Cd Part - LG FA162 Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE OF CD PART

2. CD PART

Turn on CD.
YES
Check
Open/ Close.
YES
Check
"READING" display.
YES
DISC reading is OK?
YES
If play,
audio output check.
YES
OK
NO
Check connector CN403.
Check voltage
IC401 Pin8, 19: 5 V.
Check CN403
Pin3: Open, Pin4: Close.
NO
Check connector
CN401, CN403.
Check μ-com interface circuit(CN403)
(CE, BTL-MUTE, CD-IN,
CDOUT, CLK, WRQ, FSEQ)
NO
Check connector
CN401, CN403.
Check pick-up movement.
Check IC401 (S3053).
Check IC400 (BU9543KV).
Check audio data (IC400)
NO
Pin35 LRCK, Pin36 BCK,
Pin34 DATA.
3-17
YES
NO
YES
YES
YES
YES
YES
YES
Refer to
SMPS troubleshooting.