- 110 -
LGMC
VC2
(4.3nH)
9
PCS_Rx
MFG ENGR CHK:
L
LG Electronics
1.0
5
L
L
H
L
H
L
L
H
Changed by:
Time Changed:
L
POWER AMP
PGSM_Rx
GSM1800
GSM1900
11
2
B
Drawing Number:
A
G
DCS/PCS_Tx
EGSM_Rx
QA CHK:
G
11
9
3
REV:
10
PGSM/EGSM_Tx
F
(INFINEON)
8
DCS_Rx
8
F
C
7
D
TRANSCEIVER
7
GSM900
VC1
Engineer:
Drawn by:
R&D CHK:
TITLE:
4
E
E
2
B
GSM850
5
1
L
L
10
3
1
Date Changed:
12
L
C
H
MAIN PCB_BOTTOM SIDE
4
Size:
D
6
6
Page:
(RFMD)
12
A
mentor
Tuesday, November 22, 2005
5:31:08 pm
4/4
KE770 : RF PART
A3
12 1 8 A
DOC CTRL CHK:
2V85_RF
68u
1V5_RF
L405
1nH
NA
C440
C436
C445
100p
1
SW401
KMS-518
A
C
G1
G2
2V7_VCXO
SC1
0.1uF
C429
4.3nH
L406
22p
2V85_RF
1u
C409
C496
0
R414
C426
2.7p
0
R409
C401
1V5_CORE
VDDTX1V5
VDDTX2V8
38
17
VDDVCO2V8
15
VDDXO2V8
11
XO
XOX
12
NA
RX2X
24
RX3
RX3X
25
22
RX4
RX4X
23
TX1
36
37
TX2
VBIAS
34
18
VCO_RC
VDDBIAS2V8
31
VDDDIG1V5
8
5
VDDDIG2V8
VDDLNA1V5
21
39
VDDMIX2V8
19
VDDRX1V5
VDDRX2V8
20
35
4
7
CLK
DA
6
EN
16
32
FE1
33
FE2
FSYS1
14
FSYS2
10
9
FSYS3
GND1
13
26
GND2
GND3
40
41
GND4
RX1
29
30
RX1X
RX2
27
28
PMB6272
U401
1
A
AX
2
3
B
BX
27p
1V5_RF
C442
0
R410
Y1
Y2
100nH
L409
NC7WV16P6X
U403
A1
A2
GND
VCC
C431
22p
GND6
GND7
17
GND8
19
GND9
21
HB_RFIN
1
18
HB_RFOUT
LB_RFIN
7
12
LB_RFOUT
10
NC1
NC2
15
20
NC3
TX_EN
3
4
VBATT
VMODE
5
6
VRAMP
U402
RF3158
2
BAND_SEL
8
GND1
22
GND10
GND11
23
9
GND2
GND3
11
GND4
13
GND5
14
16
0.1uF
C427
0.1uF
2V85_RF
C411
R417
1K
C499
100p
100p
C498
10p
C497
C407
1u
C433
0.1uF
C441
100p
2V7_VCXO
18p
C507
C406
1u
X401
26MHz
2
GND
OUT
3
4
VCC
1
VCONT
C424
2.7p
ANT
2
G1
G2
3
4
G3
0.1uF
C434
WFL-R-SMT10
CN401
L402
18nH
C423
2.7p
5.6nH
L403
C505
3p
56p
C404
NA
C500
0
R413
VSUPPLY
10
0.1uF
R404
1
GSM850_RX_OUT1
GSM850_RX_OUT2
2
3
GSM900_RX_OUT1
4
GSM900_RX_OUT2
14
VC1
VC2
13
C412
17
ANT
10
ESD
GND1
9
GND2
11
GND3
16
18
GND4
GND5
19
20
GND6
GSM1800_1900_TX
12
GSM1800_RX_OUT1
5
GSM1800_RX_OUT2
6
7
GSM1900_RX_OUT1
GSM1900_RX_OUT2
8
15
GSM850_900_TX
LSHS-M085FE
FL401
C428
47n
C425
0.01u
C435
1000p
100p
C443
NA
C437
C430
1u
C415
NA
C410
C418
2.7p
NA
NA
C413
C408
C444
100p
1u
C417
L404
4.7nH
2V85_RF
2.7p
NA
L401
2.7p
C422
1000p
C495
2V85_RF
0
R401
10
R403
820
R411
C446
1.5p
NA
C494
NA
C402
HBAND_PAM_IN
PA_LEVEL
ANT_SW1
ANT_SW2
AFC
LBAND_PAM_IN
RF_CLK
RF_DA
BT_CLK
RF_EN
26MHZ_MCLK
PA_BAND
MODE
TXON_PA
I
IX
Q
QX
LBAND_PAM_IN
HBAND_PAM_IN
7. CIRCUIT DIAGRAM
Summary of Contents for KE 770
Page 1: ...Service Manual Model KE770 Service Manual KE770 Date April 2007 Issue 1 0 ...
Page 3: ... 4 ...
Page 5: ... 6 ...
Page 49: ...3 TECHNICAL BRIEF 50 3 15 BLUETOOTH Figure 22 BLUETOOTH Functional block diagram ...
Page 57: ...3 TECHNICAL BRIEF 58 RF Block Diagram III 2 RF circuit ...
Page 76: ...Check Points 5 Trouble shooting 77 ...
Page 78: ...5 Trouble shooting 79 ...
Page 82: ...5 Trouble shooting 83 ...
Page 87: ...5 Trouble shooting 88 ...
Page 100: ... 101 6 Download S W upgrade Click on the blue text to select the COM port ...
Page 101: ...6 Download S W upgrade 102 Will change the window as below ...
Page 103: ...6 Download S W upgrade 104 During download the screen will look something like this ...
Page 105: ... 106 ...
Page 111: ... 112 8 PCB LAYOUT ...
Page 112: ... 113 8 PCB LAYOUT ...
Page 113: ... 114 8 PCB LAYOUT ...
Page 114: ... 115 8 PCB LAYOUT ...
Page 115: ... 116 8 PCB LAYOUT ...
Page 121: ...10 Stand alone Test 122 4 Click Update Info for communicating Phone and Test Program ...
Page 125: ... 126 ...
Page 143: ...Note ...
Page 144: ...Note ...