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Spindle motor does not move
Motor no move
Check the FFC connection
between 24P and the loader.
Check whether "M5V"
(+5V) voltage is normal.
Check whether laser voltage
(1.9V for CD & 2.4V for DVD)
on L9 and L10
1.Whether voltage on pin 23 of U1
varies between 0 and 3.3V (3.3V for
CD and 0V for DVD),
2.Whether peripheral components
are eroded or badly soldered.
Check opu focus
Check/Replace the loader
Go
Yes
Yes
Yes
Yes
Yes
5-1
No
Correct connection
No
Check the M5V power supply
No
Check/Replace Q5,Q6,Q7,Q8.
No
Check/ Replace U1.
1.
Check U1 25pin FOCUS_PWM
No
signals
2.If there are F+, F-, T+ and T-
signals output from U2.
FOCUS_PWN waveform
Trouble shooting chart
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