Motorola Timeport 280 Service Manual page 59

GSM_EXC_EN N_GSM_EXC_EN DCS_SEL N_GSM_SEL
M810
BTI VIBRATOR
RTC Battery
SH100 AL900
ALERT Pads
F
12
10
7 12
6
13
13
5
14
U100 4
FL104
U400
16
3 400MHz
2 PAC IC
FRONTEND IC IF Filter
18 1
22 23
16 1
19 24
D
E
C
FL100
2nd DCS/PCS SH300
Filter
J100
Ext. Ant. Conn.
8 5
7 6
9 4
U10
Antenna Switch
2
A10
12 1
Ant. Conn.
14 16
13
A
B
SW_VCC DCS_SW GSM_EXC_SW N_DCS_SW N_GSM_EXC_SW PA_B+
from MagicDM
P280 - SIGNAL FLOW - PAGE 1/2
DM_CS SF_OUT N_RVCO B+ EXT_BATT
U701
Flash/EEPROM
U300
RX VCO IC
L
GND
9
8 THERM
M
6
BATT_SER_D
F14 CKOH_SCC_CLK
5
4
SC1B D12
BATT+
SH200 B10
SRDB
A10
SCOB_PC2
BFSR
G
1
5
6
20
7 U500
8
GSM IPA
9
17
SH301
10
16
12 13 14
13 12 11 10
9
11 15
14 8
U350
1
5 TX VCO
4 3 2
6 20
7 16 6
U550
9
DCS/PCS IPA 1 2 3 5
8
16
10
11 15
GSM_EXC_EN N_GSM_EXC_EN N_DCS_SEL N_GSM_SEL PA_B+
BATT+ B+ WATCHDOG VREF
GCAP_CLK
GCAP_13MHz
L3
CKIL
U700
P
PATRIOT
BDX
O
C10 STDB BCLKX
J900
B9
SCKB
SIM Conn.
A2
CKIH
BDR
BCLKR
H
I
SH700
R
Q
GSM_EXC_EN SF_OUT N_TXVCO
V1 5V V3 VSIM1
U900
GCAP III
A7
XTAL1
C7 FQ32kHz
C6
CLK_IN
A6
XTAL2
J K
M2
SPKRP
N1
B1 AUXMICN SPKRM
N
SH900
V2
V_BOOST
J901
EXT Conn.