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5-1
Spindle motor does not move
Yes
Yes
No
No
No
No
Yes
Check whether “RFA5V”
(+5V) voltage is normal.
Correct connection
Check the RFA5V power
supply
Check/Replace Q4ǃQ5.
Check/ Replace U2.
Have no focus
1. Check U2 pin89 FOCUS_PWM
signals
2.If there are F+, F-, T+ and T-
signals output from U4.
Check/Replace the loader
Yes
Yes
No
Go
Check whether laser voltage
(2.3V for DVD & 1.9V for CD)
on Collector of Q4 and Q5
Check the FFC connection
between 24P and the loader.
1.Whether voltage on pin 97 of U2
varies between 0 and 3.3V (3.3V for
CD and 0V for DVD),
2.Whether peripheral components
are eroded or badly soldered.
Trouble shooting chart
Motor no move
FOCUS_PWN waveform