Read LG 37LC2DB (CHASSIS:LD61A) Service Manual online
- 27 -
No Audio
Push the POWER
ON key
Replace the MSP
Power error or
replace CXA2069
Power Error
Check the interfacing ciruit of
AV1,2,3 and AV4/S-Video
accordingly w.r.t the mode.
Check
the Condition
of all Connectors,
wafers, I2C In
corresponding
Signal
flow?
Check the
supply voltage 8V
across L403
Check the
AV L/R output
At R377,376
Check
audio output at MSP
across R429-431.
Is the
Set ON?
YES
Turn OFF the Mute
Is the
Mute ON?
Check the
PWM output of NSP
across R436-439
Check
3.3V supply across
L402 and 1.8V at
C448
Check the
Amplifier output level
At L423-426
Check 18V
supply at L421
Increase the Volume
Is
Volume level Of
the set 0?
Check the
AV1,AV2 ,AV3,
AV4/S-Video L/R signal
across R136-138, R135-137,
R157-158, R174-175 respectively
according toThe
corresponding mode
On jack board
Correct them
Replace NSP
Power Error
Replace
TAS5122(amp)
There may be some
error in Audio
source.
TROUBLESHOOTING A
V1, 2, 3, 4/S-V
ideo
Click on the first or last page to see other 37LC2DB (CHASSIS:LD61A) service manuals if exist.