Circuit Diagram - LG KF690 Service Manual

7. CIRCUIT DIAGRAM

1 1 2 2 3 3
SW101
SW100
FL100
KMS-507
DGM112M02
G1
12
C100
G2 PCN_RX1
1 13
G2
G3 ANT ANT RF ANT PCN_RX2
G1
A A 100p
20369-001E 14
PCS_RX1
2 15
GND1 PCS_RX2
3
GND2
8 16
GND3 EGSM_RX1
10 17
GND4 EGSM_RX2
20
GND5
22 18
GND6 GSM850_RX1
23 19
GND7 GSM850_RX2
24
GND8
21
WCDMA_2100
9
PCN_PCS_TX
11
GSM850_EGSM_TX
VREG_RF_SMPS
ANT_SEL0
ANT_SEL1
ANT_SEL2
B B
C108 C109
C111 C112
0.1u
10n 10n 10n
C C
D D
E E
GSM & EDGE
TCXO
F F
X100
DSA321SCE-19.2M
R110
4 1
VREG_TCXO_2.85V VCC VCONT
100ohm
3 2
C137 C138
C136 OUTPUT GND
0.01u 0.01u
0.1u
8 5
NC4 NC1
7 6
NC3 NC2
G G
C139 C140
R114
TCXO_PM 1000p
100K
1000p
C143 C144
RTR6275_TCXO
1000p 0.01u
U102
TC7SH04FS
H H
1 1 2 2
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4 4 5 5 6 6
L100
6.8nH
DCS
L101 L102
18nH 5.6nH
L103
6.8nH
C114 L104
DNI
5.6nH
PCS L105 L106
22nH 4.7nH
L107
5.6nH
L109
18nH
C117
GSM L110
1p
47nH
L111
18nH
2.2K R105
+VPWR
C132
C133
C134 C127 68p
56p 100p 22u
tcc_16085h_9_r
L113
1.5nH 2
DCS_PCS_IN
L114
8.2nH 16 7
DCS_PCS_OUT U101 GSM_IN
FL101
SKY77329
9 1
GSM_OUT TX_EN EFCH897MTDB1
3
R109
BS
0
3 2
G2 G1
C135 IN
O1 G3 1
4 5
82p
L115
NA
GSM_PA_BAND GSM_PA_EN
C141 C142
1000p 1000p
BLUE TOOTH
TRK_LO_ADJ
C155 1000p
9
BT_CLK
3
2
VREG_BT_2.85V
10
C163 C164
1u 1u
14
TCXO_BT
VREG_MSMP_2.7V
C174 C175
100p 0.1u
C176
2.2u
smd_1608h_9_r
4 4 5 5 6 6
- 127 -
7 7 8 9
55 2
NC1 GND2
1
GND1
46
NC2
C103 6p 44 51
DCS_PCS_TX DA_HB_OUT TX_IP
50
TX_IN
C104 5p
43 53
GSM_TX DA_LB_OUT TX_QP
42 52
NC3 TX_QN
24 7
TX_ON RF_ON TCXO
C106
56 5
NC4 V_TUNE1
18
NC6
54 C107
DAC_REF DAC_REF
12
RX_IP
U100
14 13
C110 SSBDT_RTR SBDT RX_IN
(1%)
12p R100 12K RTR6235
3 10
R_BIAS1 RX_QP
27 11
R_BIAS2 RX_QN
R101 680
(1%)
40
GND6
C113 22p 31 21
GCELL_INP NC7
30
GCELL_INN
4
VDDA1
32 6
EGSM_INP VDDA2
33 8
EGSM_INN VDDA3
9
VDDA4
38 15
DCS_INP VDDA5
39 16
DCS_INN VDDA6
19
VDDA7
36 20
GPCS_INP VDDA8
37 28
GPCS_INN VDDA9
41
VDDA10
22 45
GND3 VDDA11
23 47
GND4 VDDA12
48
C169 VDDA13
26 49
AC_GND1 VDDA14
22p
57
C150
22p
Close to GND
VREG_MSMP_2.7V
GSM_PA_RAMP
C128 C129 C130
0.01u 22p 100p
R106
DCS_PCS_TX
68
R107 R108
10 dB
91 91
R111
GSM_TX
51
R112 R113
120 8 dB 120
FM RADIO
OUT100
C148 NC1
FEED NC2
DNI
C151
2.2nH
L118
NA
FM_ANT
16
ANT
4
CLK_REF SBST BT_SBST
11
M100 SBCK BT_SBCK
12
VCC_OUT SBDT BT_SBDT
LBRQ-2B43A
5
VDD_INT SYNC_DET_TX_EN BT_TX_RX_N
R115 0
13
VDD_MSM RX_BB_TX_BB BT_DATA FM_BUSEN
7 C165 1000p
VDD_BAT XTAL_IN TCXO_BT
FM_I2C_SCL
FM_I2C_SDA
20 19 18 17 15 8 6 1
SLEEP_CLK
VREG_BT_2.85V
C177
100p
7 7 8 8 9
10 10 11 11 12 12
A A
TX_IP
C101
82p
TX_IM
TX_QP
C105
82p
TX_QM
RTR6275_TCXO
3300p
DNI Close to GND
RX_IP
RX_IM B B
RX_QP
RX_QM
C115 C116
0.1u 0.1u
VREG_RF_SMPS
C120 C121 C122 C118
C119 0.1u 33p 22u
22p
0.1u tcc_16085h_9_r C C
VREG_SYNTH_2.6V
C124
C125 C123
100p
22p 1u
R104
C145
10
22p
VREG_RF_SMPS
C131 C126
100p 10u
smd_1608h_9_r D D
E E
F F
VREG_MSMP_2.7V
FM_CONTROL
C152 C153
1u 10n
21 20 19 18 17 16
C154 100p
1 15
NC1 GND3
2 U103 14
FMIP LOUT
FM_AUDIO_L
3 13
RFGND ROUT FM_AUDIO_R
SI4702-C19-GM
4 12
GND1 GND2
5 11
_RST VD
G G
6 7 8 9 10
VREG_MSMP_2.7V
TP100
C166
0.1u
TP101
TP102
H H
10 0 11 11 12 12
LGE Internal Use Only