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SECTION 1

SERVICE MANUAL

TABLE OF CONTENTS

I. TECHNICAL DATA 2

II. DISMANTLING OF UNIT 3

III. CONTROLS 4

IV. PRINCIPAL PARTS LOCATION 4

V. LEVEL DIAGRAM 5

VI.

MAIN

AMP

ADJUSTMENT

..........................

5

VII. CLASSIFICATION OF VARIOUS P.C BOARDS.................................... 6

1. RELATION OF P.C BOARD TITLE AND IDENTIFICATION NUMBER 6

2. COMPOSITION OF VARIOUS P.C BOARD . 7

For basic adjustments measuring methods, and operating principles, refer to GENERAL OPERATING

PRINCIPLES AND ADJUSTMENTS.

I. TECHNICAL DATA

1. Power Amplifier Section

Continuous Power Output

POWERBANDWIDTH(1HF)

SIGNAL TO NOISE RATIO (1HF)

RESIDUAL NOISE

CHANNEL SEPARATION (1HF)

DAMPINGFACTOR

OUTPUT

20 watts per channel, minimum RMS, at 8 ohms from 20 to 20,000 Hz with no

more than 0.5% total harmonic distortion

10 to 45,000 Hz/8 ohms (Total Harmonic Distortion 0.5%)

Phono: Better than 85 dB

Aux: Better than 95 dB

Less than 0.8 mV at 8 ohms

Phono: Better than 55 dB at 1,000 Hz

More than 60 (1 kHz, 8 ohms)

Speakers: A,B (4 to 16 ohms)/A+B(8 to 16 ohms)

Headphone: 4 to 16 ohms

2. Pre Amplifier Section

INPUTSENSITIVITYANDIMPEDANCE

OUTPUT LEVELAND IMPEDANCE

FREQUENCY RESPONSE

TONE CONTROL

LOUDNESS CONTROL

Phono: 3 mV/47 k ohms

AUX: 150 mV/100 k ohms

Tuner: 150 mV/100 k ohms

Tape Monitor: PIN; 150 mV/100 k ohms DIN; 150 mV/100 k ohms

TapeREC: PIN; 150 mV/100 k ohms DIN; 150 mV/100 k ohms

Phono (RIAA equalization) 30 to 15,000 Hz +-1 dB

BASS: ±9 dB at 100 Hz, TREBLE: ±7 dB at 10 kHz

+10 dB at 100 Hz, +5 dB at 10 kHz

(Volume Control set at -30 dB position)

FILTER HIGH: -6 dB at 10 kHz, LOW: -6 dB at 50 Hz

3. Others

SEMICONDUCTORS

Transistors: 18, Diodes: 5, IC: 1

POWER REQUIREMENTS U.S.A. and Canada model: 120V, 60 Hz

CEE models: 220V, 50 Hz

Other models: 110/220/240V, 50/60 Hz switchable

DIMENSIONS

380(W) x 125(H) x 263(D) mm

(15x4.9x 10.3) inches

WEIGHT

5.5 kg

(12.1

IDS.)

NOTE: For improvement purposes, specifications and design are subject to change without notice.

II.DISMANTLINGOFUNIT

Incaseoftrouble,etc.necessitatingdisassembly,pleasedisassembleintheordershowninphotograph.Reassemblein

reverseorder.

1

SCREWS

SCREWS

CABINET

SCREWS

SCREWS

ADJUSTMENT

t

A

c

L)

SCREWS

6

5

2

7

BOTTOM

PLATE

3

4

FRONTPANEL

micro

VII. CLASSIFICATION OF VARIOUS P. C BOARDS

1. RELATION OF P.C BOARD TITLE AND IDENTIFICATION NUMBER

P.C Board Number of P.C Board

Main Amp P.C Board

MFC P.C Board

LED P.C Board

VR P.C Board

Headphone P.C Board

M2-5018/A

M2-5019

M2-5019A

M2-5019B

M2-5019C

Tone Control P.C Board M2-5022

2.COMPOSITIONOFVARIOUSP.CBOARD

1)MAINAMPP.CBOARDM2-5018/A,LEDP.CBOARDM2-5019A

3)VRP.CBOARDM2-5019B

WHT/CROSSBLK

M2-50.9

M2-5022

4)HEADPHONEP.CBOARDM2-5019C

ISPBl

5)TONECONTROLP.CBOARDM2-5022

WHT/LONGBLU

BALANCE

LOUDNESS

VOLUME

2)MFCP.CBOARDM2-5019

[TAPEMONITOR]