Technics SADX 750 Service Manual

Page 2

half power at 1 kHz

Power output at 1 kHz each channel driven
DIN 1 kHz (T.H.D. 1%)

Front

Center

Surround

Power bandwidth

both channels driven, -3 dB
Damping factor

Load impedance

From

Center

Surround

Frequency response

CD, TAPE/MD, DVD, TV, VCR
Input sensitivity and impedance
CD, TAPE/MD. DVD. TV. VCR
SIN at rated power (6 0)

CD, TAPE/MD, DVD, TV, VCR
Tone controls

BASS

TREBLE

Output voltage

TAPBMD REC (OUT), VCR OUT

0.07% (5 o)

nmwwm
mwpm
umwwm

10 Hz-40 kHz (6 o)
30 (60)

6-16 9

6-16 9

6-16 9

10 Hz-4o kHz, 13 dB
200 mV/22 k!)

75 dB (IHF, A: 85 dB)

50 HZ, +10 to -10 dB
20 kHz, +10 to -10 dB

200 mV

Channel balance (250 Hz-6.3 kHz)
Channel separation

Headphones output level and
impedance

Subwoofer frequency response (-6 dB)
Digital input

Optical

Coaxicial

in General

Power supply

For Continental Europe

For the United Kingdom

Power consumption

Dimensions (W x H x D)

Mass

Power consumption in standby mode:
Notes:

:1 dB
55 dB
430 mV/33O 0

7-200 Hz

AC 230 V, 50 Hz

AC 230-240 V, 50 Hz
220 W

430 X 158 X 375 mm
9.3 kg

2 W

1. Specifications are subject to change without notice.

Mass and dimensions are approximate.

2. Total harmonic distortion is measured by the digital spectrum

analyzer.

Manufactured under license from Dolby Laboratories. Dolby", Pro
Logic" and the double-D symbol are trademarks of Dolby Laboratories.
** Manufactured under license from Digital Theater System. DTS"
and DTS Digital Surround" are trademarks of Digital Theater System.

A WARNING

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 protessional 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.

CONTENTS

Page Page

1 Before Repair and Adjustment ----------------------------------------------- 3 7 Block Diagram ...................................................................... 12
2 Protection Circuitry ----------------------------------------------------------------- 3 8 Schematic Diagram --------------------------------------------------------------- 18
3 AccessorieS" --------------------------------------------------------------- 3 9 Printed Circuit Board ------------------------------------------------------------ 31
4 Caution of AC Mains Lead ------------------------------------------------------ 4 to Wiring Connection Diagram ---------------
5 Front Panel Controls -------------------------------------------------------------- 5 11 Type Illustrations of le, Transistors & modes-
6 Disassembly and Main Component Replacement Procedures 12 Terminal Functions of ms .....................

------------------------------------------------------------------------------------------------ 7 13 Parts Location and Replacement Parts List-12