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4. TROUBLE SHOOTING
4.17.3 Checking PAM Block
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
10 dB
8 dB
2
G1
3
G2
5
G3
1
IN
4
O1
+VPWR
EFCH897MTDB1
FL101
100p
C135
68
R107
91
R109
91
R108
120
R112
R113
120
C133
68p
R106
2.2K
R111
51
RSVD3
12
1
TX_EN
VAPC
6
5
VBATT
31
PGND15
PGND16
32
PGND17
33
34
PGND18
35
PGND19
PGND2
18
PGND20
36
19
PGND3
20
PGND4
PGND5
21
22
PGND6
23
PGND7
PGND8
24
PGND9
25
RSVD1
4
RSVD2
8
3
BS
2
DCS_PCS_IN
DCS_PCS_OUT
16
10
GND1
11
GND2
GND3
13
14
GND4
GND5
15
GSM_IN
7
GSM_OUT
9
PGND1
17
26
PGND10
27
PGND11
28
PGND12
PGND13
29
PGND14
30
U101
SKY77329
C145
1000p
22u
C128
tcc_16085h_9_r
C146
1000p
DCS_PCS_TX
GSM_TX
GSM_PA_EN
GSM_PA_RAMP
GSM_PA_BAND
[Fig. 4.19] Schematic of PAM Block
[Fig. 4.20] Test Point of PAM Block
[Table 3.8] HKADC channel table
Test Point
Net name
Description
TP1
GSM_PA_RAMP
Power Amp Gain Control. Typically, 0.2 ~1.6V
TP2
GSM_PA_EN
Power Amp Enable (ON : >2.5V, OFF : <0.7V)
TP3
+VPWR
PAM Supply Voltage (Vcc > 3V)
TP3
TP2
TP1
Summary of Contents for KF700
Page 1: ...Service Manual Model KF700 Service Manual KF700 Date May 2008 Issue 1 1 Internal Use Only ...
Page 193: ...Note ...
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