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3.1 XO Block
The output frequency(19.2MHz) of XO(X4100) is used as the reference one of
WTR2965(U1500,U1501) and PM8956(U4100) internal VCO
Checking Flow
START
Check TP1.
Is it 19.2MHz?
NO
Replace X4100 and then
check TP1/TP2
Is it 19.2MHz?
NO
The Problem may be
Logic part
Refer to
Logic trouble shoot
LGE Internal Use Only
LGE Internal Use Only
XO Circuit is OK.
Check next step
YES
XO Circuit is OK.
Check next step
YES
TP1
U1500
TP1
TP2
11
3. TROUBLE SHOOTING
Image
BOTTOM
U1501
Circuit Diagram
Copyright ⓒ 2016 LG Electronics. Inc. All right
Copyright ⓒ 2016 LG Electronics. Inc. All right
reserved. Only training and service purposes
reserved. Only training and service purposes
TP2
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