LG KG271 - Page 51

4. TROUBLE SHOOTING
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TX Trouble
U400
SW400
U102
FL400
X101
FL401
TEST POINT
TP403
C410
22p
R403
0
C400 1p
TP401
SW400
RF500
ANT
G1 G2
RF
TP404
TP402
C417
27p
2.2nH
L400
C418
27p
TP405
0R401
R400
NA
TP400
FL400
5
GND1
GND2
8
GND3
10
GSM1800_1900RX
6
1
GSM1800_1900TX
GSM850_900RX
4
2
GSM850_900TX
9
IN
VC_GSM1800_1900TX
7
3
VC_GSM850_900TX
LMSP2PAA-575TEMP
22nHL401
VC2
VC1
CIRCUIT
Mode GSM900 TX DCS1800 TX GSM800 RX DCS1800 RX
VC1 H(2.7V) L L L
VC2 L H(2.7V) L L