Technics SEHD 50 Service Manual

Page 1

ORDER NO. A09702017C2

Service Manual

System: SC-HD50
Colour
SB-HDEIIA (N) ............................................ Gold
Re t C trot Areas
m?§§m§." (E) ........................................... Europe
* (EG) .. Germany and Italy
(EB) .. ......... Great Britain
(EP) ............. East Europe and Russia

HS-HD70 SE-HDSI)

Because of unique Interconnecting cables, when a compact requires service,
send or bring In the entire system.

Specifications _

Amplifier Section General

Power output Power consumption: 90 W
DIN 1 kHz, THD 1 %, both channel driven: 2 X 23 W (6 ohm) Power SUPP'Y

HMS 1 kHz, THD 10 7:, both channel driven: 2 X 30 W (6 ohm)
Total harmonic distortion
Rated power at 1 kHz: 1 % (6 ohm)
Half power at 1 kHz: 0.09 In (6 ohm)
Load Impedance: 6 ohm
SIN (rated power): 90 dB

System/SOHDGO:

[for (E, EG, EP) area]: 230 V. AC 50 Hz

[for (EB) area]: 230- 240 v, AC 50 Hz
Dimensions: 196(W)l103(H)/255(D) mm
Weight: 3.5 kg

Notes:

1. Specifications are subject to change without notice.

2. Weight and dimensions are approximate.

3. Total harmonic distortion is measured by the digital spectrum
analyzer.

Tuner: ST- HD50 or ST HDSD, Compact Disc Player. SL- H060 Amplifier: SE-HDSO, Cassette Deck: FIS- -HD70, Speakers. 53- HDSOA

Notes: - ...... Made" In PAES

A WARNING

This service information is designed for experienced repair technicians only and, Is not designed ior use by the general public. It does not
contain warnings or cautions to advise non-technical individuals oi 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.

Technicsi

© 1997 Matsushita Electric Industrial Co., Ltd.
All rights reserved. Unauthorized copying
and distribution Is a violation of law.

Page 2

7 SE-HD5O

l Contents

Accessories..
Before Repair
Protection Circuttry.
Caution for AC Main Lead
Location of Controls ..
Installation
Connections .
Changing the Tone.
Convenient Functions
Operation Checks and

Main Component Replacement Procedures ..
To Supply Power Source ...............................

l Accessories

OAC power supply cord ........................... 1 pc.
For (EB) area For (E,EG,EP) area
(RJA0053~1X) (RJAOOI 9-2K)

I Remote control batteries
Note: These are available on sales route.

9

0 FM indoor antenna ................................ 1 pc.

(RSA0007)

%

0 Flat cable (Long thin) ............................ 1 pc.

(REXOBt 3)

H

l 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

2 pcs.

3 ~ 10 Packaging ...............
11
D Remote control transmitter .................... 1 pc.
For (E. EB, EP) area For (EG) area
(BAK-CH193WH)

(RAK-CH215WH)

0AM loop antenna set (RSA0021)
AM loop antenna .............
Antenna holder with stand.

Schematic Diagram ..........
2 Printed Circuit Board Diagram .
3 Type Illustration of ICs, Transistors and Diodes
3 Wiring Connection Diagram..
4 Block Diagram ...................
.. 4 Replacement Parts List (Electrical)
6 Resistors and Capacitors ................
7 Replacement Parts List
7 (Cabinet, Packing and Accessories)
Cabinet PartsLocation

0 Speaker cords ............... 2 pcs.
(REEDBSS)

Antenna holder without stand
Screw ................................. ,

@@Iflt

IAntenna plug adaptor ..................... 1 pc.
For (EB) area only
(SJPSOOS)

0 Flat cable (short) ................................... 1 pc.
(FIExosoe)

M

I Flat cable (Long thick) .......................... 1 pc.

(aexoata)

am

voltage 230 V,
Area (E) (E6) (EP) (EB)
Power supply voltage AC 230 V AC 240 V
Consumed current 50 Hz 50 ~ 170 mA 50 - 170 mA

U

Page 4

SE:HD50 [
I Location of Controls

1 2 3

/@
M3 €93?)
// //

45 ($6

I Installation

(D Power "STANDBY (blow switch (POWER, STANDBY (DION)
Press to switch the unit from on to standby mode or vice versa.
In standby mode, the unit is still consuming a small amount of
power.

® Standby lndlcator (STANDBY)
When the unit is connected to the AC mains supply, this indicator
lights up in standby mode and goes out when the unit is tamed
on.

© Volume control (VOLUME)

(43 Headphones lack (PHONES)

@ Balance control (BALANCE)

© Bass control (BASS)

® Treble control (TREBLE)

'a fin:
"omen-£1 cog-3r:

Locating the components

Slde-by-slde set-up

CD player
© Tuner

© Cassette deck
© Amplifier
© Left speaker
6) Right speaker

Stacking E

CD player
@ Tuner

© Cassette deCk
@ Amplifier

Cautlon:

Use the speakers only wlth the recommended system.
Fallure to do so many lead to the amplltler and/or the
speakers, and may result In the rlsk of fire.

Consult a qualltled servlee person It damage has occured
or it you experlence a sudden In pertormance.

Left and right speakers are exactly the same.

Page 15

SE-HDSO
l Printed Circuit Board Diagram

0 This circuit bbard diagram may be modified at any time with ihedevelopment of new technology. _

HEADPHONES * ' E OPERATiON P.C.B.

JACK P.C.B.

(P15242284 S)

m PROTECTION P.C.B.

(HEP2423A-M) 4

(fiEFEdZZB-i 5)

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