Service manual

November 2001
Part No. 001-7240-001
8-4
+
_
7.5 VDC
BATTERY PACK
C232
0.1
BATT
Source
L5V
D201
R220
100k
D202
Q206
UMT3904
D204
R226
10k
R227
1k
C240
33pF
D205
3.9V
R224
2.2kSW BATT
Q205B
S19953
Q205A
S19953
7.5V SUPPLY SWITCHES
+
C228
4.7
+
C234
4.7
C235
1000pF
C236
33pF
C230
0.1
Vcc
Source
R221
100k
C233
1
R223
100k
1
Out
CE
Gnd
NC
3
4
52
In
1
Out
CE
Gnd
NC
4
52
In
3
L5V REGULATOR
+5V REGULATOR
U205
R1120N501
U206
R1120N501
+
C226
4.7
+
C238
4.7
C227
0.1
C237
1
C239
0.1
+5V
Source
L5V
Source
F201
3A
D203
+
C231
10
BT100
+
C221
4.7
C222
1000pF
+5S
Source
+5S SWITCH
Q202
UMC5N
C223
1000pF
T5V
Source
T5V SWITCH
Q203
UMC5N
+
C224
1.0
C225
1000pF
R5V
Source
R5V SWITCH
Q204
UMC5N
POWER SUPPLIES
R106
100k
R107
0
C101
0.01
R108
47k
R103
100k
Q101
UMT3904
R102
56k
R101
10k
R104
10k
R105
150k
C102
470pF
R110
47k
+
U101A
TA75W01
R112
390k
C103
820pF
R5V
C105
0.039
R114
27k
C106
0.01
R117
5.6k
C47
0.01
R115
560k
R116
150k
+
U101B
TA75W01
R111
100k
R113
120k
R5V
C107
1
C108
1
R120
22k
COMPANDOR
U204
MC33111
14
Exp In
15
Exp Out
Comp In
C110
1
Out 1
6
7
Inv 1
12
4
1
Gnd
CM
EM
3
C112
1
C111
1
5
11
Exp Cap
Comp Cap
C112
1
R218
470k
10
9
2
Out 2
Inv 2
Comp Out
R129
10
R119
150k
+5S
Vdd
16
NC
13
RECEIVE AUDIO PROCESSING
300-3000 Hz
BANDPASS FILTER
Wide/Narrow
NPSPAC
Rx Audio Out
Rx Audio In
3
2
1
8
4
C104
0.1
5
6
7
R121
100k
C114
0.01
R122
100k
C115
0.01
+
U102A
LM2904
4
+5S
8
C113
0.1
R123
47k
R124
47k
R125
330k
C116
2200pF
Q103A
UMH9N
Bandwidth Control
+
U102B
LM2904
C118
3300pF
3
2
6
5
C117
0.1
1
7
BANDWIDTH CONTROL
+
U103B
LM2904
R126
100k
R127
330k
D101 D102
R128
100k
+
U103A
LM2904
+5S
8
C121
0.1
5
6
2
37
1
4
+
C120
4.7
Q103B
UMH9N
T5V
LOW-PASS FILTER
DATA
DETECTOR
RECEIVE DATA PROCESSING
DATA MUTE
Rx Data
1
U141B
74HC4053
1
2
15
Y1
Y0
Y
10
7
R141
10k
C141
6800pF
R142
10k
R143
10k
+
U142B
LM2904
C143
680pF
R144
33k
C142
0.015
4
+5S
6
5
7
8
R145
12k
R146
10k
+
U142A
LM2904
C145
3300pF
R147
22k
C144
3900pF
2
3
1
R148
10k
R149
10k
+
U143A
LM2904
C147
3300pF
R150
22k
C146
5600pF
2
3
4
+5S
8
+
U144B
LM2904
+
U144A
LM2904
D142
4
+5S
8 D141
R151
15k
C150
1
R153
33k
R152
33k
C148
1
+
U143B
LM2904
Q141
DTC144
T5V
7
5
6
4
+5S
8
5
6
7
3
2
1
Rx SN Data
LOW-PASS FILTER
Rx/Tx SMARTNET DATA PROCESSING
LOW-PASS FILTER LOW-PASS FILTER
DATA DETECTOR
DATA SELECT
R158
27k
R155
100k
R156
470k
R157
27k
+5S
R160
100k
R161
100k
C153
0.01
+
U145B
LM2904
C152
0.01
R162
47k
R163
47k
R164
330k
C156
3300pF
Q142
DTC144
C155
2200pF
+
U145A
LM2904
C157
0.1
C154
0.1
+5S
U141A
74HC4053
X1
X0
X
+5S
16
Ctrl
Vee
Ctrl
Vdd
11
R165
10k
14
13
12
4
82
3
16
5
7
U141C
74HC4053
Z0
Z1
Z
9
Ctrl
6
