Technics SAEH 50 Service Manual

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ORDER NO. A09703053C8

Service Manual

Tuner/Amplifier

System: 55-3450 Tuner/Amplifier Q A E I I R n
*1 semen *' SBEHHO on" L. I l J U
For :._»___» . 2
(E)I(EP), (EB) and l _
(EG) areas ' Colour
(K) Black
I Remote Control Area
. _ mm (E)!(EP) Europe, Russia.
SL'EH5O strEt-rso (EB) ......... Great Britain.
For 5345 , ns-EI-reo SA-EHSO 53 EH (EG)- Germany and Itary.
(60) area , rise-econ (GC) .. Asra, Latin America,
= Middle East and Africa.
SB-P560
a Remote-Control Because of unique interconnecting cables,
. , - Transmitter when a component requires service, send
SL-EHso Sit-EH50 or bring in the entire system.
Specifications
Amplifier Section v.BAss mode -.
Power output : Center frequency ; 60 Hz
DIN 1 kHz,THD1%, both channels driven LEVEL (voL-ao dB) ; +3 dB
For (E),(EB),(EG) and (EP) areas ; 2 )< 50 W46 ohm) .
For (66) area ; 2 x 35 we ohm) FM tuner SEGNO!
RMS 1 kHz, THD 19%, both channels driven Frequency range . also-108,00 MHz (0.05 MHZ steps)
For (E),(EB),(EG) and (so) areas ; 2 x 70 wrs ohm) Senflilvflw 13 Will-1F usable)
For Go area ; 2 X 50 was ohm) 51! 25 3? 1 59V
P mode ' Alb-t0; .c as {75 dB, 1H?)
DIN 1 kHz, THD 11% Stereo separation at'l KHz; 35 :13
MAIN (both channels driven) : 2 X 30W(6 ohm) Antenna terminal(s) ; 75 ohm (unbalanced)

CENTER ;
SURROUND ;

HMS 1 kHz, THD 10%
MAIN (both channels driven) :

ao W(E ohm)
30W(4 ohm + 4 ohm)

2 X 40 was ohm)

AM tuner section
Frequency range : 522-1 511 kHz (9 kHz steps)

530-1620 kHz (10 kHz steps)

CENTER ; 40 W (5 ohm) Sensitivity (SIN 20 dB) . 500 pV/m
SURROUND ; 4o wr4 ohm + 4 ohm) Timer section
PMPO 1 kHz ; 1400 W Clock: Quartz-look type
(MNN 6 ohm, CENT 8 Ohm. SURR 4 ohm + 4 ohm) Function ; Play timer (1 time dayiy). REC timer (1 time dayly),
Total harmonic distortion : Sleep (120 min., 30 min. intervals)
Rated power at 1 kHz i 1 M5 ohm) Setting : 1 minute-23 hours 59 minutes (1 min intervals)
Halt power at 1 kHz ; 0.09 i5/46 ohm)
Load impedance : General
MAN 1 6 ohm - 8 ohm Power consumption : 120 W
CENTER ; 8 ohm Power supply :
SURROUND; 4 ohme 5 ohm) For (E),(EG),(EP) areas ; AC 220 V, 50/60 Hz
SIN (rated power) : For (EB),(GN) areas ; AG 230-240 V, 50 Hz
MAIN ; 50 dB For (66) area ; AG 1 10/127/220I230-240 V, 50/60 Hz
Frequency response ; 50 112-30 kHz (»3 :19) Dimensions : 287(W)/118.5(H)/343.5(D) mm
Input sensitivity/impedance : Weight : 4.4 kg

EXTERNAL, AUX ; 250 mV115 kohm
Output level :
EXTERNAL RECOUT; 250 mVI1.5 kohm
System/SGEHSO:

For (E),(EB),(EG) and (EP) areas
Sound processor: SH-EHSO,
Front speakers: * SB-EHGO
For (GC) area
Sound processor: SH-EHSD,
Front speakers: SB-EH50,

Note: *1 ...Made in PAES.

