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PX8700
Service manual
LG PX8700 Service Manual page 78
Tri band cdma pcs/cellular/gps mobile phone
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Contents
Table of Contents
Troubleshooting
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PX8700
4.2.2.2. Check VCTCXO Circuit
Test Point
+2.9V_TCXO
Pin 4
X101
Circuit Diagram
Waveform
LG Electronics Inc.
TCXO_OUT
Pin 3
Checking Flow
Start
Check X101 Pin3
Refer to Graph 4.2.2.2
YES
Similar?
NO
Check X101 Pin4
NO
+2.9V?
YES
Replace X101
Graph 4.2.2.2
VCTCXO Circuit OK
Check U302
- 78 -
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