Only For Training And Service Purposes - LG KP210 Service Manual

4. TROUBLE SHOOTING
(2) Checking Mobile SW & Rx SAW filter
TEST POINT
CIRCUIT
OUT401 OUT402 OUT403
L421 4.7nH
L422 4.7nH
SW401
RF500
C418 1000p
TP3
L401
39nH
LGE Internal Use Only
SW401
TP3
OUT404
PART_NO SMRH0004701
IN CASE OF GSM900/DCS1800
CHANGE THIS TXmodule
TO PART_NO SMRH0004501
6
PCS_RX
7
GSM_RX
U401
8
GND1
9
SKY77517
GND2
10
GND3
11
ANT
C422
NA
TP5
TP6
TP5
TP6
C402 C403 C404
39p
68p 27p
VBAT
C410 C411 C412 C413
12p 0.01u 18p 33p
1
VBATT
20
GND9
19
PCS_IN
18
NC
17
GSM_IN
16
GND8
C423
FL401 B9310
1 9
I1 O1_1
8
O1_2
7 C425
O2_1
C426
4 6
I2 O2_2
2 3 5 10
SFSB0001301
C431
Copyright © 2008 LG Electronics. Inc. All right reserved.
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TP4
TP4
R406 100ohm
PA_BAND
R407 100ohm
PA_EN
R410 68
TX_RAMP
R411 100ohm
ANT_SW1
C405
27p
R412
24
R413
220
C409
22u
R417
30
R416
180
3p
L402
5.1nH
3p
3p
L403
18nH
3p

Only for training and service purposes