No sound
If Any audio signal input or
amplifier power supply normal
Check
External audio
equipment
：
Amplifier power
supply circuit
U1
（
NS4263
）
6/11
Pin have signal input
N
Y
Y
N
Check the Volume,
MUTE settings
Reset
If any signal
output of J5/J7
Y
N
Check
external
Speaker
Check amplifier
power supply circuit
Check U6 audio input pin
has the signal output
N
Y
N
Y
Maintenance U6
Maintenance U1 & U6
Connect part
network
Figure.4 Audio Unit (no sound)
Summary of Contents for TF-LED15S27
Page 1: ...Service Manual Part1 Exploded View Part2 Circuit Diagram Part3 Common problems solution ...
Page 2: ......
Page 3: ......
Page 4: ......
