Technics QUARTZ SA-R177 User Manual

@ SCHEMATIC DIAGRAM
(Parts list on pages 35 ~ 40)
(This schematic diagram may be modified at any time with the
development of new technology.)
Note 1:
e $601-1, S601-2 : Speaker selectors.
$601-1: A S601-2: B
S701 : Power “on/off” switch.
@$702 : Voltage selector switch. (For (G) area.)
$901 ~ $910 : Preset-tuning (1-0) switches.
$901 : CH1, S902 : CH2, S903 : CH3,
$904 : CH4, S905 : CH5, S906 : CHG,
$907 : CH7, S908 : CH8, S909 : CH9,
$910 : CHO
es911 : Music-scan/group-search switch.
@$912 : FM mode selector.
@ $913, $914 : Band selectors. "
$913: FM, S914:AM
@ $915, $916 : Tuning switches.
$915: W(DOWN), S916: A (UP)
S917 : Memory switch.
S918 : Loudness switch.
eS919 ~ $926 : Group registration switches.
$919 : start, S920: rock, $921 : jazz
$922 : classic, S923 : easy, S924 : news
$925 : other, S926: end
e@$927~S929, _ : Input selector switches.
$931 $927 : phono, $928 : tuner, S929 : oo,|
ee :VCR1
© S930 : Tape-monitor/VCR 2 switch.
® Signal line
coon : FM OSC <=>: FM signal
==B8) - AM OSC em AM signal
cz : Phono signal : AF signal (Lch)
—(__}- : 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 boltage 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 LSI with the fingers directly.
Note2:
¢ Use of ceramic filters in pairs
The ceramic filters (CF 201, 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.
Color marking
(Blue, Red or
Note: © mark: Diode is used.
x mark: Diode is not used.
a47
SA-R177 SA-R177
1 2 3 4
e Remote-control transmitter (EUR64747)
B48
Chottering
simuhaneous|
push inhibit
=lo Lg
thee
S
x.
©
fz 2)
Key input contro! circuit
Pulse
generation
circu
Pa
ei eid bie
He be
ELL |
ao
(Z)
we,
Ea
1
» x
cA ceAes
(2)
)
Timing generation circuit
(o)
O-®
aa
cl
M50467-O18FP
(4) CONTROLLER
¢ Remote control data code
Head Custom Inversion Inversion
Data code Custom code Data code
pulse code
a,
*Data “0” «Data "1"
UL El a
08 01100 | ovotoo | aw [Turere | ovoov | ovorns |
foeckecmute | ore0r | ooornn | av [umes | ovo01__| 010000
«[oecKniay« | o1oon | ooroor [ae [coe | _o11o0 | _ovsou0 |
Pveunew | _or0o1 | [ex [coe | 01100 | or0001
Pruners | or001 |
Lo100 |
[eps | oto [ae —[oecx pause] —oraor [0110 |
Trogariconinue | 01100 [stare | — oreo] oro
11 [oop | ott00 |_ 30 [tuner2 | otoo1 | oro001
foecxnays [01001 [ao [ooo | oreo —or1001 |
Fvaunedom | —owor—tooror | 1 Jone} ~on1oo | oro010 |
[DECK stop | oro01__|__ 000000
47 Tuner3 010010
feos | ort00 | oro0nr
ee
:
[ocx ve [oreo | cootoo
[inere [ooo] —oroorr
° 8
forint |
[copa | 1100]
fossa | oor |
21 [wing | voor |
Pruner? | 01001]
for ——*d onto _|
27 _[odsep ‘| __on00
3/8 8 o|o = ae 8
:
ieee
3
8
3v
ai
Y
Teed
2SC3265Y
@) LED DRIVE
Error Check
~
\35 ms
tear TERY
— 18 —
FM ANT.
(75)
GND EY
AM ANT @
AM LOOP
ANT.
EY tuner(Fm/am) circuit
Gno Y
Loch cd ©
r— REC ouT ©
VCR |
LpLayBack ©
r- REC ouT G
TAPE/VCR2
tpLavsack ©
Rech co ©
r REC OUT ©
VCR |
Uptayeack ©
r- REC out ©
TAPE/VCR2
UpLaysack ©
TNIOI(FM FRONT END PACK) RALOOO6M
2SK544
FM RF AMP
2SCI675LIL2
FM OSC/BUFFER
AM ANT coil AM OSC coil
c417 100P
ann
SS eee eee C225 R233
18P 680K
Q2i0
2SCI740SQSTA
AM OSC BUFFER
t
875MH2-~IO8MHz
Vv (aM) U
~
Bx:
Q101,102 vk BS
2SC2785FETA ge
FM/AM LooP FILTER VU,
5 30kH2 =~ 1600kH?
C463 R457 457 C459
6.3V33 270 022 0.0068
C461
Se? 253.3
R461 R463
180K i
* C458 C460
0022 00068
R421 3.3K |
WN
1c401 Essent
TC9I63N
INPUT
SELECTOR
R417 100K
WW
R418 100K
INPUT SELECTOR CIRCUIT

Technics QUARTZ SA-R177 Specifications

General

Brand	Technics
Model	QUARTZ SA-R177
Category	Stereo Receiver
Language	English