Service manual

Table Of Contents
7-56 Schematics, Component Location Diagrams, and Parts Lists: ASTRO Spectra Plus VOCON Section
July 1, 2002 68P81076C25-C
ASTRO Spectra Plus Voltage Conversion Schematic
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I
I
I
O
O
O
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O
I
O
ENCRYPTION 5V TO/FROM SECURE
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I
I
O
O
O
I
I
I
VOCON TO COMMAND
O
O
O
O
I
O
I
I
I
TO CONNECTOR
O
O
I
COMMAND TO VOCON
O
O
O
I
O
O
I
I
I
O
O
O
I
I
O
O
O
I
O
O
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I
FROM CONNECTOR
I
ENCRYPTION 3V FROM/TO PATRIOT
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I
O
O
I
O
O
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I
0.1uF
VCC5.0
VCC5.0
C500
C502
0.1uF
VCC3.0
Y7
0.1uF
C504
VCC
18
Y0
16
Y1
14
Y2
12
Y3
9
Y4
7
Y5
5
Y6
3
A3
11
A4
13
A5
15
A6
17
A7
1
EN_OE1
19
EN_OE2
10
GND
20
Y7
MC74LCX244
U503
2
A0
4
A1
6
A2
8
VCC
18
Y0
16
Y1
14
Y2
12
Y3
9
Y4
7
Y5
5
Y6
3
A3
11
A4
13
A5
15
A6
17
A7
1
EN_OE1
19
EN_OE2
10
GND
20
MC74VHCT244A
U500
2
A0
4
A1
6
A2
8
2K
9
Y5
7
Y6
5
Y7
3
VCC3.0
R500
1
19
EN_OE2
GND
10
VCC
20
Y0
18
Y1
16
Y2
14
Y3
12
Y4
2
4
A1
A2
6
A3
8
A4
11
A5
13
A6
15
A7
17
EN_OE1
9
Y5
7
Y6
5
Y7
3
U502
MC74VHCT244A
A0
1
EN_OE2
19
GND
10
VCC
20
Y0
18
Y1
16
Y2
14
Y3
12
Y4
2
A1
4
A2
6
A3
8
A4
11
A5
13
A6
15
A7
17
EN_OE1
U501
MC74VHCT244A
A0
VCC5.0
0.1uF
C501
VCC3.0
14
Y2
12
Y3
9
Y4
7
Y5
5
Y6
3
Y7
15
A6
17
A7
1
EN_OE1
19
EN_OE2
10
GND
20
VCC
18
Y0
16
Y1
2
A0
4
A1
6
A2
8
A3
11
A4
13
A5
MC74LCX244
U504
MISO_SEC_5
MOSI_SEC_3
SS#_5
MOSI_SEC_5
SSI_SEC_CLK_5V
RESET_OUT_5
VIPOUT2_5
VIPOUT1-BL_EN_5
SS#_3
SSI_SEC_CLK_3V
RESET_OUT_3
VIPOUT2_3
VIPOUT1-BL_EN_3
LH_RESETO_3
C503
0.1uF
INT_PTT_3
TX-RS232_5
LH-TX_DATA_5
QSCKA_5
SYN_SEL_5
LH_RESETO_5
DISP_EN-LATCH*_5
TXPA_EN*_5
K9_4EN-MIC_EN_5
LOCK_DET_5
LH-RX_DATA_5
BUSY_RTS_5
RTS-RS232_5
RX-RS232_5
LH_RESETI_5
VIP_IN1_5
VIP_IN2_5
LH_RESETI_3
EMER_5
INT_PTT_5
MISO_SEC_3
LH-RX_DATA_3
BUSY_OUT_3
TX-RS232_3
LH-TX_DATA_3
QSCKA_3
MOSIA_3
ROSC-PSC_EN_3
CTS-RS232_3
SYN_SEL_3
DA_SEL*_3
DISP_EN-LATCH_3
SPKR_EN_3
VIP_IN2_3
TXPA_EN*_3
K9_4EN-MIC_EN_3
5V_EN*_3
RX-RS232_3
RTS-RS232_3
BUSY_RTS_3
LOCK_DET_3
VIP_IN1_3
CTS-RS232_5
BUSY_OUT_5
MOSIA_5
ROSC-PSC_EN_5
DA_SEL*_5
SPKR_EN_5
5V_EN*_5
EMER_3