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 |
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1. RELATION OF P.C BOARD TITLE AND IDENTIFICATION NUMBER |
6 |
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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 |
20 watts per channel, minimum RMS, at 8 ohms from 20 to 20,000 Hz with no |
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more than 0.5% total harmonic distortion |
POWER BANDWIDTH (1HF) |
10 to 45,000 Hz/8 ohms (Total Harmonic Distortion 0.5%) |
SIGNAL TO NOISE RATIO (1HF) |
Phono: Better than 85 dB |
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Aux: Better than 95 dB |
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RESIDUAL NOISE |
Less than 0.8 mV at 8 ohms |
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CHANNEL SEPARATION (1HF) |
Phono: Better than 55 dB at 1,000 Hz |
DAMPING FACTOR |
More than 60 (1 kHz, 8 ohms) |
OUTPUT |
Speakers: A,B (4 to 16 ohms)/A+B(8 to 16 ohms) |
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Headphone: 4 to 16 ohms |
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2. Pre Amplifier Section
INPUTSENSITIVITYANDIMPEDANCE |
Phono: 3 mV/47 k ohms |
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AUX: |
150 m V/ 100 k ohms |
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Tuner: |
150 mV/100 k ohms |
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Tape Monitor: PIN; 150 mV/100 k ohms DIN; 150 mV/100 k ohms |
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OUTPUT LEVEL AND IMPEDANCE |
TapeREC: PIN; 150 mV/100 k ohms DIN; 150 mV/100 k ohms |
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FREQUENCY RESPONSE |
Phono (RIAA equalization) 30 to 15,000 Hz +-1 dB |
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TONE CONTROL |
BASS: ±9 dB at 100 Hz, TREBLE: ±7 dB at 10 kHz |
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LOUDNESS CONTROL |
+10 dB at 100 Hz, +5 dB at 10 kHz |
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(Volume Control set at -30 dB position) |
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FILTER |
HIGH: -6 dB at 10 kHz, LOW: -6 dB at 50 Hz |
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3. Others
SEMICONDUCTORS |
Transistors: 18, Diodes: 5, IC: 1 |
POWER REQUIREMENTS |
U.S.A. and Canada model: 120V, 60 Hz |
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CEE models: 220V, 50 Hz |
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Other models: 110/220/240V, 50/60 Hz switchable |
DIMENSIONS |
380(W) x 125(H) x 263(D) mm |
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( 1 5 x 4 . 9 x 10.3) inches |
WEIGHT |
5.5 kg (12.1 IDS.) |
NOTE: For improvement purposes, specifications and design are subject to change without notice.
II. DISMANTLING OF UNIT
In case of trouble, etc. necessitating disassembly, please disassemble in the order shown in photograph. Reassemble in reverse order.
1 |
5 |
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SCREWS |
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SCREWS |
2 |
6 |
FRONT PANEL
CABINET
SCREWS
SCREWS
3 |
7 |
BOTTOM
PLATE
ADJUSTMENT
SCREWS
4
A |
c |
L ) |
t
VII. CLASSIFICATION OF VARIOUS P. C BOARDS
1. RELATION OF P.C BOARD TITLE AND IDENTIFICATION NUMBER
P.C Board |
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Number of P.C Board |
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Main Amp P.C Board |
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M2-5018/A |
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MFC P.C Board |
micro |
M2-5019 |
LED P.C Board |
M2-5019A |
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VR P.C Board |
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M2-5019B |
Headphone P.C Board |
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M2-5019C |
Tone Control P.C Board |
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M2-5022 |
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