Vhf/uhf front unit schematic, Front unit – EFJohnson 764X User Manual
Page 98
8-11
November 1998
Part No. 001-7600-001
LIGHT ON :7.5V
LIGHT OFF:5.5V
5.0V
5.0V
4.9V
3.9V
1.7V
5.0V
7.6V
5.0V
MEASUREMENT CONDITIONS
DIGITAL MULTIMETER:50k
Ω
/VDC
OSCILLOSCOPE :20MHz
3.2V
2.3V
1.4V
6.8MHz
4.2V
2.3V
0.4V
DTCS
0.7V
CTCSS
2.35V
4.0V
0mV
-70mV
70mV
27.5mV
BEEP IS SET
-27.5mV
0mV
3.3V
0.5V
1.9V
TX:5.0V
RX:0.2V
5.0V
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
VCC
PDO/SEG41
PD1/SEG42
PD2/SEG43
PD3/SEG44
PD4/SEG45
PD5/SEG46
PD6/SEG47
PD7/SEG48
PE0/SEG49/M
PE1/SEG50/D0
PE2/SEG51/CL2
PE3/SEG52/CL1
AVCC
TONEM
TONED
VTREF
AVREF
PB7/AN7
PB6/AN6
PB5/AN5
PB4/AN4
PB3/AN3
PB2/AN2
PB1/AN1
PB0/AN0
AVSS
TEST
X2
X1
VSS
OSC1
OSC2
RES
NMI
P20/IRQ4/AOTRG
P21/SCK1
P22/SI1
P23/SO1
P24/SCK3
P25/RXD
P26/TXD
P27/IRQ0
P17/IRQ3/TMIF
P16/IRQ2
P15/IRQ1
P14
P13/TMIG
P12/TMOFH
P11/TMOFL
P10/TMOW
VSS
V3
V2
V1
VCC
PA3/COM4
PA2/COM3
PA1/COM2
PA0/COM1
P50/WKP0/SEG1
P51/WKP1/SEG2
P52/WKP2/SEG3
P53/WKP3/SEG4
P54/WKP4/SEG5
P55/WKP5/SEG6
P56/WKP6/SEG7
P57/WKP7/SEG8
P60/SEG9
P61/SEG10
P62/SEG11
P63/SEG12
P64/SEG13
P65/SEG14
P66/SEG15
P67/SEG16
P70/SEG17
P71/SEG18
P72/SEG19
P73/SEG20
P74/SEG21
P75/SEG22
P76/SEG23
P77/SEG24
P80/SEG25
P81/SEG26
P82/SEG27
P83/SEG28
P84/SEG29
P85/SEG30
P86/SEG31
P87/SEG32
P90/SEG33
P91/SEG34
P92/SEG35
P93/SEG36
P94/SEG37
P95/SEG38
P96/SEG39
P97/SEG40
IC1
HD6433875A63H
SEG20
SEG19
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
HANG
CTDA2
CTDA1
CTDA0
BM
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
R47
EXB-V8V
(1kX4)
R53 1k
R52 1k
R51 1k
C11
0.001
C10
0.01
C9
10
C8
0.01
C7
0.01
C6
0.01
C5
0.01
C4
0.01
C3
0.01
C2
0.01
C1
0.01
VSS
VDD
OUT
NC
NC
3 2 1
4
5
IC2
S-80742SL-A6
R2
100k
R1
10k
C14
0.47
D1
MA111
R3
220k
R4
100k
Q1
2SC4081
C15
0.001
C16
0.001
R5
12k
R6
12k
D5
MA77
C17
0.001
C18
47p
C19
5p
X1
CR-590
L3
47µ
C20
20p
R7
1M
R8
10
R43
12k
R44
EXB-V8V
(1kx4)
R45
EXB-V8V
(1kx4)
W1
CS
SO
WP
VSS
VCC
HOLD
SCK
SI
IC3
25LC160T-I/SN
C21
0.01
1
2
3
4
5
6
7
8
R61 100k
SCK
SI
SO
CLIN
CLOUT
POSW
R64 1k
R63 1k
R62 1k
R55
