PRESIDENT HENRY classic ASC 12/24, Service Manual

Page: 18 / 42

ASC AGC
27MHz 10.695MHz 455kHz
10.24MHz
EXT SP
10.24MHz
37.66MHz
～
38.1MHz INTERNAL
SP
16
Ω
5W
FRONT MIC
6
5
4 RX AUDIO
3
26.965MHz
～
27.405MHz 26.965MHz
～
27.405MHz
2
ANT
1 MIC
MAXMOD
POWER SUPPLY
EN
MCU IC404
D551 LED MODULE
CH SW
Q204
TX BUFFER
Q203
PRE DRV
Q404,Q405
DIGIT DRV
IC406
RESET
IC6
SQ AMP
Q5
2nd Mixer
Q6
IF AMP
1st
Q420,Q423
PWR
REGU
IC301
PLL
IC7
ASC
NOISE AMP
T401
AM MOD
TRANS
Q406
CLK BUFFER
FT1
MCF
D1,D2
RF ATT
Q1
RF AMP
BPF
Q2,Q3
1st Mixer
Q303
VCO
SHIFT
Q202
DRV
Q11
ASC
GATE
Q401
AF MUTE
LPF
D12
AGC DET
D11
AM DET
Q10
SUM AMP
D13
ASC
NOISE DET
IC5
FM DET
IC6
AGC AMP
Q8
IF AMP
2nd
FT2
Ceramic
Filter
X301
REF OSC
FREQ
CONT
Q426
TX POWER
ADJ.
IC406
SP AMP
Q9
AM MUTE
Q19
FM MUTE
D8
ANL
FINAL
MATCH
Q502
FINAL
Q302
VCO
BUFF
IC403
EEPROM
IC402
2.5V REF
Q421,Q424
TX 8V
REGU
Q402
AM MOD
MUTE
Q409,Q412
COMP DET
& DC AMP
Q415
AMC DET
Q301
VCO
IC491
12V DC/DC
Q416,418,422
8V REGU
Q417,419
5V REGU
CONFIG
MATRIX
Q304
FM MOD
MUTE
IC401
LPF
IC401
MIC AMP
Q407
MIC MUT
LPF
ASC
AMMUT
FMMUT
VOLUME
SCK
DAT
LE
SRF
SQ
SQ
CONT
AGC
VT8
LD
MAX MOD
AM FM PWR ADJ
MIC SW
MIC
BIAS
FIN
12V
8V
5V
FMMUT
AMMUT
XIN
CP
12V
12V
T
O
N
E
PLL DAT
L
D
UK
OFFSET
UK
S
Q
S
R
F
C
O
N
F
IG
F
M
M
U
T
M
IC
S
W
T
B
R
M
U
T
T
X
P
C
U
K
P
L
L
C
L
K
P
L
L
D
A
T
P
L
L
L
E
A B C D E G
A
N
I
A
N
I
C
H
U
P
S
Q
V
O
L
A
N
I
M
U
L
T
I
E
E
P
D
A
T
E
E
P
C
L
K
R
S
T
N
TONE
C
H
D
N
A
S
C
A
N
I
MIC MUT
AMC
M
IC
M
U
T
X
IN
BLOCK DIAGRAM
HENRYCLASSIC 12/24V(UT405ZV)
RMUT
XTAL
OFFSET
EXTCLK
EXTCLK
SQ VOL
SQVOL
VT8
VT8
8V VT8
S
F
T
SFT
T
B
A
M
M
U
T
TXPC
RFG
PWR SW
RFgain VOL
SP GND
SP GND
AM MOD
FM
AM
F
OFF
OFF CH19
F
D
P
S
1
S
2
S
3
S
4
T
L
E
D
C
O
M
1
C
O
M
2