LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 41 -
(1) Checking Crystal Circuit
TP1
26 MHzO.K?
No
No
Crystal Circuit is OK
See next Page to check
Mobile SW
See next Page to check
Mobile SW
Yes
Change X501
1M
R509
C512
47p
3
GND
2
IN
4
OUT
VCC
5
U501
SN74AHC1GU04DCKR
2.2u
C513
2V75_VVCXO
R507
0
26M
VC_26M
TEST POINT
CHECKING FLOW
CIRCUIT
WAVEFORM
Graph 4.3.1(a)
Graph 4.3.1(b)
TP1
Summary of Contents for KP110
Page 121: ...Note ...
Page 122: ...Note ...