Teac LEDV2282FHD - Page 13

NO sound
Any audio signal input or
Is amplifier power supply normal
Check audio
equipment:
power amplifier
circuit
Check U20（TPA1517）#1/9
pin whether or not normal
N
Y
Y
N
Check
Q24,Q25
external circuit
Volume, MUTE set
Whether or not normal
Reset
check CON12 any
signal output
Y
N
Examine
external
Speaker
Check power
Circuit of Q1,
if power supply
is normal,
change Q1
Check Q25,Q24 #3 pin
Whether there is a signal output
N
Y
N
Check the network
connects U20 and
Q24,Q25
Picture 4 Audio Unit (NO sound)
Y