Technics SHEH 750 Service Manual

Page 1

ORDER NO. AD990306102

Service Manual

Sound Processor

un-

PRO-LOGIC

Remote Control .
Transmitter

Sound Processor

SH-EH750

Colour
(8) ........ Silver Type
* SB-Ps75 * SB-PS75
Area
(E) ........ Europe.
System SC-EH750
SB'PC75 Sound Processor SH-EH750
- Tuner/Amplifier SA-EH750
* CD Changer SL-EH7SO
SB-EH750 HS-EH750 SA-EH750 SB-EHTSO Cassette Deck RS-EH750
Front Speakers" SB-EH750
. it .
Because of unique interconnectlng cables, when a component Center Speaker * SB P075
requires service, send or bring in the entire system. surround Speakers $343575

>l< : Made in Singapore.

Specifications

EQ/SFP Section

MANUAL GEO:
Center frequency;
Level control;

E0 SPACE mode:

100 HZ, 315 HZ,1 kHZ, 3.15 kHz, 10 kHz
1: 3, 6, 9 dB

3 modes; HEAVY, CLEAR, HALL
3D Acoustic Image E0:
3 modes; Al EQ, 3D Ai1.3D A|2

Pro-amplifier Section
Input sensitivity/impedance:

vcn (EXT); 250 mV/15 kn

AUX (DVD); 250 mV/15 kll

DVD SCH INPUT (LlR/LSIRLICISubW); 250 mV/15 k!)
Output level:

VCR REC OUT; 250 mV/1.5 kil

SUBWOOFER OUT: 2.5 V/2.2 kit
DOLBY PRO LOGIC Section
PRO LOGIC mode: SURROUND
CENTER mode: NORMAL
DELAY TIME: 20 ms (Fixed)
AV SURROUND Section

SIMULATED STEREO
SUPER SURROUND (MUSIC. MOVIE)

AV SURROUND mode:

DSP CONTROL Section
DSP CONTROL mode: SEAT POSITION

CENTER FOCUS
VIRTUAL REAR SURROUND

MULTI REAR SURROUND

Spectrum Analizer Section

Display mode: NORMAL, PEAKHOLD. AURORA
General

Dimensions (WxHxD): 293x89x269 mm
Weight: 1.5 kg

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

Manufactured under license from Dolby Laboratories Licensing
Corporation.
i DOLBY, the double-D symbol DD and "PRO LOGIC" are trademarks
l cl Dolby Laboratories Licensing Corporation

A WARNING
This service information is de5igned 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.

Technicsi

©1999 Matsushita Electric Industrial 00., Ltd.
All rights reserved. Unauthorized copying and
distribution is a violation of law.

Page 2

SH-EH750

I Contents

Location oi Controls ............................................................................ 2
Operation Checks and

Component Replacement Procedures
Schematic Diagram ................
Printed Circuit Board Diagram
Type illustration oi IC's, Transistors and Diodes

Page

NOTE:

Wiring Connection Diagram .
Terminal Function 01 We
Block Diagram .
Replacement Parts List .
Cabinet Parts Location ..

Reier to the service manual for Model No. SA-EH750 (ORDER No. AD9903063C2) tor Information on "Accessories,

"Connections", "Installation", Operations and "Packaging.

l Location of Controls

(13) Display mode select button (DISPLAY MODE)

@ Display

@ SD Al E0 button (3D Al E0)

@ Jog control and icy stick (MULTI JOG)

@ DOLBY PRO LOGIC on/oif button
(DU PRO LOGIC, OFF/ON)

@ Super surround button and indicator
(SUPER SURROUND)

® Simulated stereo onlot't button and Indicator
(SIMULATED STEREO)

@ Center focus button and indicator (CENTER FOCUS)

53 Virtual rear surround button and indicator
(VIRTUAL REAR SURROUND)

62 Multi rear surround button and indicator
(MULTI REAR SURROUND)

(5} Seat position button and indicator
(SEAT POSITION)