Checking Gsm Block - LG L704I Service Manual

4. TROUBLE SHOOTING

4.5. Checking GSM Block

EGSM Rx
PCS Rx
DCS Rx
L16
18nH
EGSM RX
L30
NA
L17
18nH
L27
4.7nH
C1439
NA
DCS RX
L28
4.7nH
Rev 1.0
L12
3.9nH
C1440
PCS RX
0.5p
L13
3.9nH
GSM Rx block
LGE Internal Use Only
L10
15nH
L40
NA
Copyright © 2007 LG Electronics. Inc. All right reserved.
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Tx PAM Block
0.01u
C1630 C1631
6.8p 56p
R1300 0
0603
C1437
68p
L41 L57
15nH 6.8nH
15
DCS_PCS_OUT DCS_PCS_IN
11
EGSM_OUT
U569
19
Rev 1.0 RSVD_GND SKY77318
SMPY0014001
21
P_GND
GSM Tx block
Only for training and service purposes
10u
C1596
0.01u
3
4
EGSM_IN
18
ENABLE
1
BS