Figure 7-40. Hud4022A Sb9600 Schematic - Motorola ASTRO XTL 1500 Detailed Service Manual

7-48
VCC5
R0620
100
BUS- BUS-*
R0621
100
BUS+ BUS+*
BUSY
BUSY
R0636
10K
LH_RESET*
LH_RESET
R0639
10K

Figure 7-40. HUD4022A SB9600 Schematic

June 15, 2005
R0626
100K
VCC2.85
R0627
R0629
U0602
10K 100K
MC33202
2 8
1 5
C0616
3
4
100pF
4
R0625
10K
R0628
100K
VCC5
Q0612
R0630
10K
100K 10K
10K
10K
Q0610
10K
10K
10K
10K
U0610
MC74VHC1G00
1
2
VCC5 VCC5
Q0613
R0622
Q0611
100
10K
10K
10K
10K
10K
10K 10K
10K
BUSY*
R0623
100
U0602
10 MC74LCX125
8
9
VCC2.85
U0603
MC74LCX125
5 6
4
R0638
10K
SB96_RS232*_EN
2
1
R0634
C0600 U0602 U0603
3 100K
0.1uF MC74LCX125 MC74LCX125
U0604
MC74LCX125
6
4
2
U0607 1
SB96_RS232*_EN_INV NC7ST08
U0609
MC74VHC1G00
1
4
2
SB96_RS232*_EN_INV
U0602
13
MC74LCX125
4
12 11
LHRST_OUT
LHRST_IN
Schematics, Component Location Diagrams, and Parts Lists: HUD4022A (VHF) Main Board
VCC5
SB96_RS232*_EN_INV
R0624
100
16
C0606
VCC
0.1uF
15
EN_OE
1
SELECT U0606
SN74CBT3257
2
I0A
3 4
I1A YA BUS+_UARTB_TXD
5
I0B
6 7
I1B YB BUS-_UARTB_RXD
11
I0C
9
10
I1C YC BUSY_UARTB_RTS
14
I0D
12
13
I1D YD RESET_UARTB_CTS
GND
8
Connector IF
R0635
1 2
100K
3
4 VCC2.85
R0631 0
C0610
VCC5 0.1uF
R0632 NP
0
2
1
U0608
NC7ST08
URXD2
C0611
UTXD2
0.1uF
URTS2
UCTS2
Patriot UART B
VCC5
U0610
PWR_GND
5
VCC
C0604 C0603
GND
0.1uF
0.1uF
3
NAND SUPPLY NAND SUPPLY
VCC2.85 VCC2.85
U0602
PWR_GND
14 14
VCC VCC
C0614 C0613
GND GND
0.1uF
0.1uF
7 7
BUFFER SUPPLY BUFFER SUPPLY
73D02970C73-O
SHEET 18 OF 23
U0607
5 PWR_GND
VCC
GND
3
BUFFER SUPPLY
U0608
PWR_GND
5
VCC
GND
3
BUFFER SUPPLY
VCC2.85
U0609
5 PWR_GND
VCC
GND
3
U0603
PWR_GND
6815854H01-A