Technics QUARTZ ST-K50

ST-K50
m@ BLOCK DIAGRAM
FM ANT
ZI01
FM FRONT END PACK CF201
Poe ee re Se ee 71
| RF amp |
-
ist A
\
|
; | FM OSC
1 |
L-p-— Ga eos 4
6 3 J4 5
C8) aio1
(FM) 2102 eae
FM/AM
Loop filter
Z201
FF Fog ote eat 5 ee 7
AM ANT ty be iat
Hel atk ett
AM Signal : 1
a LM700I
(7.2MHz)
a PLL FREQUENCY
SYNTHESIZER
a207~ 209 Paes ey =
(aM) @) EMA pxouT XIN PDI FM IN ie
Power
Supply
"
BOI
AM
INO
Selector
(FM) GB) Vool Voo2 Vss CE CL DATA
AM OSC Coil
ppt eel sag
CF202
Q201,202
FM
1F omp
Z202
. !
FM/AM Muting
Ta get: ght
FM MONO DISTORTION adj.
TP20ol TP202
0
T20!,
202
ANT273W
tit
‘era
FM
Bt)
f1c309)
+
:
CO)
EM/AM
IF
AMP.
DET
FM
MPX
este
8
9
16
ji?
}i2
14
eas
oe
te
sa
teh
ge
ee
eee
-
ote
5
r
a
=
rns
!
FM
V
|
|
|
am osc |
— cE
DgI5 40
—Bt— PAO
OPAI
soil sgl2
KEY MATRIX
s909 S910 7
e) (9) 0
9 (0)
sgis |
MODE) |
-16-
Voltage
regulator
Stereo/
mono
selector
Forcible 16
mono/
VCO stop
9kHz<
(9kHz<
aa OFF.
5 6
+ + Q303
iE J Muting
(AM) ha a en <a a a es ae ee re See ce ee i ieee control
4
VR301I TP30!I O 7
‘le ie MPX,VCO adj. MPX VCO adj. KR
B)t1)
D204
(AM) GB) p
PB3 MONO
LC6512A3997
MICROCOMPUTER
FL9OI
DISPLAY
ST-K50
OUTPUT
Q709
riers aes |
AC OUTLET
(SWITCHED)
|
|
|
|
|
|
|
|
|
|
|
|
J
S701
(POWER)
Q706,707
E OaI0! T70l
Qasio (t)
| | Power ON Q7ol D701,702
| Supply
| Regulator
| +
|
L
reas. Q702
(GC,PX)areas. |,
(REMOTE
SENSOR) Regulator
0928
D710,711
ON
Remote D929
control + REMOTE
drive CONTROL STANDBY
(To AMP)
-17-
a - =
| “> °<FM signal
|
ovg>
>
FM
OSC
|}
(GC,PX)areas.
{
mm
©
AM
signal
|
| a> :AMosc !
iL-—-~— = =