Only For Training And Service Purposes - LG KG290 Service Manual

(1) Checking Crystal Circuit
TEST POINT
C547
R520
X500
CIRCUIT
WAVEFORM
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Only for training and service purposes

U502
C543
1000p
VCC
2
GND
Graph 4.3.1(a)
4. TROUBLE SHOOTING
CHECKING FLOW
Yes
26 MHzO.K?
No No
Change X500
2V75_VVCXO
5
4
3
C547
R520
2.2u
1M
Graph 4.3.1(b)
- 63 -
Crystal Circuit is OK
See next Page to check See next Page to check
Mobile SW Mobile SW
26M_DBB
LGE Internal Use Only