Technics RSTR 474 M 2 Service Manual

Page 1

ORDER NO. A09809165A2

Service Manual

Dolby NR-Equipped Cassette Deck

Stereo Double Cassette Deck R S_T R 47 4 M 2

*
Du DOLBY B-c NR HX PRO 00'0"!

(K) .................... Black Type
Areas
E ..... Europe.

EB ..
EG ..

Great Britain.
...Germany and Italy.

=6 Dolby noise reduction and HX Pro headroom extension
manuiactured under license lrorn Dolby Laboratories
Licensing Corporation. HX Pro originated by Bang and
Olufsen. DOLEY, the double-D symbol and HX PRO
are trademarks of Dolby Laboratories Licensing

Corporation
AR-1 MECHANISM SERIES
Please file and use this manual together with the service manual for Model No. RS-TR474, Order No. ADQ401007C5
and the supplement service manual for Model No. RS-TR474, Order No. A0951025155.

Notes: 0 This simplified service manual is provided to indicate the main differences between the original model No.
RS-TR474 and the subsequent model No. RS-TR474M2.
0 Refer to Schematic Diagram, Block Diagram, Printed Circuit Board Diagram, Wiring Connection Diagram, and
Replacement Parts List (Electrical, Grease cf Jig Tool) of this service manual.
0 Reterto original Service Manual for Accessories, Connections, Caution for AC Main Lead, Front Panel Controls,

Playback, Recording, About the ATC Function, Self-Diagnostic. And with regard to another items, refer to
Supplement Service Manual.

CHANGES

I Specifications [Cover page of RS-TR474 Original Service Manual.]

RS-TR474 RS-TR474M2

I General I General

Weight 4.4 kg Weight 4.2 kg

A WARNING
This service information is designed lor experienced repair technicians only and is not designed for use by the general public. It
does not contain warnings or cautions to advise nonvtechnical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians, Any attempt to
service or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.

© 1998 Matsushita Electric Industrial 00., Ltd.

0
® All rights reserved. Unauthorized copying and
ec nlcs distribution is a violation of law.

Contents

Page 2

RS-TR474M2

I Writing to EEPROM (Page 14 at RS-TR474 Supplement Service Manual.)

o EEPROM MAP
Low 9 o 1 2 3 4 5 6 7
o oo - A0 A0 - - - -
oo -- A0 50 - - - -
2 - - A2 43 - - - _
a 5A - - 4D - - - -
4 - - - 50 - 5A 60 so
5 - - - 53 - 74 8c 6A
a - - - - - 18 28 28
7 - - - - - 71 71 76
8 - - - - - as AC 53
9 - - 9o 90 90 4D 5A 53
A - - so 06 - 4c 53 48
B - - 5A 20 - 20 so 30
c - - 55 1o - 94 92 94
o - - 78 06 - 93 9A 80
E - - 50 F3 - 7o 7o 08
F - - 53 F5 - 58 53 oo

Note: At an address with no data value indicated (eg. 01 -> -), the ROM operates normally

irrespective of the kind of the data supplied.

I Measurements and Adjustments (Page 17 of RS-TR474 Supplement Service Manual.)

PLAVBACK FREQUENCY RESPONSE (DECK 1/2)

mu: 1(3on 20on

I

5mm \ka 2kHz 4kHz

cum-r2

Fig. 4

r5dB

.363
was

4:13
(NB

CONFIRMATION OF THE OVERALL GAIN AND
OVERALL FREQUENCY RESPONSE

Normal overall frequency response chart (NR OUT)

«we
was
oadB
+2.15

oda
-2dB
«as
as

50H: 10on 200942

+AdE

ode

-4dB

50on (Hz 2km mm:

Fig. 5

Cr02/Metal overall frequency response chart (NFl OUT)

+243

5qu man: 20on

+5dB

-5dB

500": (Hz ZkHz 12.5kHz

Fig. 6