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3. TROUBLE SHOOTING
The output frequency(19.2MHz) of XO(X4100) is used as the reference one of WTR2965 and PM8940 internal VCO
3.1.1 Checking XO Block
Image
Checking Flow
Check TP1/TP2
Is it 19.2MHz?
START
The Problem may be
Logic part Refer to
Logic trouble shoot
Replace X4100 and then
check TP1/TP2
Is it 19.2MHz?
XO Circuit is OK.
Check next step
XO Circuit is OK.
Check next step
NO
NO
YES
YES
Circuit Diagram
U1800
(WTR2965)
TP1(XO_IN)
TP1(XO IN)
BTM
3.1 Checking XO Block
U1801
(WTR2965)
TP2 (XO_IN)
BTM
TP2(XO IN)
12
Содержание LG-M700TV
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