LG VX11000 Service Manual page 71

VX11000
Replace U 1003 and then check R1002 , Pin3.
Figure 4.2.1.2 (a)
LG Electronics Inc.
Checking Flow
Checking Flow
Start
Check U1003 TP2
Is it 19.2MHz? (Refer to
figure (a))
4.2.1.2
NO
Check U1003 TP1
Is it 2.85V? (Refer to
figure (b))
4.2.1.2
YES
Is it similar?
NO
Replace Main B /D
VCTCXO circuit is Ok . See next page
YES
The Problem ma y b e Logic part
R efer to Logic troubles hoot
NO
VCTCXO circuit is Ok . See next page
YES
Waveform
Waveform
to check control signal .
to check control signal .
Figure 4.2.1.2 (b)
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