4
5
3
C151
1
Inhib
LOW-PASS FILTER
TEST
SWITCH
BANDWIDTH
CONTROL
DATA SELECT SWITCH
TRANSMIT DATA PROCESSING
21
1
20
18
19
9
17
3
4
223
22
24
11
14
12
6
8
7
15
10
16
DGND
GND4
GND2
GND1
A2
W2
B2 A1
W1
B1
CS
CLK
SDI
VCC
SHDN
RS
A4
W4
B4
A3
W3
B3
U147
AD8403
+5V
R186
10k
DIGITAL POTENTIOMETER
R216
1k
R215
1.8K
C207
4700pF
R213
22k
C210
6800pF
C208
6800pF
R214
270k
+
U151B
TA75W01
T5V
R167
0
C160
5600pF
+
U151A
TA75W01
R172
1M
C163
33pF
R173
1k
R174
820
R175
470k
C162
1
C161
0.1
R171
33k
R170
56k
T5V
+
U146A
TA75W01
C165
2700pF
C166
680pF
R178
3.3k
C167
0.033
+
U146B
TA75W01
C168
3900pF
C170
68pF
R168
5.6k
C164
1
R176
30k
R177
82k
R180
82k
R181
120k
C171
0.1
6
5
8
4
7
2
3
1
2
3
1
T5V
8
4
6
5
7
TRANSMIT AUDIO PROCESSING
HIGH PASS FILTER
LIMITER
LOW-PASS FILTER
R182
5.6k
R187
10k
+
U148A
LM2904
R185
47k
+5V
R183
68k
+5V
R184
56k
2
3
1
8
4
R188
0
R193
68k
T5V
R192
0
Pwr Control
Transmit Audio
Transmit Data
AMPLIFIER/COMBINER
Tx Audio/Data
C203
0.01
+5S
5
6
Osc 1
Osc 0
Tone Out
A0
178
3
4
2
Gnd
SCL SDA
Vcc
Y201
3.5795 MHz
DTMF ENCODER
U203A
TC4W66
R204
100k
R207
47k
R208
10k
Q201
DTC144
U202
TC4S66
C206
1
Rx Audio
Tones
R205
100k
C204
0.1
R203
2M
U203B
TC4W66
+5S
C205
0.01
12
4
12
4
7
6
5
3
8
86
6
15
24
_WDTOVF-FWE
PF2/_LCASI_WAIT/_BREQ0
P17/PO15/TIOCB2/TCLKD
P15/PO13/TIOCB1/TCLKC
GND6
GND15
GND24
PA4/A20/_IR04
PA6/A22/_IR06
P65/_IR01
P64/_IR00
GND38
GND47
GND59
GND79
AGND/03
GND104
P43/AN3
77
78
95
10
11
12
14
16
18
19
35
P40/AN0
R236
1M
C244
27pF
C243
27pF
Y202
9.8304 MHz
C245
3pF
Q207
UMT3904
C246
0.1
R234
4.7k
28 Clock Shift
R235
470
PC7/A7
PB0/A8
PB1/A9
PB3/A11
PB4/A12
PB6/A14
PB7/A15
PA7/A231_IR07
XTAL
EXTAL
R238
330k
C247
0.1
R237
680k
C248
0.1
Vcc
39
40
41
42
50
58
61
66
67
68
69
70
87
92
117
118
120
PE1/D1
PE4/D4
PE5/D5
PE6/D6
PE7/D7
PD6/D14
P35/SCK1
P61/I_TEND0I_CS5
P25/PO5/TIOCB4/TMI1
P24/PO4/TIOCA4/TMRI1
P23/PO3/TIOCD3/TMCI0
P22/PO2/TIOCC3/TMRI0
P21/PO1/TIOCB3
PF1/_BACK
P53/_ADTRG
PG1/_CS3
PG2/_CS2
PG4/_CS0
25
27
31
R280
0
R244
0
38
47
59
79
103
104
U210
TC4S11
72
L5V
R242
100k
55
P32/RXD0
5
2
1
3
4
Q208
UMT3904
R230
100k
R241
100k
D206115
MD2
R196
10k
1
2
8
9
Hold
NC
NC
NC
NC CS
SO
SI
SCK
13
3
4
5
10
R197
10k
6
WP
7
Vss
L5V
Vcc
14
NC
11
NC
12
16K x 8 EEPROM U150
X25138
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Battery Out
VCO Modulation
Battery Out
Wide/Narrow
TMUT
Tx Power Ctrl
RSSI
BPF Shift
Squelch
NC
Gnd
PLL Strobe
Sw Battery Out
PLL SO
Detect
PLL SK
TCXO Modulation
DPTT Out
Gnd
Syn Unlock
C175
33pF
C183
33pF
BATT
To RF Board
J1
C182
33pF
C181
33pF
C180
33pF
C178
33pF
C177
33pF
C176
33pF
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Tx In
