Sony HMK-70 - Page 16

HMK-70
4-5. SCHEMATIC DIAGRAM — Audio Amplifier Section —
RIPPLE FILTER
cNug 1gV
To
record
OM
(RG
camp
board,
CNP
To
fm(a-m)front
end
J_FM(R-CH)
acai
To
record
player
Zi-f
omp/MPX
ree
3
(NPUT
OUTPUT
section,
CNP4
board,
CNP9
o—
EM
(L=CH)
Ace
Lee
CNU4
MODE,
3
To fm(a-m)front end
Af amp/MPX
board, CNP10
Po r----
:
8 4S3-4-2
Q905 2SC634A 1454
RIPPLE FILTER
iw
t
OFF
R422 220k
R322 220k
BV Q30! 25C632A,
TONE AMP
C314
o33/25v ;
c3l2
47/25V VW...
0301
R3IG K)
id 39k 06V SY _ lol
R318 39k
C308 0.0082
V301
R310 22k
N
€305 0012 (anriterye) 7Y) J 86
87 pn Off JR5I9 FF
| a
| pore} jR32t
Beak
|
1C401 TA7I2Z2AP |
_
PREAMP
ro
Sok
raepy
{(rOUDNESS)
oe Fa te at eae! 4]
ois} KS) | cag |
RAI 1 ! 1033 /25v |
Bek | Wage | | Tiaeo
ge
rey
a
|
ie
410 22k |
‘ C405 0.012 I 1 Re _— H oul a
O01 x Ral
R409 180k ca Gol l a
5 ae 0.068 Rais
Q40I 2SC632A
TONE AMP
Ref. No. Description
$3 FUNCTION
$3-1 LW
83-2 MW
$3-3 FM
83-4 PHONO
$3-5 CASSETTE
84 MONITOR
SS MODE
S6 LOUDNESS
S7 HI-FILTER
S8 SPEAKER
s9 POWER
21
HMK-70
><
reson
FM
OFF
OFF
ON
OFF
OFF
SOURCE
STEREO
OFF
OFF
A
OFF
oo
Q903 2SC634A 0901 100-2
" ISIS
iy
1Q701 2SCJ632A 27V
Q901 2scil24
REGULATOR
ee
oroa eed" POWER AMP
BOARD
VER
Q702 25Ce32A | PREDRI
PARAPHASE AMP
ite
(ew)
Q7I3 2SA678
OVERLOAD PROTECTION
Q703 2SC6B
CONSTANT QURREINT
SOURCE
c70l
: RN303 | J oarsov Vee
s R702
| Sik
! R701} C702
' 680k} 1150p
I
707 2SAT06
a
oR
Vee
sey
S|
3! | | 0801 1SI585 —peoiy fa802 asceszal
a PARAPHASE AMP
3 ; R804:
| | [sol 2scez2a 6
PARAPHASE AMP ol TBO? gy Re0S
\_¥_ 100k
wr) Q Bie
c80l
403 | | oarsov ‘ise | ~% ik a0,
VW]
caos
|
Rau
8 8
01 Sik iiss aay Fee 28.9V lo(vew)
1 0208 (SP) To. ~28VqiReo7 alae d
: ee ere @8I3 2SA678
Q803 2SC634A R805 295 OVERLOAD PROTECTION
CONSTANT CURRENT 160
SOURCE
~30V Q805 2SC1124 G07. 2SAf0S 808 2586 i
i)
ee oe
CONSTANT CURRENT
SOURCE
8LOCK DIAGRAM
10301 (IC401)
Note:
All resistance values are in ohms. k = 1,000, M =1,000k
All capacitance values are in uF except as indicated
with p, which means wu
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
production tolerances.
OUTPUT
B+ voltage
B - voltage
22
~~ e pf PSS = HSS SSS Sa 4
| WHT |
F902
YEL
To
preamp/
tone
[_254T___
Reo
F901
|
control board ,CNU 4 H | |
1
- ee 3 | oe
.7yF/250V--~ 6OH2 éturntaate | | AC INPUT
CONNECTOR
32 | a |
]
1! |
mo |
Pe Rihsroner UK Model
SEs ra ie ge ee =
0902~D905 100-2 | AEP Model |
| FULL WAVE
D902 RECTIFIER |
one
REGULATOR F902 Fool |
0906 IT243 H 16 AT
Ci001 CNu2
0,022 AC INPUT
Q904 2SC634A 300V H Connector |
RIPPLE
FILTER
J
|
I
=
'
To record
amp board, CNPI2