Trouble Shooting Chart - Philips DVP3550K Service Manual

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 and L102
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
5-1
No
Correct connection
No
Check the M5V power supply
No
Check/Replace Q103,Q104.
No
Check/ Replace U1.
No
1.Check U1 18pin FOCUS_PWM signals
2. If there are F+, F-, T+ and T- signals
output from U10.
FOCUS_PWN waveform

Trouble shooting chart