Motorola TIMEPORT 280, Service Manual

Page: 59 / 64

P280 - SIGNAL FLOW - PAGE 1/2
A
B
C
D
E
F
M2
SPKRP
J
L
M
Q
B1
AUXMICN
N
U900
GCAP III
J901
EXT Conn.
J900
SIM Conn.
Y
9
0
0
3
2
,7
6
8
M
h
z
C
ry
s
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U700
PATRIOT
U701
Flash/EEPROM
U350
TX VCO
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9
1
2
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a
tt
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ry
C
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n
n
.
U550
DCS/PCS IPA
U500
GSM IPA
U10
Antenna Switch
A10
Ant. Conn.
J100
Ext. Ant. Conn.
U400
PAC IC
FL104
400MHz
IF Filter
U100
FRONTEND IC
AL900
ALERT Pads
M810
VIBRATOR
BTI
RTC Battery
U300
RX VCO IC
FL100
2nd DCS/PCS
Filter
1 5
6
8
9
13
14
16
12
1 5
6
10
11 15
16
20
7
8
9
12 14
17
20
1
5
10
11 15
16
9
8
7
2 4
6
1
4
5
6
8
9 12
13
16
1
6
7
12
13
18
19
24
3
4
16
SH100
SH200
SH300
SH301
SH700
SH900
GSM_EXC_EN N_GSM_EXC_EN DCS_SEL N_GSM_SEL DM_CS SF_OUT N_RVCO B+ EXT_BATT BATT+ B+ WATCHDOG VREF V1 5V V3 VSIM1 V_BOOST
SW_VCC DCS_SW GSM_EXC_SW N_DCS_SW N_GSM_EXC_SW PA_B+ GSM_EXC_EN N_GSM_EXC_EN N_DCS_SEL N_GSM_SEL PA_B+ GSM_EXC_EN SF_OUT N_TXVCO V2
N1
SPKRM
K
D12
SC1B
SRDB
SCOB_PC2
B10
A10
BFSR
BDR
BCLKR
G H
I
BCLKX
BDX
O
P
B9
SCKB
STDB
C10
1
4
5 8
9
12
13
16
2
6
7
14
R
GCAP_13MHz
C6
CLK_IN
C7
A7
A6
FQ32kHz
XTAL1
XTAL2
GCAP_CLK
A2
F14
L3
CKIL
CKOH_SCC_CLK
CKIH
22 23
5
2
10
14
3
13
2 3
11 10
from MagicDM
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IF
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A
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+
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-
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3
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C
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1
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1
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1
2
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1
3
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4
1
4
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T
5
1
5
A
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D
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T
1
6
A
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D
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_
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1
7
G
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D
1
8
G
N
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1
9
G
N
D
2
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G
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D
L
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_
S
IM
_
C
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K
L
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IM
_
R
S
T
V
S
IM
1
S
I
M
_
IO
V
S
IM
1
G
N
D
THERM
BATT_SER_D
BATT+
GND
fr
o
m
P
a
tr
io
t