Block Diagram - Icom IC-A210 Service Manual

(Amended page)
July 2019
SECTION 8

BLOCK DIAGRAM

IC81
RF
AGC
IC81
IF
AGC_3
IC81
AMP
IF
Q24
AGC_2
Q21
AM
DET
D29 IC32
AM/FM
ANL
SW
IC70
ANL
AM/FM
SW
MC1 IC2
E-VOL
MC2
IC3
VOX
AMP
IC
Q9
D18
RL1
SP
SP OUT
CTRL
IC15
IC17 Q4, Q5
DS1~DS10
LED
LED
DRIVE
DRIVER
CTRL
#03 Only
IC9, IC13
other Ver.
IC9, D2
D3
LIGHT BEEP
LEVEL
SENSOR
ADJ
S2
RCL
S3
MEM
S4
DUAL
S5
EC
S6
SWAP
IC10
RS232
2
A 3 DRIVER
B
1
COM
5
A 6
Q6
B
4
X1
COM
CLK
8
7
SHIFT
9.8304 MHz
2
1
3
4
5
6
7
VOLUME UNIT
2nd IF=450 kHz
FI5 IC43 IC39
IC45
CERAMIC
IF IF IF
RF RF 2ndIF
BPF
AMP
AMP SW SW IC
Q25 Q26
FI6
CERAMIC
BPF
#01, 02, 03, 05,
11, 23, 25 Only
IC38
LPF
IC9
IC14
IC13 IC22 IC8 IC8
AF MOD/AF
ALC
LPF HPF BUFF E-VOL
AMP AMP SW
IC26 IC7
T4 IC4
IMP
HP
HP
AMP
CONV
D16, D17
DET
Q58~Q60 IC6
+8
SW
REG
IC48
MM
Seri/
Para
DRIVER
SP_CTRL
ANL
IC8, IC11, IC12
A
DATA
DATA-CLK B
CLK
C
CTRL
REG_C2
BPOUT
C
IC6~IC8
B
LEVEL
A
CONV
CPU
UL
IC3
IC4
RESET
IC5 R29
TEMP
EEP
ROM SENSOR
FRONT UNIT
The underlined parts have been updated from the previous version of the addendum, or the original pages
1st IF=38.85 MHz 1st MIX
Q20 D27 FI3 D19
IC68
IF
RF XTAL RF
AMP SW BPF SW
D28 FI4 D20
Q45
RF XTAL RF
SW BPF SW
BUFF
#01, 02, 03, 05,
11, 23, 25 Only
Q41
PRE
AMP
AM/FM
AM_MOD
D36
TX/RX
SW
IC76
AUX
BUFF
Q35
BUFF
IC78 IC49
X2
D/A BCD/Deci
38.400 MHz
CONV DECODER
TCXO
IC48
Q1
GATE Q2
CTRL Q3
MAIN UNIT
Q29
R8
SW
EL
IC44
5V
REG
+16
IC42
8V
REG
LINE
FILTER
IC2 IC16
+3 +5
REG REG
8-1g
TX&RX=118.0~136.975 MHz (Ch Spacing 25 kHz)
TX&RX=118.0~136.992 MHz (Ch Spacing 8.33 kHz)
#03 Only
#03 Only
D68~D75
D60~D67
other Ver.
other Ver.
D13, D14 IC69
D10, D11 D502~D504
RF ANT
BPF BPF ATT
AMP SW
D1~D3
IC52
TUNE1
BUFF
AM/FM
AM/FM
SW
Q500 Q501 Q504 D500, D501
PRE PRE PWR
PWR
DRIVE DRIVE
AMP DET
IC500
Q505, Q506 IC500, IC502
APC APC
AMP PCON
CTRL
SEND
SW
IC501
Q502,Q503
PROTECT
#03 Only Q5, D56, D57
other Ver. Q5, D21
Q2 Q42
Q33
VCO RIPPLE
BUFF TX_VCO
SW FIL
other Ver.
IC47 Q3
Q62
PLL LOOP VCO
RX VCO
BUFF 8V
IC FIL SW
#03,23
#03 Only
Q6, D58, D59
Q53
Q38 other Ver.
Q6, D22
SW
BUFF
IC25, IC71, IC80 Q15, Q16
IC17
AF
FET
PWM
POWER
MOD DRIVER
AMP
Q30 Q32
T8
SW
SW
IC16 IC75
TRIANGLE
+16
WAVE
REG
OSC
16V
+5
Q11
POWER
+8
SW D12
REVERSE
CONNECT
PROTECT
IC5
IC31
10V REG
REG
.
ANT
LPF
PA UNIT (other Ver.)
PA-EUR UNIT (#03, 23)
LINE
FILTER
+B
1
2
Explanatory notes
RX LINE
TX LINE
COMMON LINE
Voltage Line (16 V)
Voltage Line (8V)
Voltage Line (5V)