The Disc Does Not Playback - Sharp CD-C500Z Service Manual

Is the disc initialized?
Does the tracking servo operate normally?
Is the EFM signal of pin 36 of IC2 flat? (Lower side)
Is the tracking error signal (pin 2 of IC2) being output?
I
In the stop mode, is the tracking coil drive output (pin 4 of '
Yes
Is the tracking coil drive output being output from the
tracking driver output (pin 2 of IC4)?
The pickup connecting connector is broken.
The pickup tracking coil is broken.
Yes
Normal
Yes
Yes
. ,
A Check the item of " The laser diode goes on."
Yes
Replace the disc or change the program.
Is the tracking signal being output
No
from the oickuo main unit?
I
In the stop mode, adjust the tracking offset to 0 ' I 50mV.
N
O
The PWB negative pattern is damaged.
on." 1
,
,