Technics RSTR 373 M 2 Service Manual

Page 1

ORDER NO. A09809166A3

- Service Manual

Dolby NR-Equipped
Stereo Double Cassette Deck

ud-

Cassette Deck

RS-TR373M2

Colour

(K) .................... Black Type

Areas

E ....................... Europe.

EB .. ............ Great Britain.

EG .. Germany and ltaly.

GC .. ...Asia, Latin America, Middle

Near East and Africa.
GN .................... Oceania.

Dolby noise reduction and HX Pro headroom extension
manufactured under license from Dolby Laboratories
Licensing Corporation. HX Pro originated by Bang and
Olulsen. DOLBY, the double-D symbol and "HX PRO
are trademarks of Dolby Laboratories Licensing

AR-1 MECHANISM SERIES Corporation.
Please file and use this manual together with the service manual for Model No. RS-TR474, Order No. AD9401007CS
and the supplement service manual for Model No. Fts-TR474, Order No. AD951025135.

, Notes: 0 This simplified service manual is provided to indicate the main differences between the original model No.
FiS-TFt474 and the subsequent model No. FtS-TR373M2.
0 Refer to Schematic Diagram, Block Diagtam, Printed Circuit Board Diagram, Wiring Connection Diagram, and
Replacement Parts List (Electrical, Grease or Jig Tool) of this service manual.
0 Refer to original Service Manual for Accessories, Connections, Caution forAC Mains Lead, Front Panel Controls,
Playback, Recording, About the AT0 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-TR373M2
I Cassette Deck Section I cassette Deck Section
Fast forward and Approx. 50 seconds # Fast forward and Approx. 95 seconds
rewind times with 060 cassette tape rewind times with 0-60 cassette tape
Headphones 30mv (80) I General
[RS-TR474 only] (Load impedance 8-6009) Power supply AC 110V/127V/220V/
I General For ((36) area 230-240V, 50/60Hz
Weight 4.4kg Weight 4.2kg

A WARNING
This service Information Is designed for experienced repair technicians only and is not designed for use by the general public. It
does not contain warnings or cautions to advise non-technical 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.

Technics

© 1998 Matsushita Electric industrial Co., Ltd.
All rights reserved. Unauthorized copying and
distribution is a violation of law.

Contents

Page 2

RS-TR373M2

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

o EEPROM MAP

Low i9 0 1 2 3 4 5 6 7
o oo - A0 A0 - _ _ _
1 oo - Ao so - _ _ _
2 - - A2 48 - - _ -
3 5A - - 4D -- - - _
4 - - - 50 - 5A so so
5 - - - 53 - 74 3c 6A
6 - - - - - 1s 23 23
7 - - - - - 71 71 75
s - - - - - BB Ac 133
9 - - 90 9o 90 4D 5A 53
A - - so 05 - 4c 53 43
B - - 5A 20 - 20 60 so
0 - - 55 1o - 94 92 94
D - - 73 06 - 93 9A so
E - - so FB - 70 7o 08
F - - 513 F5 - 58 55 oo

Note: At an address with no data value indicated (6.9. 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.)

PLAYBACK FREQUENCY RESPONSE (DECK 1/2) CONFIRMATION OF THE OVERALL GAIN AND
OVERALL FREQUENCY RESPONSE

+6415
.412 515 Normal overall frequency response chart (NR OUT)
03MB
13$ me
4605
0G
I +443
M 48 9363
31B 38 +2dB
4G
1 ' oars
6G 68
' ~ZdB
63-h IOOHZ ZOGHZ SUCH! 1kHz 2kHz 4kHz 126k": 'MB
31554: em; MB

Fig. 4

sol-12 10on 200Hz 50on tka 2m: MHz

Fig. 5

CrOflMetal overall lrequency response chart (NR OUT)

5on1 ioaHz 20011: 50on lkl-tx 2m: 12.5w:

Fig. 6