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Service Manual
Stereo Integrated Amplifier
SPECIFICATIONS
(DIN
45
500)
• MAIN AMP. SECTION
(POWER AMP. DIRECT Input)
20 Hz 20 kHz continuous power output
both channels driven
1 kHz continuous power output
both channels driven (THD: 1%)
63 H ~ 12.5 kHz continuous power output
both channels driven (THD: 0.7%)
Total harmonic distortion (Power A mp Direct Input)
rated power at 20 Hz~20 kHz 0.007% (8 Ω)
half power at 20 Hz ~ 20 kHz 0.005% (8 Ω)
Intermodulation distortion (SO Hz: 7 kHz = 4:1. SMPTE)
rated power 0.007 % (8 Ω)
Residual hum and noise 0.2 mV
Damping factor 60 (8 Ω). 30 (4 Ω)
Headphones output level and Impedance 540 mV/330 Ω
Load Impedance
A or B, BIWIRING 4 Ω1 6Ω
Aand B 8Ω16Ω
PRE AMP. SECTION
Input sensitivity a
Phono maximum Input voltage (1 kHz, RMS)
and impedance
PHONO MM 25 mV/47 kΩ
PHONO MC 170 µV/220 Ω
TUNER, CD, AUX, TAPE 1, TAPE 2/DAT 150 mV/22 kΩ
POWER AMP DIRECT 1 V/18 kΩ
MM 160 mV.
MC 12 mV.
2 x
50 W (8 Ω)
2x65 W (8 Ω)
R O M
2X9 0 W (4 Ω)
2 x
60 W (8
2
× 80 W (4
IMF'
IMF'
oM)
SUVX500
Areas
Country
Code
(E)
Continental Europe
Great Britain
(EB)
(EG)
F.R. Germany and Italy
Asia. Latin America.
(GC)
Middle Near E as t an d
Africa
(GN)
Oceania
S/N (rated power, 4 Ω)
PHONO MM 78 dB (85 dB. IMF' 66)
PHONO MC 66 dB (S = 250 µV. 67 dB, IHF` 66)
POWER AMP DIRECT
S/N at ~ 26 dB power (4 Ω)
PHONO MM 76 dB
PHONO MC 66 dB
Ω)
66
66
TUNER, CD, AUX, TAPE 1, TAPE 2/DAT 84 dB
SIN at 50 mW power (4 Ω)
PHONO MM 75 dB
PHONO MC 66 dB
TUNER, CD, AUX, TAPE 1, TA PE 2/DAT 78 dB
Frequency response
PHONO MM RIAA standard curve
TUNER, CD, AUX. TAPE 1, TAPE 2/DAT
POWER AMP DIRECT 2 Hz~120 kHz (+0, 3 dB)
Tone controls
BASS 50HZ, +10 dB, 10dB
TREBLE 20kHz +10 dB, 10 dB
Loudness control (volume at 30 dB ) 50 Hz. +9 dB
Output vo ltage
TAPE 1, TAPE 2/DAT REC OUT 150 mV
+0 dB, 0.2 dB (20 Hz~20 kHz)
+0 dB. 0.2 dB (20 Hz~20 kHz)
Amplifier
Color
(K) Black Typ e
Area
3Hz100kHz(+0, 3dB)
Color
97 dB (99 dB. IHF'66)
106
dB
(115
dB, IHF
±0.8 dB (30 Hz~15 kHz)
(K)
'661
Technics
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• GENERAL
Power consumption
Power supply
• for Great Britain and Oceania
F.R. Germany, Italy and Continental Europe:
for Others: AC 50760 Hz. 110 V/127 V/220 V/240 V
530 W
AC 50/60 Hz. 230/240 V
Dimension.
(W x H x D)
430x 125x316
Weight 8,1 kg (17.82 Ib.)
Notes:
1. Specifications are subject to change without notice.
Weight and dimensions are approximate.
2. Total harmonic distortion is measured by the digital spectrum
analyzer.
(16-15/16" x4-15/16"x 12-7/16")
mm
• CONTENTS
BEFORE REPAIR AND ADJUSTMENT 2 PRINTED CIRCUIT BOARDS 15-1
PROTECTION CIRCUITRY 2 WIRING CONNECTION DIAGRAM 1
ACCESSORY 2 BLOCK DIAGRAM 2
LOCATION OF CONTROLS 3 MEASUREMENTS AND ADJUSTMENTS 2
CONNECTIONS 4-6 REPLACEMENT PARTS LIST 22-24,2
DISASSEMBLY INSTRUCTIONS 7-10 CABINET PARTS LOCATION 25 2
SCHEMATIC DIAGRAM 11-14 PACKAGING ' 2
Page Pag
I BEFORE REPAIR AND ADJUSTMENT
(1) Tum off the power supply. Using a. 10oM, 10 W resistor, shortcircuit both ends of power supply capacitors C001, C002. C705
and C706 in order to discharge the voltage.
(2) Before turning on th e power switch of the unit,
A. Connect the voltage controller to the primary side.
B.
Connect
the AC
ampere
meter
to the
primary side
or
conned
the DC
voltage
meter
to the
"±B"
circuit
of the
side.
C. Turn the VR of ICQ (VR451, VR452. VR501 and VH502) to minimum (counterclockwise).
D.
Alter
setting
the
output
to
zero
of the
And increa se the output of voltage controller gradually.
Then, check carefully whether the current value of primary side become more than following value or whether the DC
voltage of secondary side is increasing slowly.
E. II the value of current is increasing unusually or the DC voltage is not increasing, lower the output level of voltage
controller Immediately.
•The current value of the primary side at no signal. (Confirm the power supply voltage ot each area and provided voltage of
the unit.)
Power supply voltage
Consumed current
voltage controller,
50 Hz
turn
AC 1 1 0 V
210-500
250-540 mA
AC
on the
120V
power switch
mA
AC 220V
90-370 mA
of the
unit.
80-360 mA
secondary
AC
230
V
AC
240
V
70-350 mA
I PROTECTION CIRCUITRY
The protection circuitry of the amplifier may have operated if either of
the following conditions is noticed:
•No sound Is heard when the power is turned on.
•Sound stops during a performance.
The function of thi s circ uitr y is to prevent circuitry damage if, for
example, the positive and negative speaker connection wires are
"shorted", or if speaker systems with an impedance less than the
indicated rated Impedance of the amplifier are used.
I ACCESSORY
It this occurs, follow the procedure outlined below:
1. Turn off the power.
2. Determine the cause of the problem and correct it.
3. Turn on the power once again.
Note:
When the protection circuitry functions, the unit w i ll not operate
unless
the
power
is
first
turned
off and
•AC power supply cords
<SFDAC05E03> For (E), (EG) areas.
<SJA193> For ( EB) a re a only.
<RJA0004> For (GC) area only.
<SJA173> For (GN) area only.
then
on
again.
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