Philips DVP3800 Service Manual page 17

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 L101(R35) and L102(R32)
1.Whether voltage on pin14/pin15 of U1
varies between
(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.
Check opu focus
Check/Replace the loader
Go
Yes
Yes
Yes
2.4V and 3.3V
Yes
Yes
4-1
No
Correct connection
No
Check the M5V power supply
No
Check/Replace Q103,Q104.
No
Check/ Replace U1.
1. Check U1 18pin FOCUS_PWM
No
signals
2. If there are F+, F-, T+ and T-
signals output from U10.
FOCUS_PWN waveform
Trouble shooting chart