Technics SHEH 50 Service Manual

Page 1

ORDER NO AD970303108

Servrce Manual

.ESystem: SC-EH50

Sound Processor

Sound Processor

SH-EH5O

For (E) I (EP) areas
*' SB-EHBO *I se-EHeo Colour
, ' ~ (K) ...... Black
SL-EH50 SH-EHSO Area
, ' (E)/(EP) Europe, Russia.
§ (GO) ........ Asia, Latin America,
' Remote comm Middle East and
i _ Transmitter Africa.
S ne-EHso SA-EHsu
For (GC) area
. 335° SL-EH50 SH-Enso 53 EH50 [For(GC)area only]
- ' "SB-P660
DU DOLBV sunnounn
P a o - L o o I c
i SB-P350

RS-EHGO

SA-EHSO

Remote Control
Trans m ltter

Because of unique interconnecting cables, when a component
requires service, send or bring in the entire system.

Specifications

;EQISFP Section
MANUAL GEO :
Center frequency ; 100 Hz, 315 Hz, 1 kHz, 3.15 kHz, 10 kHz
Level control ;
. EQ SPACE mode (3 modes) : HALL, CLEAR, HEAVY
Acoustic Image Selector : 36 pattern

iDOLBY PRO LOGIC Section [For (60) area only]

9 PRO LOGIC mode : SURROUND, 3 STEREO

; CENTER mode: NORMAL, WIDE, PHANTOM
DELAY TIME : 20 ms (Fixed)

:SyslemISC~EH50:
For (E)I(EP) area
Sound processor. SH-EHSO,
Front speakers: *1 SB-EHGO
For (GC) area
. Sound processor: SH-EHSO.
' Front speakers: SB-EH50,

.Notes: *1 ...Made in PAES
*2 ...Made in MESA

Tuner/Amplifier: SA-EHSO,

Tuner/Amplifier: SA-EHSO,
Center speaker: *2 SB-PCBO,

i5,6,9dB

Spectrum analizer Section
Display mode : NORMAL, PEAKHOLD. AURORA

General
Dimensions : 2B7 (W)/89 (H)/273.5 (D) mm
Welght : 1.1 kg

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

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

Compact disc player: SL-EHSO,
Surround speakers: *1 SB-PSSO

Cassette deck: RS-EHGO,

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.

ETechniicsi

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

Page 2

SH-EHSO l
I Contents

Location of Controls
Changing the tone ..
Enjoying sound with DOLBY PRO LOGIC [For (30) area only]. .
Enjoying with SURROUND or3 STEREO [For (GC) area only] .
Operation Checks and

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

NOTE:

Page
14
15
15
16

17

Printed Circuit Board Diagram .........................
Type illustration of lC's,»Transistors and Capacitors ..
Wiring Connection Diagram .
Terminal Function of lC's
Block Diagram .............................. . ...................
Replacement Parts List (Electrical and Cabinet) 18
Resistors and Capacitors .................................... 19
Cabinet Parts Location ....................................................................... 20

Refer to the service manual for Model No. SA-EHSO (ORDER No. AD970305308) for information on Accessories,

Connections, Installation and Packaging.

I Location of Controls

M14165 4

6) E0 SPACE onlflat button (E0 SPACE ONIFLAT)

C2) Display mode select/demonstration button (DISP MODEl-DEMO)

® Display

@ DOLBY PRO LOGIC indicators (SURROUND, 3 STEREO, NORMAL, WIDE, PHANTOM) (GC) area onlyI
(5) Multi control buttons (MULTI CONTROL, > , A , < , V)

GS) Acoustic image EQ button (ACOUSTIC iMAGE E0)

(3) E0 SPACE preset/manual select button (PRESETIMANUAL)

oouav PRO Lootc onloff button (DOLBY PRO LOGIC, OFF/0N)-
@DOLBY PRO LOGIC mode select button (MODE)-

@DOLBY PRO LOGIC test signal button (TEST)-

®oouav PRO LOGIC center mode button (CENTER MODE)

Page 18

"SH-EH50

l Replacement Parts List (Electrical and Cabinet)

Names: 'Jmportrml safely narice:

Camponente identified by A mark have special characteristics impatient [or safety.
Furthermore. special pans which have purposes of lire-retardant (resistors). high-qualily sound (caparzilors), law-noise (resisiurs), etc. are used.
When replacing any at campcnenls. be sure In use only manulaclure's specified parts shown in the pans fist.

The parentheslzied lndrcalions in We Remarks columns specify Ihe areas. (Heler lo the cover page for area.)
Pans wltlrcul these indicatiuns can be used [or all areas.

~[M] lndicales in Remarks columns parts ihal are supplied by MESA

The (SF)' mark denoles lhe slandard pan.

Raffle. Part llo. Part llarre E1 Descripticn- Reillo. Part No. Part Name Or Description Remarks
3305-3118 EVQ21405R SW [hfl (GO)
CIRCUIT (S) 5310-313 EVOZMCSR SW Dll'l
EARTH TEPMINAL (5)
E101 SliElUDd-z EARTH TElfilIllrLL ill]
JACK(S)
Jlilfll RITUGEKZI] SYSTEM [M]
[M]
El]
[W]
Ill] Ref. llo. Part No. Part Name 3: Description Rararlm
Ell]
[M1 CABINET PARTS
[M]
[M] l RKHIKOZ-K CABINET [lfl
2 RHDEDUlH-Kl SCREW EM}
IODE(S) 3 XTRSHLIFZ SCREW Drfl
4 M0424 EL HOLDER [IT]
101 55 IODE 5 RYKOWOC-K ROTTlll CABINET ASSY [Ml (REF)
03A dOSZ-H IODE 5 RYKO'IUOF-K BO'lTiM CABINET ASSY DI! (EC)
-305 LllJSDlllPUJAD E, D. 5-1 3H61654 RUBBER DI]
MAIBSTA IODE 6 RYPfl'lilflB-K ' FRONT PANEL ASSY [M] (E, EP)
155291 DIODE . 6 RYPO7SKC-K ERORT PANEL ASS'Y DH (60)
W55 DIODE (H RKWOSOILV FL PMEL [M]
9840515113 D1005 5-2 RGLOSSBO LENS fill (50)
ISSZQITA DIODE 5-3 P3420423 SHEET [M] (60)
65 DIODE .. 7 )(TBSElfBJFZl SCREW [Mi
8 )ClBScRJEZ SCREW [lfl
COIL (S) 9 lil'lJ571024OKK FLAT CABLE (W4OI/10P) [ll]
ll) $705240 FLAT CABLEmVéOZ/SP) [M]
RLMIDDJT-Y COIL
OSCILLATORG)
EFUEC4004T4 OSCILLATOR
DISPLAY TUBE
DISPLAY TUBE
B)
-5lD4 EVQ21405R

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