Read LG 37LC2DB (CHASSIS:LD61A) Service Manual online
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No Audio
Push the POWER
ON key
Replace the MSP
Power error or
replace
IC605(TC74LCX157)
Power Error
Check the interfacing ciruit of
HDMI or replace STi5100
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
MUX I2S output
At R491,493,494 On
jack board
Check audio
output at MSP across
R429-431.
Check the
PWM output of NSP
across
R436-439
Check the
Amplifier output level
At L423-426
Check 18V
supply at L421
Check
3.3V supply across
L402 and 1.8V at
C448
Is the
Set ON?
Check the DTV
HDMI I2S signal atR183,
184,186 and R1218-1220
respectively according to The
corresponding mode On
main board
YES
Turn OFF the Mute
Is the
Mute ON?
Increase the Volume
Is
Volume level Of
the set?
Correct them
Replace NSP
Power Error
Replace
TAS5122(amp)
There may be some
error in Audio
source.
TROUBLESHOOTING DTV/HDMI-Audio
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