100k
KR0
KR1
KR2
KR3
KS0
KS1
DIM
R67
100k
R66
100k
R65
100k
R54 1k
R48
EXB-V8V
(1kx4)
R46
EXB-V8V
(1kx4)
MTONE
DTMF
OPV3
OPV2
OPV1
CTCIN
SD
LVIN
TEMP
VIN
KR0
KR1
KR2
KR3
R17
EXB-V8V
(1kx4)
KS0
KS1
R19
470
R18
470
R59
1k
C28 0.001
S6
C22
47p
C23
47p
C24
47p
C25
47p
C26
47p
C27
47p
DIM
D6
MA8051
Q3
DTA143ZU
R11
820
1
R16
2.2k
R15
2.2k
R14
390
R12
390
DS10
DS11
DS2
DS3
DS4
DS6
DS7
DS5
DS8
DS9
8V
CLONE
AFO
PTT
MICE
MIC
GND
HANGER
R57
15k
CLOUT
CLIN
R69 100k
Q4
DTC144TU
D2
DA204U
D3
DA204U
D4
DA204U
R58
47k
2
CLON
AFO
PTTIN
MIC
HANG
R20 1k
L1 1µ
R21
1k
R22
10
C35
0.001
C34
47p
C32
0.001
C33
0.001
C29
0.001
C30
470p
CTCIN
to
MIC
C36
0.01
R25
56k
R28
1k
1
2
3
4
Q5
XP4601
5
6
R27
39k
C37
10
R24
180k
R26
3.9k
R29
1k
C38
0.022
R30
10k
C39
0.1
R31
10k
DET
CTDA0
CTDA1
CTDA2
R35
10k
R34
27k
R33
68k
R32
22k
R36
12k
C42
0.1
R37
12k
C40
0.047
C41
0.033
C43
0.01
R38
47k
Q6
2SC4081
C44
0.01
R56
5.6k
R39
100k
R40
100k
R42
330k
R41
270k
DTCSIN
C45
0.01
TONE
Q7
2SC4081
C82
0.1
R50
100k
R68
47k
R60
RV-150
(10KB)
Q10
DTC144TU
J2
C62 47p
C61 47p
C60 47p
C59 47p
C58 47p
C57 47p
C56 47p
C52 47p
R70 47k
C50 47p
C49 47p
C48 47p
C47 47p
C46 47p
C69
0.001
C67
0.001
W2
C13
0.001
C12
0.01
C63 47p
C64 47p
C65 47p
C66 47p
C70 47p
C71 47p
C73 47p
C74 47p
C77 47p
C78 47p
C79 47p
C80 47p
OPINT
OPCS
BUSY
BEEPOUT
TONE
BEEP
DICSIN
RFATT
NOIS
UNLK
EXEN
EXST
DAST
PLST
VIN
TEMP
MIC
CPU5V
8V
AFO
SI
OPT3
OPT2
OPT1
OPV3
OPV2
OPV1
PTT
PTTIN
DET
PWON
EXPTT
DIMIN
SO
SCK
SD
LVIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
DS1
LD-HU10140J
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
COM0
COM1
COM2
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
COM1
COM2
COM3
FRONT UNIT
J1
POSW
DS2 ~ DS11
SML-311YTx10
BM
5V
to
MAIN UNIT
J1
CONNECT
WITH W3
EXEN
EXST
DAST
PLST
DIMIN
EXPTT
PWON
UNLK
COM1
COM2
COM3
RFATT
PTT
OPT1
OPT2
OPT3
OPCS
BUSY
OPINT
NOIS
R49
100
CSHIFT
5V
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
BEEPOUT
BEEP
5V
DTMF
MTONE
AFO
MIC
HANG
PTTIN
HANG
PWR
S1
P0
S2
S3
S4
∆
S5
∆
∆
∆
S9
P3
S8
P2
S7
P1
VHF/UHF FRONT UNIT SCHEMATIC