Technics QUARTZ SA-160 - Schematic Diagrams

SA-160
Mi SCHEMATIC DIAGRAM
(This schematic diagram may be modified at any time with
the development of new technology)
Note 1:
°$1~S10 : Preset tuning switches.
$1: 1, $2: 2, S3: 3, $4: 4, S5: 5, |
ea 6, S7: 7, $8: 8, S9: 9, S10: 0
°Si1 : Memory-scan/group-search switch.
© $12 : FM mode select switch. (AUTO++MONO)
° $13, $14 : Band selectors.
$13: FM, S14: AM
¢
S16,
S17
:
Character-input/tuning
switches.
$16: down, S17: up
° $18 : Change-mode selector.
© $19 : Assort-mode selector.
¢ $20 : Group select switch.
° $21 : Memory switch.
¢ $22 : Loudness switch.
¢ $23~S27 : Input selector switches.
bios phono, S24: tuner, S25: CD, |
$26: VCR1, S27: tape/VCR2
¢ $601-1, S601-2 : Speaker selectors.
$601-1: main, S601-2: remote
e¢ $701 : Power switch in ‘‘on” position.
® Signal line
ema : B.P.F. signal <——>» : FM signal
coon
:
FM
OSC
aaa
©
AM
signal
auaap : AM OSC : AF signal (Lch)
crzzzrfp : Phono signal
—< >— : Positive voltage lines
--< >-- : Negative voltage lines
¢ Important safety notice:
Components identified by A mark have special
characteristics important for safety. When replacing any of
these components, use only manufacturer's specified
parts. Indicated voltage values are standard values for the
unit measured by the DC electronic circuit tester (high-
impedance) with the chassis taken as standard. Therefore,
there may exist some errors in the voltage values, depending
on internal impedance of the DC circuit tester.
¢ All voltage values shown in circuitry are DC voltage in FM
signal (Stereo signal) reception mode.
* Figures in ( ) Stand for DC-voltage in AM signal reception
mode
* Caution!
IC and LSI are sensitive to static electricity.
Secondary trouble can be prevented by taking care during
repair.
* Cover the parts boxes made of plastics with alminum foil.
* Ground the soldering iron.
* Put a conductive mat on the work table.
* Do not touch the legs of IC or LS! with the fingers directly.
Note2:
° Use of ceramic filters in pairs
The ceramic filters (CF201, CF202) for FM-IF circuit are
available in three ranks. For this circuit, be sure to use the
ceramics of the same rank in a pair.
At repairing and replacement, pay close attention to the
diodes (D914, D915) for use as different diodes must be used
depending on each rank of the ceramic filters.
CENTER
FREQUENCY
se 10.65 MHz
10.70 MHz
ox
x 10.75MHz
Note: © mark: Diode is used.
x mark: Diode is not used.
->—
‘For (XL) area.
[em ANT
(759)
For
FM ANT
AM ANT.
-AM |
LOOP ANT
GND
tLech
PHONO
Rech
[Lch] cD
[-REC OUT
VCRI
UPLAYBACK
r-REC OUT
TAPE/VCR 2
PLAY BACK
[Ra] 60
[-REC OUT
VCRI
LPLAYBACK
[REC OUT
TAPE/VCR2
“PLAYBACK
(EX,EH) areas.
YQ)
%
| 2 aap
as a
1) (759)
seg iP
ae a : re ©)
YQ
(Oj
Y
i
Cc
OF
SA-160 SA-160
3 4 6
For (EX ; EH, XL) areas. For XEN XL) areas. ----- 820K
For (EG) areo. 470K
TNIO! (FM FRONT-END PACK) SNVFE203E01
ee a eae ee Ak had lh en re a a ee a (c20l
__FM
signal
+
$c2668
|
AN7273A
2SK439 - Cece ! - FM/AM IF AMP,
— rene —t-) | ae C) Bi Sc? DET® AM MIXER,
l 7 f S | & Cees | 28¢2787
sie, i | FM IF AMP
jicior 2 ;
6 “Y2-~LM7001 Jpb—--—----——==
1
1
1
:
PLL
FREQUENCY
H SYNTHESIZER
1
114.6V
(Cv)
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b
2s
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L
For others.
Tpas7 |
l
peo | i CL DATA Syc- Bor
---@--@)-----@------
180K ~680K| 0.02
7K
2SC609
FM OSC
signal!
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FM AM
Pd2 PD! Voo2 Vool
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: 2SA564A
25C8785 23V aN POWER SUPPLY ( FM/MW/LW)
2
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FILTER -530kH2 =—=1620kH2
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6V33 270 0.022 0.0068
Phono signal
BUFFER AMP CIRCUIT
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MUTING CONT. MUTING
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C407 Q505
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TC9IG3N
IN PUT
SELECTOR
Se
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mi
INPUT SELECTOR CIRCUIT