Sharp OPTONICA SM-4646H Service Manual

STEREO PRE/MAIN-
AMPLIFIER
MODEL
SM-4646H
(Silver Panel)
SM-4646HB
(Black Panel)
ie the interests of user-safety the set a
be restored to its original condition and only
| Parts identical to those specified be used.
CAUTIONS:
In the case of this model SM-4646H/HB, since
the power supply voltage and current capacity
are relatively high, the potential remains at it
SPECIFICATIONS
GENERAL DESCRIPTION
a.c. 110/220/240 V, 50/60 Hz
520 W
2-IC (Integrated circuit)
39-Transistor
8-FET
25-Diode
1-LED
Width: 442 mm
Height: 144 mm
Depth: 363 mm
16 kg
Power source:
Power consumption:
Semiconductors:
Dimensions:
Weight:
MAIN AMPLIFIER
Circuit: Differential amplifier, complementary system, OCL
(Output Capacitor-Less)
Continuous power output:
2 x95W/4ohms, Both channels driven
at 1 kHz, 0.05% distortion
2 x70 W/8 ohms, Both channels driven
at 1kHz, 0.05% distortion
2 x85 W/4 ohms, Both channels driven
at 20 Hz ~ 20 kHz, 0.05% distortion
2 x60 W/8 ohms, Both channels driven
at 20 Hz ~ 20 kHz, 0.05% distortion
intermodulation distortion:
0.05% at 95W
more than 50 (at 1 kHz, 8 ohms)
5 Hz~ 40 kHz at 0.1%
distortion, 47.5 W
Input sensitivity and input impedance:
650 mV/50k ohms
Damping factor:
Power bandwidth:
PRE-AMPLIFIER
Equalizer amplifier:
FET-Differential amplifier, ICL (Input Capacitor-Less),
dual power supply (plus and minus)
Tone control:
FET-Differential amplifier, ICL, Dual power
is without decreasing in about 20minutes even
after the power switch is turned off. When
handling or repairing this set, pay due attention
to this regard.
supply (plus and minus), 'NF' type
Input sensitivity and input impedance:
PHONO 1: 2.5 mV
22k ohms, 47k ohms,
100k ohms
PHONO 2: 2.5mV~5 mV/47k ohms
AUX: 150 mV/47k ohms
TUNER: 150 mV/47k ohms
TAPE PB 1 and 2:
150 mV/47k ohms
TAPE PB (DIN socket) 1 and 2:
150 mV/47k ohms
Output level and load impedance:
REC 1 and 2: 150 mV/47k ohms
REC 1 and 2 (DIN socket)
30 mV/82k ohms
Phono overload: 350 mV (RMS, 1 kHz)
RIAA curve deviation:
+0.3dB (20 Hz ~ 20 kHz)
Frequency response:
5 Hz ~ 70 kHz +1.5dB (TUNER, AUX,
TAPE PB)
Signal to noise ratio:
PHONO 1 and 2: 70 dB
AUX, TUNER, TAPE PB: 90dB
Tone control:
Bass: +10dB (at 100 Hz, turnover 600 Hz}
+10dB (at 50Hz, turnover 300 Hz)
Treble: +10dB (at 10 kHz, turnover 1.5 kHz)
+10dB (at 20 kHz, turnover 3 kHz)
Low cut filter: —3dB at 30Hz, 12 dB/oct.
—3dB at 10 Hz, 12 dB/oct.
—3dB at 7 kHz, 6 dB/oct.
—3dB at 20kHz, 6 dB/oct.
Audio muting: —20 dB
Specifications of this model are subject to
change without prior notice.
High cut filter:
SHARP CORPORATION OSAKA, JAPAN
SM-464 SM-