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LGE Internal Use Only
Copyright ©
LG Electronics. Inc. All rights reserved.
Only for training and service purposes
4. Digital RF Trouble shooting guide
Check RF Cable
Check IIC Signal
TU8900 #4, 12Pin
Check IIC line and level shifter circuit
Y
N
Check tuner 5V power L8906
Check L8906
Y
N
Y
Check X101
and application circuit
Check IF Signal
TU8900 #6, 8, 16 Pin
Check tuner application circuit or
replace tuner.
N
Y
Replace X101
N
Y
Replace IC101
Replace IC2304
N
Y
Replace L8906
Содержание 32LX770M
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