LG VX8500 Service Manual page 52
Dual band cdma pcs/cellular/w/gps cdma mobile phone
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Also See for VX8500:
- Quick start manual (13 pages) ,
- Datasheet (2 pages) ,
- Guía de inicio rápido (12 pages)
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VX8500
4.1.2.2 Checking VCTCXO Circuit
Test Point
X100. Pin3
Waveform
Graph
LG Electronics Inc.
Check X100 Pin 3
◆ Refer to Graph 4.1.1(a)
Check X100 Pin 4
◆ Refer to Graph 4.1.1(b)
X100. Pin4
60
Checking Flow (VCTCXO)
VCTCXO Circuit is OK .See
YES
next Page to check
19.2MHz
Control signal
?
No
The Problem may
+2.8V OK?
be Logic part
Refer to Logic troubleshoot
NO
YES
Changing X100
Check C149, C706
C145, R107
VCTCXO Circuit is OK.
YES
See next Page to check
Similar?
Control signal
NO
SW Download
Replace Board
Graph
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