Only For Training And Service Purposes - LG MG295 Service Manual

(1) Checking Crystal Circuit
TEST POINT
X501
CIRCUIT
WAVEFORM
Graph 4.2.1(a)
Copyright © 2007 LG Electronics. Inc. All right reserved.

Only for training and service purposes

R508
U501
MC74VHC1G04DFT2G
C511
5
1000p
VCC
2 4
GND
3
R509
1M
- 41 -
4. TROUBLE SHOOTING
CHECKING FLOW
Yes
26 MHzO.K?
No No
Change X501
2V75_VVCXO
C515
2.2u R508
0
Graph 4.2.1(b)
Crystal Circuit is OK
See next Page to check See next Page to check
Mobile SW Mobile SW
26M_DBB
26M_BT
LGE Internal Use Only