Trouble shooting chart | |
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Spindle motor does not move
Motor no move
Go
Check the FFC connection between 24P and the loader.
Yes
Check whether “M5V” (+5V) voltage is normal.
Yes 
Check whether laser voltage
(1.9V for CD & 2.4V for DVD)
on L101(R35) and L102(R32)
Yes
1.Whether voltage on pin14/pin15 of U1 varies between 2.4V and 3.3V (PIN14=2.4V and PIN15=3.3V for CD; PIN14=3.3V and PIN15=2.4V for DVD), 2.Whether peripheral components are eroded or badly soldered.
No
No
No
No
Correct connection
Check the M5V power supply
Check/Replace Q103,Q104.
Check/ Replace U1.
Yes 
Check opu focus
Yes
Check/Replace the loader
1.Check U1 18pin FOCUS_PWM
No | signals |
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2.If there are F+,
FOCUS_PWN waveform
