Audio Circuit; No Atsc Audio - LG LSS-3200A Service Manual

2. AUDIO CIRCUIT

1) NO ATSC AUDIO

(1) Check IC400 and Surroundings
1.8V & 3.3V are supplied to IC400?
YES
Data is input from TU300 to IC402 &
403(3, 6,10,13)?
YES
Logic High is input to IC401& 402 &
403(1)?
YES
Data is output from IC402 & 403
(4,7,9,12)?
YES
Data is output from R424? Fig. 01
YES
3.072MHz clock is output from R422?
F . 02
IG
YES
48kHz clock is output from R421?
Fig. 03
NO
Check the Power Supply Part.
NO
NO
NO
Check IC402 & 403.
NO
Check or Replace the D102.
NO
NO
3-7
Check Tuner Part.
Check IC201(36).