EFJohnson 764X - Manual (Page 88)

SECTION 8 - SCHEMATIC DIAGRAMS AND COMPONENT LAYOUTS
5V
5V
8
7
6
5
4
3
2
1
BAL
REF
T4
T3
T2
T1
AF
DTCS
IC5
SCK
SO
PLST
UNLK
5V
x1 or x2
NWC
R5
L26.L27
2nd Lo
PLL
IC REF
OSC
BAL REF
FM DET
IC3
NOIS
SD
FI3.FI4
or FI5
NWC
CERAMIC
BPF
BPF
x3
DISC
IC2
LOOP
FIL
VCO
5V
5V
C60.C61 Q7.Q8
D7.D8
L14
Q10
Q5
RIPPLE
FIL
BUFF
BUFF
BUFF
Q4 Q6
5V
TX/RX
SW
D5.D6
L23.L24
T5 T5
Q3 Q2 Q1 IC1
BUFF BUFF
PWR
AMP
VCC
LPF
L5
FWD
REV
RF
DET APC
CTRL
VCC
IC6C
Q17.18
T4
D1.D2
LPF ANT
SW
D3.D4
D13.D14
L17.L18
T5
L1.L2.L3
BPF BPF BPF
BPF
RF
AMP
5V
Q35
RF ATT
L19.D16
T1 T2
Q12
T3 T4
L22
D20.D21 L21
D18.D19 R5
L20.D17
ATT
R5
Q13
O L t S 1
FI1 or FI2
IF
AMP
Q14
R5
XTAL
BPF
MICIN
MICOUT IC4b
MMUT
AMP
IC7d
5V
HPF
5V
AFHPF
IC8
5V
IC7b
E
N
O
T
E
N
O
T
X
E
S
C
T
D
DET
AF OUT
IC4a
AMUT
AMP
IC7a
5V
MIC
5V
IC7c
BUFF LIMIT
AMP
5V
NWC
IC6b
T5
AMUT
5V
IC6d
AFON
MOD
IC4d
IC4c
BUFF
HV
AF
AMP
IC10
AFO
J5
J5
FAN
EX.SP
J4
SP
HV
PTT
IN
DET
AFO
HORN
DIM
HV
J3
DIM
SW
HORN
SW
SIG
SW
Q34
Q32
Q33
HV
DIMIN
HORNO
AFO
DET
IN
EXPTT
+5
REG
T5
SW
R5
SW
8V
REG HV
SW
Q26
PWON
Q36
Q27
R5C
Q28
T5C
Q29.Q30
PWON
IC9
8V
HV
R5
T5
5V
CPU5
W7
+5
REG
MIC
TEMP
VIN
PLST
DAST
EXST
EXEN
UNLK
NOIS
RFATT
DTCS
BEEP
TONE
BEEPOUT
BUSY
OPCS
OPINT
GND
CPU5V
8V
GND
LVIN
SD
SCK
SO
DIMIN
EXPTT
PWON
DET
PTTIN
PTT
OPV1
OPV2
OPV3
OPT1
OPT2
OPT3
SI
AFO
5V
J1
to FRONT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
GND
5V
HV
MICMUTE
AFONOP
BEEPOUT
RXMUT
DET
AFOUT
REM
OPCS
OPINT
SO
SI
SCK
MICOUT
MICIN
BUSY
MOWN
SIGOUT
OPT1
OPT2
OPT3
OPV3
OPV2
OPV1
J2
OPT
X
X
EXTONE
IN
PTTOUT
PTTIN
MMUT
CTRL
RMUT
CTRL
5V
SO
SCK
EXST
EXEN
NWC
AFHPF
AFATT
HORNO
TMUT
T5C
MMUT
RMUT
IC11
M
M R
M
D25
D26
EXP
CPU
VIN
TEMP
LVIN
SO
DIMIN
EXPTT
PTTIN
UNLK
NOIS
RFATT
PWON
EXEN
EXST
DAST
PLST
SCK
SO
SI
BUSY
OPCS
OPINT
OPV1
OPV2
OPV3
OPT1
OPT2
OPT3
HANGER
MIC
PTT
AFO
CLONE
8V
MIC
CLONE
I/F
Q4
J1
LPF
D/A
5V
Q6
R33.R34.R35
Q5
5V
BEEP
MUTE
Q10
AMP
DET
DTCSIN
TONE
BEEPOUT
5V
R60
5V
Q7
BEEP
5V
AF CH U/D.Etc
KEY X8
SW2-SW9
POSW
S1
DIM
CTRL BACK
LIGHT
Q3.D6 DS2-DS11
DS1
LCD
POSW
KS0.KS1
KR0-KR3
DIM
SEG1-SEG32
COM1-COM3
CPU5 CPU5
RESET EEPROM SHIFT
CTRL
X1
D5,C17 IC3 IC2.Q1
CPU5
MIC
TEMP
VIN
PLST
DAST
EXST
EXEN
UNLK
NOIS
RFATT
DTCSIN
BEEP
TONE
BEEPOUT
BUSY
OPCS
OPINT
GND
CPU5V
8V
GND
LVIN
SO
SCK
SO
DIMIN
EXPTT
PWON
DET
PTTIN
PTT
OPV1
OPV2
OPV3
OPT1
OPT2
OPT3
SI
AFO
5V
to MAIN
FRONT UNIT
MAIN UNIT
IC1
LPF
A/D
COMMON LINE
LINE
RX LINE
TX LINE
DATA BUS LINE
BEEP
DRIVE
AMP
BPF
CSHIFT
RESET
ECS
SI SO
SCK
OSC2 OSC1
CTCIN CLIN CLOUT HANG BM MTONE DTMF CTDAO-CTDA2
J2
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
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39 40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
VCC
GND
NC
NC
8-1
November 1998
Part No. 001-7600-001
VHF (7610) BLOCK DIAGRAM