Gnd
Tx Out
CLR/CODE
T5C
NC
AMUTE In
Beep Out
AMUTE Out
Opt B
Ext DC
Rx Out
PTT In
Rx In
PTT Out
J3
To Encryption Module
NC
NC
NC
Sw Batt
Sw Batt Out
Gnd
Vcc
C188
33pF
C186
33pF
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Sw Batt In
Gnd
DISST
SER CLOCK
DISEN
KEYR0
T5C
KEYR1
KEYR2
KEYR3
KEYS1
KEYS2
KEYS3
AMUTE
J2
To Key and Display
Board
KEYS0
BKLED
L5V Out
TxD
21
22
23
24
25
26
27
28
29
30
RESET
MIC
KEYS4
MSO
MICE
Gnd
BATT Out
Keypad Int
Audio VRIN
SW BATT
Source
L5V
RxD
BATT
C258
33pF
C257
33pF
C256
0.1
C252
0.1
C253
33pF
C254
33pF
C255
33pF
C265
33pF
C264
33pF
C263
33pF
C262
33pF
C261
33pF
C260
33pF
C270
0.1
C268
33pF
C267
33pF
C266
33pF
PC2/A2
PC3/A3
PC4/A4
PC6/A6
PC5/A5
PB2/A10
PB5/A13
PA0/A16
PA1/A17
PA2/A18
PA3/A19
P67/_CS7/_IR03
43
29
23
22
21
20
17
13
9
8
7
5
4
PDO/D8
P13/PO11ITIOCD0ITCLKB
P12/PO10ITI0CC0ITCLKA
PD1/D9
P30/TXD0
P34/SCK0
P20/PO0ITIOCA3
PF4/_HWR
PF0/_BREQ
P16/PO14/TIOCA2
PC0/A0
PC1/A1
PA5/A21/_IR05
PE0/D0
PE2/D2
PD2/D10
PD3/D11
PD5/D13
PD7/D15
P60/_DREQ0/_CS4
P62/_DREQ1
P63/_TEND1
P26/PO6/TIOCA5/TMO0
PF6/_AS
PF5/_RD
PF3/_LWR
P50/TXD2
P51/RXD2
P52/SCK2
P14/PO12/TIOCA1
P11/PO9/TIOCB0/_DACK1
P10/PO8/TIOCA0/_DACK0
PG0/_CAS
116
112
111
91
90
89
85
65
83
82
62
60
51
49
46
45
36
34
26
3
2
108
63
102
109
110
44
71
84
105
106
107
88
57
53
P47/AN7IDA1
R229
100k
L5V
3
2
1
MR
Vdd
5
4
Reset
Gnd
Gnd
R222
100k
L5V
U207
TPS3801L50
D207
5.6V
73
_RES
RESET
PE3/D3
R243
0
37
D209
D208
54
56
P31/TXD1
P33/RXD1
R252
470
R251
470
98
32
R301
0
R304
0
R306
0
+5V
Gnd
TxD
RxD
Boot1
Reset
J101
J102
J103
J104
J105
J106
R302
0
+5V
R305
0
R303
0
1
33
52
76
81
30
75
64
74
R231
100k
R263
100k
L5V
Vcc1
Vcc33
Vcc52
Vcc76
Vcc81
P66/_CS6/_IR02
P27/PO7/TIOCB5/TMO1
NMI
_STBY
R233
100k
C241
0.01
C242
0.1
P44/AN4
P45/AN5
P46/ANGIDA0
R240
113
114
100k
MD0
MD1
80
PF7
R265
100k
R261
99
100
100k
101
97
R262
22
93
94
AVCC93
VREF
P42/AN2
C250
0.1
C251
0.1
P41/AN1
PG3/_CS1
96
119
U208
H8S-2357
MICROCONTROLLER
3
1
2
3
4
5
6
7
8
9
1
0
1
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
1
0
2
0
Rx AUDIO GATE
PT
8
DTMF
GATE
MIC AUDIO
GATE
C211
1
PD4/D12
48
12
13
12
23
22
13
25
24
27
1
28
29
21
18
19
26
16
17
30
R228
100k
L5V
D213
R256
470
D211
5.6V
26
Q102
UMT3904
R118
10k
Vdd = Pin 5 (+5S)
Vss = Pin 3 (Gnd)
R212
39k
R202
0
5
3
4
2
6
1
R154
10k
C174
33pF
R225
10k
Power Hold
5, 6
4
3
1
2
7, 8
2
5
1
4
3
2
5
1
4
3
2
5
1
4
3
R257
0
R255
100k
L5V
8
21
11
1
9
15
22
5
3
2
24
14
7
25
26
27
28
29
6
20
30
4
23
10
Tx Precursor
Tx Data
Tx SN Data
Tones
NC
NC
U201
PCD3312
R267
47k
R266
47k
L5V
31
C173
1
GND3
5
VCO Modulation
TCXO Modulation
MSI
MSO
Ser Clk
LOGIC BOARD SCHEMATIC