10 - 1
SECTION 10
BLOCK DIAGRAM
VCO board
MAIN UNIT
CUR
DET
PTT
PTT
CONT
MIC
R105, C133
COMMON LINE
Rx LINE
Tx LINE
MIC
AMP
IC3C
IC3b
HPF
IC4
ANALOG
SWITCH
IC3d
LPF
CTCSS
CTCSS
TONE
MM
RM
5 V
R5
S5
VCC
T5
Q18, Q19
Q21
Q20
Q22, Q40
AF
REG
Q15, Q16
AF ON
VOL IN
VOL OUT
VCC
AF
AMP
IC5
SP
VR
MIC JACK
AF OUT
SP
CLONE
CLONE IN
CLONE OUT
OPT
EXT. MIC
SP JACK
CHARGE
I. LIM
Q27, D24, D25
VCC
BATT
GND
POWER SWITCH
VR board
BUFFER
Q31, D27
5 V
PRE
ENPHA
+5
REG.
+5
CPU
R5
REG.
S5
REG.
T5
REG.
TX LED
DS4
Q25
DS2,
DS3
LCD
LIGHT
LED SW
CPU 5
IC9, IC10, Q39
[ANI]
only
X3: 4.194 MHz
Q33
Q35
Q36
RESET
DTMF
DECODER
LPF
CTDA 0-2
COM 1-4
SEG 29-52
CIN
DTMF
DTMF/BEEP
LPF
BUFFER
IC6
R5C
S5C
T5C
IC11, D15,Q23
IC8
CPU
X2: 6.8 MHz
D14
CLOCK
SHIFT
CLV
LCD
KEY
MATRIX
EEPROM
IC7
SD
NOIS
L16, L17
BPF
RF
AMP
RF
AMP
IF
AMP
L18, L19
FI1
Q14
BPF
BPF
BPF
Q13
Q12
Q29
FI2
SQL
(INSIDE)
IF DET IC
IC2
DET
BPF
L13, L25
2nd Lo 30.4 MHz
X4: 450 kHz
BUFFER
BUFFER
SHIFT
SW
BUFFER
BUFFER
BUFFER
Q34
IC1
PLL IC
REF
X1
15.2 MHz
LOOP
FILTER
R33, R34, C48
Q7, Q8
D5, D6
VCO
Q6
Q4
Q52
TX/RX
SW
D3, D4
Q3
Q2
Q1
D1, D8, D32
L1, L2, L3
PRE
DRIVE
PWR
AMP
ANT
SWITCH
IMP
MATC
LPF
ANT
IC3a
Q9, Q28, R161
APC
T4/PWR
T4/PWR
ISENS
VCC
Q17
1st IF : 30.85 MHz
VOL IN
105.15 – 143.15 MHz
