Sony HMK-70 - Page 12

SECTION 4
DIAGRAMS
4-1. SCHEMATIC DIAGRAM — Fm (A-m) Front-End Section —
Q001 2SK23A
FM RF AMP
ROOS § FM
CNJ7 FM ANT COIL 13.5v 220 RF COLL
LOO! cTOO! cvoo2 L003
eB coo
uson! | | og BP" 00
ee ed (1
cnuig [BALON Ny,
e cvoo!
FM 750: a om
‘a
/
/
/
co Si
7 IS351M
i ROOG 1.5k AFC
7 ROO4
/ ROOT 4.7k
/
/
/
/ Ton
{447
| 16V
| colo
| 0.022
|
Col2 0p 0.7
| ROO!
| 2.7k
|
|
|
CNJ8 AM
A EXT
ANT
L
$2
MW-=—= LW
C007
0.022
C005
0.01
ROI3
100!
kK
Q002 28C710
FM MIX
a
Roog ROIO 56
15k \4.0v
120
47/25V
Q106
2SCE634A
A-M AGC
(re )
SELECTOR,
S$2-7
AER Cco6l
tal 3 10p
C062
150p
C060
i: 20p
C058
20p
C059
300p
CT052 087
6p
13
HMK-70 HMK-70
oN
aio! 2SC710 ai02 2SC710 o109ISI555 oo 1SI555 103 2SC710 0104 2SC710 0102 IT22A 0103 IT22A
FM LE AMP FM EF AMP LIMITER LIMITER FM/A-M I-F AMP FM/A-M I-F AMP FM DET FM DET
a
WN
R356
Ci
0.0229 Ci25
10
RR
0.022" RI54 470k ee
asv CNEIO
FM(B@)
To preamp/tone
IAM OUT [ control boord, CNJIO
AM(B@)
MODE
L-CH OUT
To preamp/tone,
E contol ‘board, CNUS
R-CH OUT
COM(B@)
IC BLOCK DIAGRAM
1c201 CX-043!
051 2SC710 MPX CECODER H
A-M OSC |_| R20
L201 CR201 LOW-PASS FILTER
q ar eo SRE
52-5 $26 S2- bes eke TaN CIRCUS 25V 6000
, a Loe A 680 PL? e)
R201
STEREO
RO52 LAMP Cy
“L051 1.5K
15.0V
2 LBV,
— | Os
ee 3 1 coe9 16
p = :
Sle
201
Viev 10V
(12,0V) 76
ROSS 46V
BOSE tgsvy 7 9.6K
r |
R202k = N.OVey OV
R2034 (2.1V)
2.2k igk=
é cos?
068] 4.
COG6 6.022| 25V c202
: 0.47
50V
cR202
| LOW-PASS FILTER
Ref. No. Description Position Note: All resistance values are in ohms. k=1,000, M=1,000k.
Sl A-M ANT BUILT-IN All capacitance values are in uF except as indicated with p,
$2 BAND SELECTOR LW which means uF.
All voltages are dc measured with a VOM which has an input
impedance of 20k ohms/volt. No signal in.
Voltage variations may be noted because of normal pro-
duction tolerances.
Capacitors marked 4 are built in transformers.
( ) ; A-m operation
< >; STEREO operation
mmm °°°"° B + line
LCH RCH
ouTPUT OUTPUT
202
‘Muz0T
To MODE SW
Detailed IC (CX-0431) diagram