Technics RSHD 550 Service Manual

Page 1

AD0101017C25

Service Manual

Service Schematics

This publication consists of schematics for product
Identified In the schematics. it Is not intended as a
substitute for a service manual. which is available from
MATSUSHITA In CD or print format. For proper repair
instructions it is neccessary to consult the CD or print
version of the full service manual.

Cassette Deck

RS-HDS5O

AR1 Mechanism Series

Colour

(N)... Gold Type
Area

(E) ........... Europe.

Because of unique interconnecting cables, when a component
requires service. send or bring in the entire system.

Specifications

Audio section

Treck system:

Frequency response (Dolby NR a"):
TVPE l (NORMAL):

4 track. 2 channel STEREO

30 Hz - 16 kHz (DIN)
TYPE ll (HIGH); 30 Hz - 16 kHz (DIN)
TYPE 1v (METAL): 30 Hz - 16 kHz (DIN)

SIN (Signal level=mex recording level. TYPE ll):

NR oft; 56 dB (A weighted)
Dolby B NH: 64 dB (A weighted)
Motor

Capsten drive: DC servo motor

System SC -HD550
Tuner ST-HDSSO
Amplifier SE»HDSSO
CD Player SL-HDSSO

EgaliDeck RS-HDSSO
Speakers SB-HDSSO

': Made in Spain.

General

Dimensions (WxHxD): 210x104 8x241 mm
Mass: 1 6 kg
Notes: Specifications are subject to change Without notice.

Mass and dimenSIons are approximate,

Manulactured under license trom Dolby Laboratories.
'Dolby' and the doubleaD symbol are trademarks ol Dolby
Laboratories.

Reel table drive: DC motor
Fast forward and rewind times (C-GO): Approx. 90 seconds
Wow and flutter: 0.1% (WRMS)
A WARNING

This servrce inlormation is destgned for experienced repair technicians only and is not desrgned lor use by the general public.

it does not contain warnings or cautions to advrse non-technical indivrduals of potential dangers In attempting to servtce a product.
Products powered by electricrty should be servrced or repaired only by experienced professional technicians. Any attempt to servrce
or repair the product or products dealt with in this service information by anyone else could result in serious Injury or death

Technics

D 2001 Matsushtta Electric Industrial Co.. Ltd. All
rights reserved. Unauthorized copying and
distribution is a Violation of law.

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CONTENTS

Page
1 Schematic Diagram Not ..................................................... 2

1 Schematic Diagram Notes

- This schematic diagram may be modified at any time
with the development of new technology.

Notes:
8803: Cassette holder open detect switch
$804: Cassette holder close detect switch
5900: Stop switch( I )
$901: Rewind switch ( « )
5902: Reverse side playback switch ( < )
5903: Forward side playback switch ( > )
$904: Fast iorward switch( » )
5905: Record pause switch
( O REC PAUSE)
S906: Cassette tray open/close switch
( A OPEN/CLOSE)
5907: Reverse mode select switch
(REV MODE)
$908: Dolby noise reduction switch
(DOLBY NR)
8909: Counter switch (COUNTER)
$910: Counter reset switch (RESET)
$911: Tape Program Sensor switch
(TPS SKIP)
5971: Mode detect switch
5972: Hail detect switch
5973: ATS/Cr02 detect switch
5974: Reverse record inhibit switch
3975: Forward record inhibit switch
5976: ATS/METAL detect switch
VR102: Playback gain adjustment VR (R ch)
VR103: Playback gain adjustment VR (L ch)
VRBOS: Tape speed adjustment VR

- Indicated voltage values are the standard values tor the unit

measured by the DC electronic circuit tester (high-
impedance) with the chassis taken as standard. Thereiore.
there may exist some errors in the voltage values.
depending on the intemal impedance oi the DC circuit
tester.

No mark : Playback
( ) : Recording
' important salety notice:
Components identified by A mark have special
characteristics important for saiety.

Furthermore, special parts which have purposes at lire-
retardant (resistors), high-quality sound (capacitors). low-
noise (resistors). etc. are used.

When replacing any ol components. be sure to use only
manufacturer's specified parts shown in the parts list.

~The supply part number is described alone In the
replacement pans list.

~ Caution!
IC and LS! are sensitive to static electricity.

Page
2 Schematic Diagram ----------------------------------------------------------------- 3

Secondary trouble can be prevented by taking care during

repair.

Cover the pans boxes made at plastics with aluminum foil.

Ground the soldering iron.

Put a conductive mat on the work table.

Do not touch the legs oi IC or LSI with the lingers directly.
~ Voltage and signal line

* : Positive voltage line
: Playback signal line
::> : Recording signal line