LG Electronics 42LC2D(B), 32LC2D(B), 37LC2D(B) service manual Troubleshooting

TROUBLESHOOTING

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Is the Set ON?

YES

Is the input

NO

Attach the input

cable attached?

cable(s)

NO

YES

Push the POWER

ON key

Check the

Power Error

PASS

What is

Condition of all

Connectors, wafers,

the input signal

I2C In the

mode?

FAIL

system.

Check Vout

FAIL

Check 33V

And 5V at pin

RF

Signal at pin 9.

7,6 resp. of

Of Tuner

Tuner

PASS

-

PASS

Change the Tuner

17 -

Check LVDS

PASS

Check 24bit

PASS

Check Main_V

Check Sub_V

PASS

Check Vout

FAIL

RGB at AR700-

Correct the circuit

Output of Cortez

At R309

At R302

Signal at C230

AR705

PASS

Check for S/W error

FAIL

FAIL

FAIL

Replace Cortez

Check Power

Check Q303

PASS

Replace CXA2069

Circuit and 9V

Levels and crystal

PASS

at L300

Replace Hudson

FAIL

Correct the circuit

FAIL

Power Error