Icom IC-A20MK II Service Manual page 34

SECTION 8 BLOCK DIAGRAM
1С1004 0 35.345MHz
SOL MC3372P
voL
AF POWER AMP
Icloos
TA7368P
NOISE DET
^ NOISE
моов 155226: [4 P ow O
F
AMP
Д
LIMITER
= NS
M 4
<]
Ist IF AMP
Q2004
205
SQL CONTROL
AMP
QI008 ‫804652ו‬‎
01009 DTCI44EU
QIOIO 2SC4081
AF AMP
REGULATOR
01023 ‫804652ו‬‎
91024 258909
FRONT AGC А)
Q2005
25С408!
AF LPF
01012 2SC408!
FILTER
ANL SWITCH AM DET
V
2nd IF AMP
01002
2025
¿N
CERAMIC
AGC AMP 2nd IF AMP FILTER |
004 SELECTOR
0100 0 101008: ©1004 DTCI44TU
01001,01002
12
AF PRE AMP
Qiolt 2SC408!
21003 01001 Е11001
TC4w53F 25с4081 254215 lods
30Hz AMP FM DET LIMITER AMP VOR AMP
1C4003a 1C4002b 1С4002а 1с400 ALC
uPC358 LM6393 LM6393 NJM3403 соо!
DIOI3
VOR 30Hz BPF VORS IOKHz AMP 30Hz FILTER
VOR SENSOR
1C4003b COMPARATOR боо аро 1с4001с 1с40019 COMPARATOR
uPC356 1C4004b NJM3403 NJM3403 140050
25С4081х2
04003
RNI409
LM6393 LM6393
CURRENT AMP
IC400la
VOR UNIT
NJM3403
LCD
DS3007
FSD-8E96Z-CU
KEYBOARD
BACKLIGHT
CONTROL
Q3003
25с408!
LIGHTO
KEYBOARD INITIAL
MATRIX MATRIX
LCD BACKLIGHT
CONTROL
Q3004
2SC408!
LIGHTO
LOGIC UNIT