Technics SA-DA15 Instrucciones de construcción
Service Manual
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Order No. MD0105119C1
A2
AV Control Stereo Receiver
lSA-DA15
Color
(K) ... Black Type
(N) ... Gold Type
PP ... U.S.A. and Canada
FM Tuner Section
Frequency range 87.9-107.9 MHz
Sensitivity 11.2 dBf (2μV, IHF’58)
50 dB quieting sensitivity
MONO 18.3 dBf (4.5μV, IHF’58)
STEREO 38.3 dBf (45μV, IHF’58)
Total harmonic distortion
MONO 0.2%
STEREO 0.3%
S/N
MONO 73 dB
STEREO 67 dB
Frequency response 20 Hz-15 kHz,+1 dB, -2 dB
Alternate channel selectivity 65 dB
Capture ratio 1.5 dB
Image rejection at 98 MHz 40 dB
Spurious response rejection at 98 MHz 75 dB
AM suppression 50 dB
Stereo separation
1 kHz 40 dB
10 kHz 30 dB
Antenna terminal 75Ω (unbalanced)
AM Tuner Section
Frequency range 530-1710 kHz
Sensitivity 20μV, 330μV/m
Selectivity 55 dB
IF rejection (at 1000 kHz) 50 dB
Video Section
Output voltage at 1 V input (unbalanced) 1±0.1 Vp-p
Maximum input voltage 1.5 Vp-p
Input/output impedance 75Ω
Amplifier Section
Rated minimum sine wave RMS power output
20 Hz-20 kHz both channels driven
0.05% total harmonic distortion 100 W per channel (6Ω)
1 kHz continuous power output both channels driven
0.05% total harmonic distortion 105 W per channel (6Ω)
Total harmonic distortion
rated power at 20 Hz-20 kHz 0.05% (6Ω)
half power at 1 kHz 0.03% (6Ω)
Power bandwidth
both channels driven, -3 dB 10 Hz-100 kHz (6Ω, 0.9%)
Power output at the DVD 6CH operation
20 Hz-20 kHz (each channels driven)
0.05% total harmonic distortion
Front 2 x 100 W (6Ω)
Center 100 W (6Ω)
Surround 2 x 100 W (6Ω)
Low frequency damping factor 30 (6Ω)
Load impedance
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© 2001 Matsushita Electronics (S) Pte. Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law.
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Front
A or B 4 - 8Ω
A and B 8Ω
BI-WIRE 6 - 8Ω
Center 6 - 8Ω
Surround 6 - 8Ω
Frequency response
PHONO RIAA standard curve±0.8 dB
CD, DVD, TV, VCR1, VCR2, VCR3, TAPE 10 Hz-100 kHz,±3 dB
Input sensitivity
PHONO 0.4 mV (3 mV, IHF’66)
CD, DVD, TV, VCR1, VCR2, VCR3, TAPE 27 mV (200 mV, IHF’66)
S/N (IHF A) (VGCA ON)
PHONO 80 dB (80 dB, IHF’66)
CD, DVD (L/R/C/LS/RS), TV, VCR1, VCR2, VCR3, TAPE 113 dB (IHF A, Rated Power, S=2 V)
90 dB (100 dB, IHF’66)
Input impedance
PHONO 47 kΩ
CD, DVD, TV, VCR1, VCR2, VCR3, TAPE 22 kΩ
Tone controls
BASS 50 Hz,+10 to -10 dB
TREBLE 20 kHz,+10 to -10 dB
Subwoofer frequency response (-6 dB) 7 - 200 Hz
General
Power supply AC 120 V, 60 Hz
Power consumption 400 VA 310 W
Dimensions (W x H x D) 430 x 158 x 370 mm
(16-15/16” x 6-7/32” x 14-9/16”)
Mass 11.7 kg (25.8 lb.)
Power consumption in standby mode: 1 W
DIN POWER (1 kHz T.H.D. 1%) 2 X 100W (6Ω)
Notes:
1. Specifications are subject to change without notice./Mass and dimensions are approximate.
2. Total harmonic distortion is measured by the digital spectrum analyzer.
* Manufactured under license from Dolby Laboratories.“Dolby”,“Pro Logic” and the double-D symbol are trademarks of Dolby Laboratories.
** Manufactured under license from Digital Theater System.“DTS” and“DTS Digital Surround” are trademarks of Digital Theater System.
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1 Safety Precaution
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(This “Safety Precaution” is applied only in U.S.A.)
1. Before servicing, unplug the power cord to prevent an electric shock.
2. When replacing parts, use only manufacturer’s recommended components for safety.
3. Check the condition of the power cord. Replace if wear or damage is evident.
4. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields,
etc.
5. Before returning the serviced equipment to the customer, be sure to make the following
insulation resistance test to prevent the customer from being exposed to a shock hazard.
lInsulation Resistance Test
1. Unplug the power cord and short the two prongs of the plug with a jumper wire.
2. Turn on the power switch.
3. Measure the resistance value with ohmmeter between the jumper AC plug and each exposed
metal cabinet part, such as screw heads, antenna, control shafts, handle brackets, etc.
Equipment with antenna terminals should read between 3MΩ and 5.2MΩ toall exposed parts*.
(Fig 1) Equipment without antenna terminals should read approximately infinity to all exposed
parts. (Fig 2)
*Note: Some exposed parts may be isolated from the chassis by design. These will read infinity.
4. If the measurement is outside the specified limits, there is a possibility of a shock hazard. The
equipment should be repaired and rechecked before it is returned to the customer.
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2 Before Repair and Adjustment
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Disconnect AC power, discharge Power Supply Capacitors C1702, C703~C706, C742, C901, C904
through a 10 Ω, 5 W resistor to ground. DO NOT SHORT-CIRCUIT DIRECTLY (with a screw
driver blade, for instance), as this may destroy solid state devices.
After repairs are completed, restore power gradually using a variac, to avoid over current.
Current consumption at AC 120 V, 60 Hz in NO SIGNAL mode should be 450~1000 mA.
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3 Protection Circuitry
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The protection circuitry may have operated if either of the following conditions are noticed:
lNo sound is heard when the power is turned on.
lStops during a performance.
The function of this circuitry 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 ofthe amplifier are used.
If this occurs, follow the procedure outlines below:
1. Turn off the power.
2. Determine the cause of the problem and correct it.
3. Turn on the power once again after one minute.
Note:
When the protection circuitry functions, the unit will not operate unless the power is first turned off
and then on again.
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4 Accessories
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AC power supply cord... 1 pc.
AM Loop Antenna Set/... 1 set.
FM Indoor Antenna... 1 pc.
Remote Control/Transmitter... 1 pc.
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5.1 Front Panel
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5.2 Remote Control
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