Sony CRF-230B - Page 43

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