LG VX11000 - Page 43

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LG Electronics Inc.
VX11000
Waveform
Waveform
Figure 4.1.1 (a)
Figure 4.1.1 (b)
Checking Flow
Checking Flow
Check U1003 TP2
Is it 19.2MHz? (Refer to
figure 4.1.1 (a))
NO
Start
Replace Main B /D
VCTCXO circuit is Ok . See next page
to check control signal .
The Problem may be Logic part
Refer to Logic troubleshoot
YES
NO
NO
Check U1003 TP1
Is it 2.85V? (Refer to
figure 4.1.1 (b))
Replace U1003 and then check R1002 , Pin3.
YES
Is it similar?
VCTCXO circuit is Ok . See next page
to check control signal .
YES