Only For Training And Service Purposes - LG KP105 Service Manual

4. TROUBLE SHOOTING
TX Trouble
TEST POINT
TP2
U401
TP3
Mode
VLOGIC (TP1)
TXON_PA (TP2)
BS (TP3)
LGE Internal Use Only
SW401
TP1
FL401
U103
X101
GSM900 TX DCS1800 TX
H(2.7V) H(2.7V)
H(2.7V) H(2.7V)
L H(2.7V)
CIRCUIT
TP2
VLOGIC
1K R405
TX_RAMP
TXON_PA
BS
C408 C409
TP3
39p 39p
GSM900 RX
H(2.7V)
L
L
Copyright © 2008 LG Electronics. Inc. All right reserved.
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TP1
C410 C411
39p 39p
6
PCS_RX VBATT
7
GSM_RX GND9
8
U401
GND1 PCS_IN
9 SKY77517
GND2 NC
10
GND3 GSM_IN
11
ANT GND8
DCS1800 RX
H(2.7V)
L
H(2.7V)

Only for training and service purposes

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