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10. Digital / Analog TV No sound
Check RF cable & signal
OK
Check Tuner power
L3704 : 3.3V
OK
Check Tuner I2C
R3716, R3717, R3738, R3739
OK
Check SIF,CVBS signal
Q3700, Q3701 pin
OK
Follow procedure
"9. All source audio"
11. AV No sound
Check AV cable
OK
Check Jack Audio signal
L : R2802
R : R2803
OK
Check audio signal
L : R2802, C2803, R2810
R2815, C216
R : R2803, C2802, R2811
R2816, C219
OK
Follow procedure
"9. All source audio"
Copyright ©
LG Electronics. Inc. All rights reserved.
Only for training and service purposes
NG
Replace L3704
NG
Replace R3716, R3717, R3738,
R3739
NG
Replace Tuner
NG
Replace Jack JK2802
NG
Replace audio signal component
L : R2802, C2803, R2810
R2815, C216
R : R2803, C2802, R2811
R2816, C219
- 21 -
NG
Replace Tuner
or IC101
or Main Board
LGE Internal Use Only
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