Tuner Function Check - LG MBD-D102X Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART

9. TUNER FUNCTION CHECK

TUNER function check
YES
Check
TUNER module (TUN800)
is working.
YES
Check IC200
(BU4052) 1, 12PIN input
waveform.
YES
Check IC200 (BU4052)
3, 13PIN output waveform.
YES
Check IC801
(MC4580) 2, 6PIN input
waveform.
YES
OK
NO
Check TUNER MODUEL
power (Check 2PIN 9V)
Check IC200
NO
(BU4052) 16PIN VDD,
8PIN VSS power
Replace the related parts
Check IC801
NO
(MC4580) 4PIN VSS,
8PIN VDD power
Replace the related parts.
3-9
NO
YES
NO
YES
Check u-COM (IC100)
3, 69PIN communication.
Refer to SMPS
Troubleshooting.