LG Electronics 42LC2D(B), 32LC2D(B), 37LC2D(B) service manual TROUBLESHOOTING RF/Component/PC

TROUBLESHOOTING RF/Component/PC

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	Push the POWER		Turn OFF the Mute
	ON key
		YES
	Is the		Is the
No Audio
	Set ON?		Mute ON?

	Check the
	RF SIF, Component
Check the interfacing ciruit of
	L/R and PC L/R signal across
Analog Tuner, component
	R212, R171-170, R505-506,
and PC audio accordingly
	respectively according to The
w.r.t the mode.
	corresponding mode
	On jack board

Increase the Volume

Is Volume level

Of the set 0?

Correct them

Check the

Condition of all

Connectors, wafers,

I2C In corresponding

Signal flow?

Replace NSP

-

Replace the MSP

Check the	Check audio
supply voltage 8V	output at MSP across
across L403	R429-431.

Power Error

Check the

PWM output of NSP

across R436-439

Check the

Amplifier output level

At L423-426

There may be some error in Audio source.

Check

3.3V supply across

L402 and 1.8V at

C448

Power Error

Check 18V

supply at L421

Replace TAS5122(amp)