Page 1
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.
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I. TECHNICAL DATA
1. Power Amplifier Section
Continuous Power Output
POWER BANDWIDTH (1HF)
SIGNAL TO NOISE RATIO (1HF)
RESIDUAL NOISE
CHANNEL SEPARATION (1HF)
DAMPING FACTOR
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
INPUT SENSITIVITY AND IMPEDANCE
OUTPUT LEVEL AND IMPEDANCE
FREQUENCY RESPONSE
TONE CONTROL
LOUDNESS CONTROL Phono: 3
mV/47 k ohms
AUX: 150 m V/ 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 de sign are subject to change without notice.
