Technics SAEH 550 Service Manual

Page 1

Service

Remote Control

* SB-EH550

* SB-EH550

ORDER NO. AD990306202

Manual

Tuner/Amplifier

SA-EH550

Colour
(S) ........ Silver Type

Transmitter Areas
(E) . Europe.
(EB) Great Britain.
(EG) .. .. Germany,
itaiy, France,
RS-EH750 SA-Eiisso Netherlands
and Denmark.
Ejeause oi unique lnterconnecting cables, when a componeij (EP) """ CIS
requires service, send or bring in the entire system.
, System SC-EH550
Sound Processor SH-EH550
m" "° ' Tuner/Amplifier SA-EHSSO
CD Player SL-EH550
Drop No. Cassette Deck RS-EH750
Front Speakers SB-EH550

Specificati Cuatomari TECHNI C342 * : Made In Singapore
' Land: seoum

Amplifier Secti

paw outputtat p Mad-i innaeaseezcz Qty : 1 522 - 1629 kHz (9 kHz steps)
DIN 1 kHz. THD 1 a 520 - 1630 kHz (10 kHz steps)

bothchunnelsi ankle at: as aszawoe f): 500 uV/m
RMS1 kHz, THD 10 %, Timer Section

both channels driven: (HIGH) 2 x 40 W (6 n) Clock: Quartz . lock type

. (LOW) 2 x 50 W (6 0) Function: Play timer (1 time, daily)

PMPO 1 kHz. 1.400 W Rec timer (1 time. daily)

(LOW 5 9, HIGH 6 9) Sleep (120 min, 30 min intervals)

Total harmonic distortion: Setting (Play/Rec): 1 minute - 23 hours 59 minutes
Rated power an kHz: 1 % (6 0) (1 min intervals)
Halt power eti kHz; 0.1 % (6 a)

Lead impedance:

MAIN; (T32) 28 vavneerlsaJpply'

S.WOOFER: ( ) (E),(EG),(EP) areas; AC 230 V, 50 Hz
Center frequency; 70 Hz (EB) area; . AC 230 - 240 V, 50 Hz
LEVEL (VOL-20 dB): MID +8 dB ngidizfisumm'm- ° W

MAX +12 dB Normal; 11 W
ECO mode; 0.6 W

FM tuner Section Dimensions (WXHXD): 293x118.5><342.5 mm

Frequency range: 87.50 - 108.00 MHz (0.05 MHz steps) Weight: 4.3 kg

Sensitivity: 1.8 W (iHF usable)

SI! 23 B'- 1-5 V Notes: Specifications are subject to change without notice.

S/N- Weight and dimensions are approximate.

MONO? 70 dB (75 dB, 'HF) Total harmonic distortion is measured by the digital spectrum

Antenna terminai(s): 75 n (unbalanced) anatizer

AWARNING

This service iniormation 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.
ProductsEpowered by electricity should be serviced or repaired only by experienced proiessionai technicians. Any attempt to service or
repair the product or products dealt with in this service iniormation by anyone else could result in serious injury or death.
_ . ® @1999 Matsushita Electric industrial Co., Ltd.
All rights reserved. Unauthorized copying
TeChnlcs and distribution is a violation of law.

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SA-EH550

I Contents

Page Page
Before Repair .2 Surround System 16
Protection Circuitry . 2 Using the Virtual Dolby Surroun 17
Accessories . . 2 Enjoy the Sound with Simulated Ster 17
Caution for A . 3 Using the Seal Position Function 18
Location of Controls . 4 Concerning the Display 18
installation . 5 Using an External Unit . . 19
Turning the Demo Function Off (DEMO) . 5 Operation Checks and
Connections ........ 6~7 Component Replacement Procedures

Preparing the Home on ro
External Unit Connections...

Optional Antenna Connections
Setting the Time

Self-Diagnostic Mode
Schematic Diagram
Printed Circuit Board Diagram
Wiring Connection Diagram
ECO mode Type illustration of iCs, Transistors a
Listening to C p lSC 10~12 Terminal Function of iC's .
Boosting the Super Woote . 13 Block Diagram ........
Using the Built-in Sound Quaiit .. 13 Replacement Parts List.
Varying the Sound Quality Cabinet Parts Location

with the Manual Equalizer (Manual EQ) .......................................... 14 Packaging ................
Varying the Sound Quality

with the Acoustic image (Al) Equalizer (3D Ai EQ) ..................

l Before Repair

(1) Turn off the power supply. Using a 10 Q, 10 W resistor, connect both ends of power supply capacitors (c701, C703 and C702, C704) 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 50/60 Hz in NO SiGNAL mode should be shown below with respect to supply voltage 230/240V.

wcommw

y/Sound Field Settings

15

Power supply voltage AC 280 V AC 240 V
Consumed current 50 Hz 70 ~ 250 mA

I Protection Circuitry

The protection circuitry may have operated if either of the following conditions is noticed:
o No sound is heard when the power is switched ON.
0 Sound stops during a performance.
The functions of this circuitry is to prevent circuitry damage it, for example, the positive and negative speaker connection wires are "shorted", or ii
speaker systems with an impedance less than the indicated rated impedance of this unit are used.
it this occurs, follow the procedure outlined below:
1. Switch OFF the power.
2. Determine the cause of the problem and correct it.
8. Switch ON the power once again.

Note:
When the protection circuitry iuncticns, the unit will not operate unless the power is first switched OFF and then ON again.

I Accessories

0 AC power supply cord for (E).(EG),(EP) areas - AC power supply cord for (EB) area - AM loop antenna set
(RJA0019-X) _ (RJA0053-2X) ........................ t ............ 1 po. (RSA0022.J)

- FM indoor antenna . Speaker cords I Antennai plug adaptor for (EB) area only
(RSAOOO7) ........................................... 1 pc. (REE0499) .. .. 2 pcs. (supsooe) ............................................ 1 pc.
(REE0853) ..
0 Remote control transmitter - Batteries
(RAK-EHA18WH) ................................. 1 pc. (UM-3, "AA", R6/LR6) ........................ 2 pcs.

Note: These are available on sales route.