LG -D175F Service Manual page 56

3.2.1.2 Checking XO circuit
Replace X4100 and then check
LGE Internal Use Only
START
Check TP1(C1513)
Is it 19.2MHz?
NO
TP1(C4104)
Is it similar ?
NO
Replace Main B/D
YES
XO circuit is Ok . See next page
to check RF signal path.
YES
XO circuit is Ok . See next page
to check RF signal path.
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3. TROUBLE SHOOTING
Only for training and service purposes