LG KG271 Service Manual page 51

4. TROUBLE SHOOTING
TX Trouble
TEST POINT
Mode
VC1
VC2
SW400
FL400
FL401
U400
U102
X101
GSM900 TX DCS1800 TX
H(2.7V)
L
CIRCUIT
TP400 TP401 TP402
VC1
VC2
C417 C418
27p 27p
GSM800 RX
L
H(2.7V)
- 52 -
TP403 TP404 TP405
R400
NA
R401 0
C400 1p
L401 22nH
SW400
RF500
C410
22p
FL400 LMSP2PAA-575TEMP
9
IN GSM1800_1900TX
GSM1800_1900RX
3
VC_GSM850_900TX
7
VC_GSM1800_1900TX
5
GND1 GSM850_900TX
8
GND2 GSM850_900RX
10
GND3
DCS1800 RX
L L
L L
1
6
2
4