Technics RSCH 770 E Service Manual

Page 1

ORDER NO AD960305608

Service Manual

Stereo Cassette Deck Cassette Deck

System: SC-CH77O DD DOLBY 3 NR R S _ C H 770
*1 *3 SB-CHTIO *2- *3 SB-CH770

We SB-PC10

Colour
(K) : Black
*mse-Psro' . . V 7 " 7 ~ *2-*asa-I=510 Areas
SUfiIX for Area Colour
Model No.
R$6H770 SE-CH77O Remote Control
Transmitter Europe. Asia, Latin
System: SC-CH570 (E) America, Middle East, (K)
Africa and Oceania
*2, *3 SB-CH570 *1 SB-P0570 *3- *3 SB-CH57O

SL-CHSTO

*255_p557o *255425570 *1 : Dolby noise reduction manufactured under
license from Dolby Laboratories Licensing
Corporation

Dolby and the double-D symbol are trade

marks of Dolby Laboratories Licensing

or
*3 SB-PS10

> Corporation.
RS-CH770 SE-CH570 Remote Control
Transmitter
AFl-2 MECHANISM SERIES
Specifications (IHF 78) Frequency response (Dolby NR on)
_ TYPE I (NORMAL) 20 HZ-t 6 kHZ (DIN)
I Cassette Deck 560m" TYPE II (HIGH) 20 Hz«t 6 kHz (DIN)
Deck system Stereo cassette deck TYPE IV (METAL) 20 HZ-15 kHZ (DIN)
Track system 4-track, Z-channel S/N (signal level = max recording level, TYPE H type tape)
Recording system AC bias NH 0" 56 dB (A weighted)
Bias irequency 100 kHz Dolby NR B on 66 dB (A weighted)
Erasing sysfem AC erase Input sensitivity and impedance
Heads REC (IN) 400 mV/2a kg
DECK 1 Playback head (Permalloy) X1 Output voltage and impedance
DECK 2 Recording/Playback head (Permalloy) > Erasing head (Doublegap ferritelxt - Genera|
Motors D' V H D
DECK 1. 2 Capstan drive (DC servo motor) X1 Imezswns (WX x ) 270X118'5X 269.5 mm
Tape speed 4.8 cm/sec, Weig t 3 k9
Wow and flutter 0.16% (WRMS) Notes:
Fast forward and rewind times Specifications are subject to change without notice.
Approx, 110 seconds with 0-60 cassette tape Weight and dimensions are approximate.
Tuner/sound Compact disc _ ,
System processor player AmplIlIer Cassette deck Front speakers Center speaker Surround speakers
SC-CH'ITO ST-CH77O SL-CH770 SE-CH77O *3 *3 SB-CH77O *3 *3 SB-PCl 0 *3 *3 SB-PSt O
*ZSB-PT57O
SC-CH570 ST-CH570 SL-CH570 SE-CH57O RS-CH77O *2v*SSB»CH57O *ZSB'PCSW I 55"5570
r *GSB-PT570A
SB-P0570 I SB-P810
*2 For Europe area: Made in PAES

*3 '
Ememf" Elm a Made '" ABEL © 1996 Matsushita Electric Industrial Cot, Ltd.

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

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RS-CH770
AWARNING

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 altemptlng 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,

I Contents Page

Location of Controls 2 Wiring Connection Diagram
Operation Check and Function of IC Terminals.

Main Component Replacement Procedures .. 3~12 Block Diagrarn.....
Service Mode Function of Cassette Mechanls 13, 14 Replacement Parts List
Measurements and Adjustments 15~17 Cabinet Parts Location
Schematic Diagram ........ i 18~23 Mechanism Parts Locatio
Printed Circuit Board Diagram , 24~26

Page

28, 29
. 30~34
35
.4 136.37

NOTE:

Refer to the service manual for Model No. SE-CH770 (ORDER No. AD9603055C8) or SE-CH570 (ORDER No. AD9603054CS)
for information on Accessories, Stacking the Components, Connections and Packaging.

I Location of Controls

® Deck 1 cassette holder

® Deck 1 indicator (DECK 1)

(93 Deck 1/deck 2 select button (DECK 1/2)

@ Reverse mode select button (REV MODE)

6) Deck 2 cassette holder

© Dolby noise reduction button (DOLBY NR)

® Record pause button (0 REC PAUSE)

Record pause indicator (REC PAUSE)

© Deck 2 indicator (DECK 2)

Deck 1 cassette holder open button (A OPEN)

6) Counter reset button (RESET)

® Counter display button (DISPLAY)

® Fast forward/rewind/tape program sensor buttons
(44, >>)

Playback buttons and indicators (<1, l>)

@ Stop button (El)

Tape edit buttons (TAPE EDIT, NOR, HIGH)

® Deck 2 cassette holder open button (A OPEN)