3-16
ELECTRICAL TROUBLESHOOTING GUIDE
NO
NO
YES
YES
YES
Check connections
between SPHE8202RQ-D
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 PUHRF
signal waveform.
Focus on OK?
Proper
signals on A,B,C,D of
SPHE8202RQ-D
NO
NO
Check the TCO
connection on SPHE8202RQ-D
and motor driver
Track on OK?
Disc is play?
Properly
TCO signal on
SPHE8202RQ-D?
NO
Check the tracking control
amp circuit on motor driver
RAD+ &
RAD- output
properly?
NO
NO
Check the FCO
connection on SPHE8202RQ-D
and motor driver.
Check the focus control
amp circuit on motor driver
Check
FCO signal on
SPHE8202RQ-D
FOC+ &
FOC- output
properly?
E
D
