Technics SEA 800 SM 2 Service Manual

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ORDER NO. AD970709802

Service Manual

Amplifier
SE ABOOSM2
-
su-caooum Colour
Remote Control (K) ...... Black Type
Transmitter
Areas
(E) ........ Europe.
(EB). .. Great Britain.

(EG) ...... Germany.

ss-Aaoosm
System: su-Asooomz
Because of unique interconnecting cables, when a component Control amplifier SU-CaOOUM2
requires service, send or bring in the entire system. power amplifier SE.A3005M2
Specrfications (DIN 45 500)
20 Hz - 20 kHz continuous power output I GENERAL
both channels driven 2 x 55 W (B 9) Power supply
1 kHz continuous power output For (E) and (EG) areas AC 50 Hz, 230 V
both channels driven (THD 1 %) 2 x70 W (B O) For (EB) area AC 50 Hz, 230 V - 240 V
2 x 100 W (4 9) Power consumption 230 W
63 Hz - 12.5 kHz continuous power output Dimensions (W x H x D) 430 x136 x348 mm
both channels driven (THD: 0.1 %) 2 x65 W (8 0) Weight 8.7 kg
2 x 85 w (a Q)
Total harmonic distortion Notes:
rated power at 20 Hz - 20 kHz 0.015 % (8 Q) 1. Specifications are subject to change without notice.
lntermoduratlon distortion Weight and dimensions are approximate.
(50 Hz : 7 kHz = 4 : 1, SMPTE) 0.007 % (8 Q) 2. Total harmonic distortion is measured by the digital spectrum
Residual hum and noise 0.3 mV analyzer.
Damping factor 70 (B Q)
35 (4 o)
Headphones output level/impedance 540 mV/Sao (2
Load impedance
Aor B, Bl-WIRING 40-169
A and B 8 Q - 16 9
Input sensitivity/Impedance 1 V/33 k9
SIN (rated power, 4 Q) 95 dB (110 dB, IHF 66)
Frequency response 5 Hz - 70 kHz (+0 dB, -3 dB)

+0 dB, -0.5 dB (20 HZ -20 kHz)

AWARNING
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 professional 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.

© 1997 Matsushita Electric Industrial Co., Ltd.

. ® All rights reserved. Unauthorized copying
ec nlcs and distribution is a violation of law.

Contents

Page 2

SE-ABOOSMZ

I Contents

Before Repair .............................................................
Protection Circuitry .
Accessories ........
Caution for AC Mains Lead
Connecting the Audio Components
Connecting the Speakers and Power upp y
Front Panel Controls .
Listening to Soun

'U
I'D
u:
0
U
Q!
(a
(9

Schematic Diagram
Printed Circuit Board
Type illustration of ICs, Transistors and Diodes.
Wiring Connection Diagram .............................
Block Diagram
Replacement Parts LIst (Electrical)
Replacement Parts List (Resistors and Capacitors)
Cabinet Parts Location ............................................

ommmbwmmm

3 >1

Recording . Replacement Parts List (Cabinet, Packing and Accessories)
Operation C ec an Packaging ..............................................................................
Main Component Replacement Procedures ............................. 8 - 11

I Before Repair

(1) Turn off the power supply. Using a 10 Q, 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 current at 50 Hz in NO SIGNAL mode should be shown below with respect to supply
voltage 230 V/240 V.

Power supply voltage AC 230 V AC 240 V

Consumed current 50 Hz 100 ~ 200 mA 100 ~ 200 mA

I Protection Circuitry

The protection circuitry may have operated it either of the following conditions is noticed:

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

0 Sound stops 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 it speaker systems with an impedance less than the indicated rated impedance of this unit are used.

If this occurs, follow the procedure outlined below:

1. Switch OFF the power.

2. Determine the cause of 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 then ON again.

I Accessories

I AC power supply cord - Amplifier connection cable 0 Remote control transmitter
(E) and (EG) areas : (RJA0019-2K) 1 (RJL6D001310) .................................... 1 (RAK-SUZZBWH) ................................. 1

(EB) area : (RJA0049-K) ....................... 1 0 Stereo connection cable 0 Batteries for remote control transmitter
(SJP227G) ............................................. 1 (UM-4, AAA", R03) .............................. 2
Note: These are available on sales route.
(EKG (Elk?