LG KM710 Service Manual - Page 47
DCXO Circuit
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4. Trouble Shooting 4.2.1.2 DCXO Circuit R401 X400 C408 C408 68p B8 VCXTCXO A9 XOP X400 FA-23H 4 3 1 2 R401 47K 26MHz XON B9 C8 GNDVCXO_OR D7 VOUTEF2 DCXO Circuit Diagram DCXO R401 26MHz? NO Check U401 YES DCXO is OK. LGE Internal Use Only - 48 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes
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- 48 -
4. Trouble Shooting
4.2.1.2 DCXO Circuit
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
X400
C408
R401
DCX
O
R401 26MH
z?
NO
YES
Ch
eck U401
DCXO is OK.
FA-23H
X400
1
2
3
4
26MHz
68p
C408
VCXTCXO
B8
D7
VOUTEF2
B9
XON
XOP
A9
C8
GNDVCXO_OR
R401
47K
<Fig.2> DCXO Circuit Diagram