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

Models: 37LC2D(B) 42LC2D(B)

1 61
Download 61 pages 11.98 Kb
Page 29
Image 29
TROUBLESHOOTING RF/Component/PC

TROUBLESHOOTING RF/Component/PC

- 29

 

 

 

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)

Page 29
Image 29
LG Electronics 42LC2D(B), 32LC2D(B), 37LC2D(B) service manual TROUBLESHOOTING RF/Component/PC