SERVICE MANUAL
PAGE:
14
TROUBLE SHOOTING
Check IC601
Audio Inputs
Pin#47.48=PC L.R
50.51=Compo L.R
56.57=A/V L.R
60=RF Mono
OK?
Check IC601 Outputs
Pin #27.28=L.R Out
30=Woofer Out
OK?
YES
Check IC651.652
Audio outputs
Each pin #7.#11
OK?
Check external
Input audio source
Check IC601 VCC
and Replacement
YES
NO
Check IC605
Pin #10 Vcc &
Pin #8 Mute
(Pin #8 Low=Mute)
and Replacement
YES
Check Speaker
and Replacement
NO
NO
Summary of Contents for LC3050
Page 24: ...SERVICE MANUAL PAGE 22 PCB LAYOUT CONTROL PCB 1 TOP COMP PATTERN 2 BOTTOM COMP PATTERN ...
Page 25: ...SERVICE MANUAL PAGE 23 PCB LAYOUT Main PCB TOP COMP ...
Page 26: ...SERVICE MANUAL PAGE 24 PCB LAYOUT Main PCB TOP PATTEN ...
Page 27: ...SERVICE MANUAL PAGE 25 PCB LAYOUT Main PCB BOTTOM COMP ...
Page 28: ...SERVICE MANUAL PAGE 26 PCB LAYOUT Main PCB BOTTOM PATTEN ...