Troubleshooting Chart - Philips PET717 Service Manual

Spindle motor does not move
Motor no move
Check the FFC connection
between 24P and the loader.
Check whether "RFVCC"
(+5V) voltage is normal.
Check whether laser voltage
(2.3V for DVD & 1.9V for CD)
on Collector of Q18 and Q19
Whether peripheral components are
eroded or badly soldered.
Have no focus
Check/Replace the loader
Go
Yes
Yes
Yes
Yes
Yes
5-1
No
Correct connection
No
Check the RFVCC power
supply
No
Check/Replace Q18 Q19.
No
Check/ Replace U3.
1.Check U3 pin182 FOCUS_PWM
No
signals
2.If there are F+, F-, T+ and T-
signals output from U5.
Trouble shooting chart