal.
Correct connection
Check the AVCC power
supply
Check/Replace Q6ǃQ5.
Check/ Replace U2.
Have no focus
1. Check U2 42pin FOO signals
2. If there are F+, F-, T+ and T-
signals output from U3.
Check/Replace the loader
Yes
Yes
No
Go
Check whether laser voltage
(2V for VCD & 2.2V for DVD)
on Collector of Q6 and Q5
Check the FFC connection
between 24P and the loader.
1. Whether voltage on pin 112 of U2
varies between 0 and 3.3V (3.3V for
VCD and 0V for DVD),
2. Whether peripheral components
are eroded or badly soldered.
Motor no move
Trouble shooting chart
Remark: Trouble shooting chart for
DVP3156/XX, DVP3166
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