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7. Analog RF Audio Trouble Shooting guide
Check RF cable & signal.
Y
Check TU6500 Pin6.
(SIF output)
Y
Check Audio AMP output L5402,
L5403, L5404, L5405.
Y
Check IC5400.
Y
Check C352.
(SIF signal to IC105)
Y
Replace IC105.
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Only for training and service purposes
N
Replace Tuner.
N
Replace L5402, L5403, L5404, L5405.
N
Replace IC5400.
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LGE Internal Use Only
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