
3-17
ELECTRICAL TROUBLESHOOTING GUIDE
NO
NO
YES
YES
Check RF connections
between MPEG
and Pick up head
Check cable connection on
pick-up head.
NO
YES
YES
YES
YES
YES
Check cable connection on
pick-up head.
Check RF signal waveform.
Focus on OK?
Is RF
signal A,B,C,D,of MPEG IC
properly?
NO
NO
Check TRSO connection
between MPEG
and Motor driver IC
Track on OK?
Disc is play?
Is the
TRSO signal on MPEG IC
properly?
NO
Check the tracking control
amp circuit on motor driver
Is T+
& T-pin outputs
properly?
NO
NO
Check FOSO connection
between MPEG
and Motor driver IC
Is the
FOSO signal on MPEG IC
properly?
YES
Check the focus control
amp circuit on motor driver
Is F+
& F-pin outputs
properly?
D
E
jomi