Technics SUX 840 Service Manual

Page 1

Stereo Integrated Amplifier

SPECIFICATIONS
(DIN 45 500)

I AMPLIFIER SECTION
DIN power output

1k! THD:1°/n 2 X 50W (80)
Total harmonic distortion

rated power at 1 kHz 1% (8f!)

halt power at! kHz 0,009% (80)
Residual hum and noise 0 4 mV
Damping tactor 30 (80)
Input sensitivity and impedance

PHONO 3 mV/47k0

TUNER, CD, AUX, TAPE 1, TAPE 2

200 mV/22kQ
MIC 12 mV/10kfl
Maximum input voltage (1 kHz, RMS)
PHONO 120 mV
MIC 40 mV
S/N (rated power 80)
PHONO 73 dB (IHF. A, 79 dB)

I CONTENTS

LOCATION OF CONTROLS .........
CONNECTION ..................

ACCESSORY ..........
PROTECTION CIRCUITRY ........

BEFORE REPAIR AND ADJUSTMENT . .
DISASSEMBLY INSTRUCTIONS .......
FUNCTION OF IC TERMINALS ......

Technics

TUNER, CD, AUX,TAPE 1, TAPE 2
84 dB (IHF, A 83 dB)
Frequency response
PHONO FIIAA standard Curve
:0 8 (18130 Hz~15 kHz)

TUNER, CD, AUX. TAPE 1, TAPE 2
1O HZ'~5D kHz (*3 dB)

Tone controls

BASS 50 Hz,+10dB.*10dB

TREBLE 20 kHz, no [15,710 dB
Muting 720 (18
Super bass 70 Hz, » i0 dB
Output voltage

TAPE 1. TAPE 2, REC our 200 mV

Channel balance, AUX 250 Hl~6,300 H2 :1 0 d8
Channel separation, AUX 1 kHz 60 dB
Headphones output level and impedance

435 mV/34OQ

ORDER NO. HAD870406269

ervice Manual

Amplifier
S J- X840
Color
(K) . . . .Black Type

Color Areas
(K) [EX] . . .. Continental Europe
(K) [EH] .1 .. Holland
(K) [EB] .... Belgium
(K) [EF] . . France
(K) [EK] .. .. United Kingdom
(K) [EG] .... F.R. Germany
(K) [EW] . . . . Switzerland
(K) [Ei] ..... Italy
(K) [XL] .... Australia
(K) [XA] . . . . Asia, Latin America,

Middle Near East,

Africa & Oceania
(K) [PA] .... East PX.
(K) [PE] .... European Military
(K) [XB] ... . Saudi Arabia

Load impedance
MAIN
SURROUND

I GENERAL

Power consumption

Power supply
For continental Europe AC 50 Hz/GO Hz, 220V
For others

AC 50 HZ/GD HZ, 110V/127V/220V/240V

Dimensions rwaxn)

(14-3/16" >< 4r1/16"><11-13/15)

Weight
Notes:

80460
SH 160

230W

360 X103 X 300 mm

50kg|11lb)

1 Specifications are subject to change Without
notice
Weight and dimenSions are approxrmale

2 Total harmonic dlslortlon Is measured by the
digllal spectrum analyzer (H P 3045 system)

Specifications are subject to change without notice for further

Matsushita Electric Trading Co., Ltd.

P O Box 288, Centrai Osaka Japan

improvement.

Page Page
........ 2 BLOCKDIAGRAM......................7,8
........ 3 RESISTORS & CAPACITORS . . . . . . . . . .. . . . 9,10

3 CIRCUIT BOARDS AND WIRING

3 CONNECTION DIAGRAM ........... 11 ~ 15
. . . . 3 SCHEMATIC DIAGRAM ........... 16 ~ 21

4, 5 REPLACEMENT PARTS LIST . . . . ........ 23,24

5, 6 EXPLODED VIEW ....................... 25,26

Panasonic Tokyo Ottice
Matsushita Electric Trading Co., Ltd,

em Floor. Worid Trade Center Bidg.
No 44, Hamamatsurcho 2-cnome, Miriam.
Tokyo 105, Japan