Technics RSD 225 W Service Manual
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Page 1
Service Manual
Dolby NR-Equipped
Double Cassette Deck
*
DU DOLBY SYSTEM
RS-DS50W MECHANISM SERIES
SPECIFICATIONS
Deck system Stereo cassette deck
Track system 4-traok, 2-channel
Heads
(TAPE 1) PLAV Solid Permaloy head
(TAPE 2) RECIPLAY Solid Permaloy head
(TAPE 2) Erasing Double-gap ferrite head
Motors
(TAPE 1) Capstanlreal table drive
2 speed electronically controlled DC motor
(TAPE 2) Cepstenlreel table drive
2 speed electronically controlled Dc motor
Recording system AC bias
Bias lrequancy 80kHz
Tape speed 4.8cmlsec. (1 -718ips)
Frequency response (wlo Dolby N.R.)
METAL 20Hz~16kHz
30Hz~15kHz (DIN)
Croz 20Hz~15kHz
30Hz~15kHz (DIN)
NORMAL 20 Hz~15kHz
30Hz~15kHz (DIN)
SIN (signal Ieveizmax, recording level, Cro; type tape)
Dolby NR In 66dB (CClR)
NR out 56dB (A weighted peak)
Technics
ORDER NOt HA0860446008
Cassette Deck
R S- D 2 2 SW
Color
(K)...B|ack Type
Color Areas
(K) [E].. ..All European
areas except
United Kingdom.
(K) United Kingdom.
(K) ..Holland.
(K) ..F.R. Germany.
(K) .Belgium.
(K) Asia, Oceania, Latin
America, Middle
Near East and
Africa.
(K) [XL] ........ Australia.
Wow and flutter 0.08% (WRMS)
t0.2°/a (DIN)
Fast forward and rewind time
Approx. 105 seconds with 060 cassette tape
input sensitivity and impedance
LINE 60 mV/47 k0
Output voltage and impedance
LINE 400mV/1.5k0
I 6 EN ERAL
Power consumption 18w
Dimensions (W x H X D) 430 x 115 x 227 mm
(16-15116" >< 4-112 X9-1I32")
Weight 3.4 kg (7.5 lb.)
=l< Dolby noise reduction manufactured under license from
Dolby Laboratories Licensing Corporation.
Dolby" and the double-D symbol are trade marks of Dolby
Laboratories Licensing Corporation.
Matsushita Electric Trading Co., Ltd.
PO. Box 288, Central Osaka Japan
RS~D225W
Page 2
I CONTENTS
0 How To Connect
- Location of Controls
- Operation .........................
- Disassembly Instructions.
0 Information on Power Supply Jig.
- Measurement and Adjustment Methodes
0 Microcomputer Terminal Function and
Waveform ...................................................... 11, 12
I HOW TO CONNECT
Connect the turntable, tuner, amplifier, cassette
deck, and CD player as shown.
If the connection Is wrong, normal operation will not
be attalbed.
Tuner (ST-ZQQOIZQQOL) and Cassette deck (RS-
D225W) is not equipped with power supply. So. the
amplifier shown or power supply JlG is necessary for
the repair and check of Tuner or Cassette deck.
Ground wire (option)
Turntable
(option) .
O
0 co
-' Connection cord ior remote- -'
(GND Q "4 SW WWW" control (included) Make connec-
cable (option) llon to a Technlcs turntable whlch
has remote control terminal.
Tuner
he
L_i
Contact the cable natto
J touch me run-m lop
pan-ls amt. nmpllllcr.
(GND) (FNL) ® 7-7, (Li
Stereo
amplifier SPEAKERS
CD/AUX inn/m a L LA; in fig
REC UUT PLAVEACX O O E]
© we no 9 o o
n ® gOOOm'W
emu mom) mm ? comm
iimER REMOTE
'-' (RKL) ' ' '-_
Stereo \ Flat cable
Connection cattle (D ® "ngtimme' @
c PM (included)
ISSIHI
tape deck E
-_. I-J
/\
(H) ('9 . ® .
Compact '
disc player
(option)
IE]
Lms our
->;< Fiat cables for remote-control
should be connected correctly.
if connections are wrong. the
units do not lunction correctly,
Page
0 Wiring Connection Diagram ............... 13, 14
0 Printed Circuit Boards ...... 15~17
- Resistors and Capacitors
0 Block Diagram...
- Electrical Parts Lts .
0 Schematic Diagram.
. Mechanical Parts Location
- Cabinet Parts Location .....
neconn couraOL
SIGMA L (our)
TAPE DECK CONTROL
SiGNAL (IN)
[3
GND
tch OUTPUT
Itch OUTPUT
(ND
lch IN PUT
Hen lNFUT
}flC 9.3V INPUT
[5
GND
TUNER CONTROL
SGNAL (OUT)
re
}MOT USED
ct DATA SIGNAL (m)
} ilOT IJSED
fl?
} m usen
ciDArA SIGNAL (ounj
j
I5
)ei113vaUT
)A' 113v INPUT J
~W»WMM.W .« A.