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C. GSM RF Transceiver IN/OUT Signal Check
➁
MODA
MODB
MODC
MODD
DCS/PCS Tx
➃
(R414)
MODA
(R410)
MODB
(R411)
MODC
(R424)
MODD
(R423)
R410
100
R411
100
R424
100
R423
100
➁
4. TROUBLE SHOOTING
GSM Tx
(R418)
N404
N403
GSM Tx
(L406)
DCS/PCS Tx
(L405)
R418
0
R419
NA
C429
33p
➃
L404
75
BLM15BB750SN1J
R414
18
R415
R416
270
270
L403
C425
22p
- 171 -
➂
N404
LDB21897M15C
4
B2
1
UB
3
B1
L406
33nH
R417
0
➂
N403
LDB211G8020C
4
B2
1
UB
3
B1
L405
22nH
C428
12p
K2
NC5
K3
MODA
K4
MODB
K5
MODC
K6
MODD
K7
N405
VCCPLL
K8
LZT-108-5325
XOOB
K9
XOOC
K10
NC6
H3
GNDBUF
H4
NC3
H5
PS
H6
GNDPLL
H7
XOOLA
A1
RFHD
A2
RFHC
A3
GNDRF
A4
RFLB
A5
RFLA
A6
VCCRF
A7
QRB
A8
QRA
A9
IRB
A10
IRA
C4
REON
C5
CLK
C6
DATA
C7
STROBE
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