Tuner/Amplifier: SA-EHSO,

Tuner/Amplifier: SA~EH50,
Center speaker: *4 SB-PCGD,
*2...Mad9 in MESA

Note: Specifications are subject to change without notice.
Weight and dimensions are approximate.

Compact disc player: SL-EHBO, Cassette deck: RS-EHSO,

Compact disc player: SL-EHSO,

Cassette deck: Fl S-EHBB,
Surround speakers: *2 SB-PSSD '

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 sarvlced or repaired only by experienced professional technicians. Any allempt 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

© 1997 Matsushita Electric industrial 00., Ltd.
All rights reserved. Unauthorized copying
and distribution is a violation-of law.

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SA-EHSO
I Contents

Before Repair .....
Protection Circuitry
Accessories ........
Caution for AC Main Lead
Connections .
Installation
Location oi Controls
Setting the Time .

2 Schematic Diagram ..........................................
2 Type Illustration of 10's, Transistors and Diodes. ..... 41
2 Printed Circuit Board Diagram
3 Wiring Connection Diagram .
6
7
7
8

Terminal Function of lCs .
Block Diagram ..............
Replacement Parts List (Electrical) [For (E) and (EB) areas]
Resistors and Capacitors [For (E) and (EB) areas]

Memory Presetiing Replacement Parts List (Electrical) [For (EG) and (EP) areas] .. 63, 64
Listening to Radio Broadcasts Resistors and Capacitors [For (EG) and (EP) areas]. . 65 ~ 67
Enjoying RDS Broadcasts [For (EG) and (EP) areas] Replacement Parts List (Electrical) [For (GC) area] . 68 ~ 70

Operation Checks and

Main Component Replacement Procedures.
To Supply Power Source ........
About the Self-Diagnostic Mode .

I Before Repair

(1) Turn off the power supply. Using a 10 Q, 10 W resistor, connect both ends of powersupply capacitors (C701, C703 and C702, 0704) 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 N0 SIGNAL mode should be shown below with respect to supply voltage 110w 230V] 240V.

Resistors and Capacitors [For (GC) area]
Replacement Parts List (Cabinet, Packing and Accessory
Cabinet Parts Locatio
Packaging ..................

Area (E) (co) (EP) (EB) (GO)
Power supply voltage AC 230 V AC 240 V Ac 110 V AC 240 V
Consumed current 50 Hz 70 ~ 250 mA 70 ~ 250 mA 240 - 600 mA 70 - 250 mA

I Protection Circuitry

The protection circuitry may have operated it either oi the following conditions is noticed:
vs No sound is heard when the power is switched ON.
=k 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 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 problem and correct it.
3. Switch ON the power once again.
Note: ,
When the protection circuitry tunctions, the unit will not operate unless the power is first switched OFF and then ON again.

I Accessories

0 AC power supply card I Remote control transmitter 0 Speaker cords
For(E)I(EPi.(EG)and(GC)areas: (mAOOieX)m 1 pc. For [E)l(EP).(EB) and (EG) areas: (RAK-CHQEWH) -.1 pc. (REEO499) ........................................... 2 pc.
For (EB) area. (HJAGGSS-ix) ................. 1 pc. For (66) area: (RAK-CHZZDWH) ......... 1 pc.

For (EiliEPMEG) and (EC) areas For (EB) area

0 FM indoor antenna 0 AM loop antenna 0 Antenna holder
For(E)I(EP),(EB) and (EG)areas:(RSA0007) .. 1 pc. (RSADO12) ............................................ 1 pc. (RMN0244) ........... 1 pc.
For (60) area: (FISAODOS) ................... 1 pc.

0 Mounting screw

(XTN3+12AFZ) . 1 pc.
For (EMEGMEG) and (EP) areas For (GO) area
0 Batteries I Antenna plug adaptor I AC plug adaptor
(UM-4, "AAA", H03) ............................. 2 pc, (SJPSOOQ) ............................................ 1 pc. (SJP5213-1) ......................................... 1 pc.

Note: These are available on sales route.

(EB) area only

-2-

(SC) area only