Technics RS-676US - User Manual

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TAPE

RECOh.

Technics

Service

Manual

cee,

HI-Fl

STEREO

CASSETTE

DECK

WITH

FRONT

CONTROLS

AND

DOLBY*

NOISE

REDUCTION

SYSTEM

RS-676US

MECHANISM

SERIES

MODEL

RS-676US

SPECIFICATIONS

Power

Source:

AC:

90~109,

110~125,

200~219,

Frequency Response:

Normal

tape;

20~16,000

220~250

volts,

50/60

25~14,000

(DIN)

Power

Consumption:

25W.

30~13,000

(+3

dB)

Motors:

2-motor

system

CrOz2

tape:

20~18,000

1-Electronic

speed

contro!

motor

for

25~15,000

(DIN)

capstan

drive

30~14,000

(+3

dB)

1-DC

motor

for

reel

table

drive

Signal

Noise

Ratio:

Dolby

out;

Transistors:

28C1327

(6),

2SC644(2),

VU=250

PWb/mm)

28C828

(28),

2SC1318(3),

2SA719(1),

Dolby

in;

kHz

2SC1096Z

(3),

2SC1384

(3),

Harmonic

Distortion:

2.0%

1,000

Hz)

2SD288

(1),

2SA666H(3),

2SC945(2),

Inputs:

MIC:

sensitivity

0.3

mV/applicable

2S8C1407

(2),

2SK30(2)

microphone

impedance

600Q~

Head:

HPF

head

for

rec/playback

head

20KQ

Diode

Rectifiers:

1$1211(8),

OA90Z(20),

OA91

(3),

LINE:

sensitivity

mV/110KQ

MA162(10),

RD7A(2),

FR202(6),

TUNER:

sensitivity

100

mV/190

M21C(2),

EQA0119(1),

10DC1

(3),

Outputs

LINE:

output

level

420

(max.)

1ODC1R(2)

impedance

over

Track

System:

4-track

2-channel

stereo

recording

HEADPHONE:

output

level

mV/8Q

and

playback

Rec/PB

Connection:

DIN

type

Recording

System:

bias

(90

kHz),

erase

Fast

Forward

and

Approx.

second

with

C-60

cassette

Tape

Speed:

4.8cm/s,

(1-7/8

ips.)

Rewind

Time:

tape

Program

Time:

hour

stereo

recording

with

C-60

Dimensions:

410mm(W)

140mm

(H)

360mm

(D)

cassette

tape

16-3/8”

(W)

5-1/2”

(H)

14-3/87

(D)

Wow

and

Flutter:

0.063%

(WRMS)

,+0.15%

(DIN)

Weight:

10.5

Kg,

(23-1/8

ips.)

These

specifications

are

subject

change

order

accommodate

improvements

design.

Matsushita

Electric

Industrial

Co.,Ltd.

Baga

MATSUSHITA

ELECTRIC

TRADING

CO.,

LTD.

begga

P.O.

Box

288

Central,

Osaka,

Japan

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Technics RS-676US Specifications

General

Type	Stereo Cassette Deck
Track System	4-track, 2-channel stereo
Tape Speed	4.8 cm/s
Heads	1 x erase
Motor	DC Motor
Tape Type	Normal, CrO2
Input Sensitivity	0.25mV (mic), 60mV (line)
Inputs	Line, Mic
Outputs	Line, Headphones

Summary

SPECIFICATIONS AND PARTS

SPECIFICATIONS

Technical specifications of the RS-676US cassette deck.

LOCATION OF PARTS

Identifies the physical location of various components on the unit.

REPLACEMENT PARTS LIST

Comprehensive list of all parts with part numbers and ranks.

MECHANICAL, ELECTRICAL, AND CABINET PARTS

Lists of mechanical, electrical components, cabinet parts, and accessories.

SERVICE PROCEDURES AND ADJUSTMENTS

DISASSEMBLY INSTRUCTIONS

Step-by-step guide for disassembling the unit for service.

TEST INSTRUMENTS AND MEASUREMENT CONDITIONS

Details required test equipment, conditions, and test tapes.

MEASUREMENT & ADJUSTMENT METHOD

Detailed procedures for key measurements and adjustments.

Dolby NR and FM Circuit Adjustments

Procedures for adjusting Dolby NR and FM circuits.

TECHNICAL DIAGRAMS

SCHEMATIC DIAGRAM MODEL RS-676 US

Complete circuit schematic of the device.

EXPLODED VIEWS

Visual breakdown of the unit's components for assembly/disassembly.

CIRCUIT BOARD LAYOUTS

Diagrams showing the layout of various circuit boards.

MODIFICATIONS AND CORRECTIONS

Modifications of RS-676 US

Details design changes and improvements to the unit.

Corrections of RS-676 US Service Manual

Lists errors and corrections for the service manual.

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