Daewoo DSC-30W60N Service Manual page 24

Audio signal output is only R and L.
There are no sound to Center, SL, SR, and Woofer.
AV Signal
Check if the audio signals are input to the follow
pins of IC210 (CXA1855).
Video 1 : L to pin 44, R to pin 46
Video 2 : L to pin 8, R to pin 10
Video 3 : L to pin 25, R to pin 26
Video 4 : L to pin 2, R to pin 4
YES
Decoder
R, L
Check if R, L signals are output to IC215.
Audio L : pin 28, Audio R : pin 27
YES
No sound (NTSC)
Check if R, L signals are output to IC210.
Audio R : pin 32, Audio L : pin 33
Check if R, L signals are input and output to IC215.
Audio L input : pin 50, Audio L output : pin 37
Audio R input : pin 51, Audio R output : pin 36
YES
Check if R, L signals are input to IC215
DEC_L : pin 56, DEC_R : pin 57
YES
A1
Check the audio base-band signal to SIF of U101.
Amplitude of SIF : 800mVp-p ± 100mVp-p
SIF is to pin 67 of IC215.
YES
YES
NO
Check IC215
NO
IC215 controls the volume of R, L.
The balance control is performed to DTV
decoder module.
23
Troubleshooting charts
RF Signal
YES
NO
Check IC210
NO
Check IC215
To DTV Decoder module