Trouble Shooting Chart - Philips DVP3126/94 Service Manual

Spindle motor does not move
Check the FFC connection
between 24P and the loader.
Check whether "RFA5V"
(+5V) voltage is normal.
heck whether laser voltage
C
(2.3V for DVD & 1.9V for CD) on
Collector of Q2 and Q3
1.Whether voltage on pin 129 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/Replace the loader
Motor no move
Go
Yes
Yes
Yes
Yes
Have no focus
Yes
4-1
No
Correct connection
No
Check the RFA5V power
supply
No
Check/Replace Q2 Q3.
No
Check/ Replace U1.
1. Check
No
FOCUS_PWM signals
2.If there are F+, F-, T+ and T-
signals output from U7.
FOCUS_PWN waveform

Trouble shooting chart

U1 182pin