Technics SEA 1010 Service Manual

Page 1

AD990716802

Service Manual

Specifications (DIN 45 500)

20 Hz - 20 kHz continuous power output
both channels driven:

1 kHz continuous power output
both channels driven (THD: 1 %):

2x70W(8£2)

2 X 85 W (8 S2)
2 X 120 W (4 Q)
63 Hz -- 12.5 kHz continuous power output

both channels driven (THD: 0.7 %): 2 x80 W (6 £2)
2 >< 105 w (4 (2)
Total harmonic distortion (THD)

rated power at 20 Hz - 20 kHz:
Intermodulatlon distortion

0.015 % (B (2)

(50 Hz : 7 kHz = 4: 1, SMFTE): 0.007 % (a 52)
Residual hum and noise: 0.3 mV
Damping factor: 70 (8 £2)

35 (4 Q)
Headphones output level/impedance: 540 mV/aao 52
Load impedance:

A or B; 4 £2 - 16 Q

AandB; 89-16:).
Input sensitivity/impedance:

NORMAL (INPUT LEVEL CONTROL Max.); 1 V/20 k9

DIRECT; 1 V/20 k9
SIN: 95 dB, rated power, 4 Q

115 dB (iHF '66), rated power, 8 t2

Stereo Power Amplifier

SE-A1010

Colour

(K)... ,...Black Type

(N)... ....Gold Type
Areas
(E)... Europe.

(EB). Great Britain.
(EG) ....... Germany.

Frequency response:

NORMAL; 5 H2 - 100 kHz (+0 dB, -3 dB)
20 Hz - 20 kHz (+0 dB, -O.5 dB)
(INF'UT LEVEL CONTROL Max.)
DIRECT; 5 Hz - 100 kHz (+0 dB, -3 dB)
20 Hz - 20 kHz (+0 dB, -0.5 dB)
I GENERAL
Power supply:
For (E) and (EG) areas; AC 50 Hz. 230 V
For (EB) area; AC 50 H2, 230 V - 240 V
Power consumption: 280 W
Standby; 1.6 W
Dimensions (Wx H>< D): 430x158x344 mm
Weight: 10.3 kg
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.

3. For (EB) area: The specification values given have been
measured while using a 240 V-power supply

A: WARNING

This service information is designed for experienced repair technicians only and is not designed for use by the general public.

It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product,
Products powered by electricity should be serviced or repaired only by experienced prolessional technicians. Any attempt to service
or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.

Technicsi

© 1999 Matsushita Electronic industrial Co.,Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.

Page 2

CONTENTS

Page

1 Before Repair -------------------------------------------------------------------------- 2
2 Protection Circuitry 2
3 Accessories ---------- 2
4 Caution for AC Mains Lead -------------------------------------------------- 3
5 Operations --------------------------------------------------------------------------- 4
6 Operation Checks and Component Replacement ProceduresQ
7 Type Illustration of le, Transistors and Diodes --12
8 Schematic Diagram ---------------- 3
8.1. Schematic Diagram Notes- 13

8.2. Schematic Diagram ------------------------------------------------------ 14

1 Before Repair

1.Turn off the power supply. Using a 10 £2. 10 W resistor,
connect both ends of power supply capacitors (C701,
C702) in order to discharge the voltage.

2. Before turning the power supply on. after completion of
repair, slowly apply the primary voltage by using a power
supply voltage controller to make sure that the consumed

2 Protection Circmtry
The protection circuitry may have operated if either of the
following conditions is noticed:

- No sound is heard when the power is switched ON.

. Sound stops during a performance.
The functions 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 of this unit are used.

3 Accessories

~ AC mains lead
(E) and (EG) areas : (RJA0019-X) ......... 1 pc.
(EB) area : (RJA0053-2X) ........................ 1 pc.

- Remote control cable
(SJP2257T) ............................................. 1 pc.

9 Printed Circuit Board Diagram --

10 Wiring Connection Diagram ------
11 Block Diagram ---------------------------------------------------------------------- 25
12 Measurements and Adjustments -------------------

12.1. Measuring Instruments and Special Tools-

12.2. Power MeterAdjustment ---------------------------------------------- 26
13 Replacement Parts List--
14 Cabinet Parts Location
15 Packaging ----------------------------------------------------------------------------- 34

current at 50 Hz in NO SIGNAL mode should be shown
below with respect to supply voltage 230/240 V.

AC 230 V, 50 Hz AC 240 V, 50 Hz
160-320 mA 160-320 mA

Power supply voltage
Consumed current

If this occurs. follow the procedure outlined bellow:
1.Switch OFF the power.
2. Determine the cause of the problem and correct it.
3. Switch ON the power once again.

Note:

When the protection circuitry functions. the unit will not
operate unless the power is first switched OFF and ON
again.