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4-10.
'SW TEL ANT
swis
swig
SCHEMATIC
DIAGRAM
FM1 FRONT END (P1)
ou 2sk23
903; 2SC403A
C06
220
IFT O1
Q303 2SC633A
isW2-19 AGC CONT
Q301 2SK23
SW2-19 RF AMP |
i
1304
VSWEI~13,
ANT COIL
R303
47k
ANT COM
301
J
L324~L341
a:
(ee
SW2~19
FRONT
END
(P7)
HK RO22
Ska
Note:
1. +r
shows grounding to chassis.
2. All resistors and capacitors
are in Q
and uF, unless
otherwise indicated.
Capacitor marked A is built in if transformer.
The
symbol # indicates a component
whose value is
selected to yield specified operating condition.
Voltage value is measured to ground circuit with a dc
voltmeter (20 k®/V) and current value is measured with
a dc ammeter.
Voltage and current are taken with no
radio signal received.
Variations may be noted due to
normal production tolerances.
— AZ —
CRF-230B
CRF-230B
C:
Fa
102
ANT
Bit / | ANTCon2 /| Cos
,
7
ey
ee
DIO! _1T240
RiO7
cla
clos
5p
6p,
/
/
ese
ee
HT 305
Q305 25C403B
SW2-I9 Ist OSC BUFF
HT304]]
0306 25C403B
=
SUE fet MIE
oi3al
307 25¢403B
L32i
Rag
0022
'SW2-19 2nd MIX
47OyH
R318
R38
a
aes
R326
22k
y
cists
Re
200
1 [| IFT301
ip
IFT 302
ie
cigs
aay
9304
K)
0.25V.
33k
19
Q304 2SC668
SW2-19 Ist OSC
3/95
100
hoolp
R309
C399
R310
i
68k
Sv.
2nd Osci' Sip
ae LL "
)a305
dev
0396 | ary
3p
Q308 2SC403B
SW2-19 2nd OSC
/
Q20! 2SC7I10
Q202
2SC7I0
203
2SC7I0
Q204 2SC710
Q205 2SCTIO
0202 ,203 IT261
D204,205
1T243
az
FM IF AMP 2
FM
IF AMP
3
FM
IF AMP 4
FM IF AMP 5
FM
IF AMP 6&
FM
DET
QIOl 2SK23
QI03 2SC403A
os
oo
FM2 MIX
FM2 IF AMP
Ri
ger
if
R221
R222
aba
R228
C106
R202
R207
w
_
a
ee
220
7k L CIS
R230
R236 24k
22p IFT 101
2aKn33K|
R205
30k
D201.
Fetaor = 33k
1ET20;
720
1FT203,4__
0202 Ik
0103
sioi-2
820 T |cooe
aavp*
R218
2
Ae
30vF
Jar | 38v"
E
1
:
d_craoi
re
aay
»
F203
_R2I7
22
ce
!
brit aes
aav XK)
af it
Oy
R209
ik
201
R
8301
8
ke
R220
50
C209
Lgl
:
;
0
i
D201_1T243
Q209 2SA678
R251 560
Q2I0 25C633A
R237 180k
ae
0206 IT262
FEED BACK SWITCHING
tee TGFERENTIAL
ct
—_
rioa]
clo 5p
C238
peu
D
10k
:
J
1750
o2i9
Fs
92,
R201
eae
CH
iM
5k
R238 aey 0206
a
Lav.
280
ved
!
Sik
R250 56k
o2i2
vegol
6226
y
LY)
(PD tov
47K
601
R2a7 coan—Hea39
loz 2sc4o3a_
VF
gy)
L201
Sik 0901
/50v
IMS CURVE PHASE 22!
R25
168E
3
REVER
0212.213, 214, 215,
aa3z 200
20208 ITe62 D209 i262
ee
——
is:
5
Q206
2SC633A
Q207 2SC633A
Q208 2S5C633A
x
'CARRIER CONT
NOISE AMP
FEED BACK SWITCHING
6
8
*
oct eae
soa
9gg1 ascaosa, |
oa
A
R404 470
Lw/MW/SWI_RF
= aa
wien
$401-6
RAI0
+
2.2k
igs
R408
402-6
3
IS710-1
$710-2
S20I-3
S401 >
A
ie aise?
©
3402-5
$403-6
0022
(Kv) 34
8"
|
(a
| F8 t
on
"SS
Lae
%
o2v.
5405
R409
af
R709 100k
R403
4
10k
= Cait
(3)
c4o3.
«C405
Mn
406
Sra0e
c407.
2 soar
claog
Riaz | 0022
0.033,
7
0068
joa?
Ie
=
Ss ae
[|
= 13.
=
ZL
Z
402 28c4038
> |
vi
LW/MW/SWI MIX
|
ee,
|
Q403 2SC668
Lw/MwW/SWI
OSC
t
CP CIRCUIT BOARD (P5)
a
Q6O! 2SC633A
602
2SCE33A
na
ae ee
ee
ee
ee
i
a
C7 a
AF
AMP |
AF AMP 2
15
6. Switch Position
Switch
Function
$101
FM 1/FM 2 select
$201
FM/AM
select
$202
AFC
$203
MUTING
$401
Band Selector (SW1)
$402
Band Selector (MW)
$403
Band Selector (LW)
S404
Band Selector (SW2—19)
$501
SELECTIVITY
(BROAD/SHARP)
$502
ANL
$503
MGC
Position
FM2
FM
ON
ON
OFF
OFF
OFF
ON
BROAD
OFF
OFF
Switch
$701
$702
S703
S704 —
S709
$710
S801
S901
$902
Function
POWER
ext power/battery
LIGHT
LIGHT
BATTERY
CHECK
BFO
SENSITIVITY
(LOCAL/DX)
ROD ANT/EXT ANT
Position
OFF
ext power
(built in connector)
OFF
(ON with ac power source)
built in band selector
ON
ON
DX
ROD ANT
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