Technics SU-Z400 - Service Manual

ORDER NO. HAD84062812C8
Service
Manual
Amplifier
Stereo Integrated Amplifier S J on 74 OO
Color
(K).... Black Type
(S).... Silver Type
(K)(S) | [E] .... . Switzerland and
. Scandinavia.
(K)(S) | [EF]... . France
(K)(S) | [Ei] ..... Italy
(K)(S) | [EK] .... United Kingdom
(K)(S) | [EH] ... . Holland
(K)(S) | [EGA] ... F.R. Germany
(K)(S) | [EB] ... . Belgium
(K)(S) | [XL]..... Australia
(K)(S) | [XA] .... Asia, Latin America,
Africa, Middle Near
East and Oceania
(K) [PC] ... . European Audio
Club
SPECIFICATIONS
(DIN 45 500)
@ AMPLIFIER SECTION S/N
1 kHz continuous power output rated power (82)
both channels driven 2 x BOW (82) PHONO 75 dB (IHF, A: 81 dB)
40
Hz~20
kHz
continuous
power
output
TUNER,
CD/VIDEO/AUX,
both
channels
driven
2
x
SOW
(82)
TAPE
1,
2/EXT
86
dB
(IHF,
A:
97
dB)
Total harmonic distortion —26 dB power (8)
rated
power
at
40
Hz~20
kHz
0.02%
(8Q)
PHONO
65
dB
half power at 1 kHz 0.003% (802) TUNER, CD/VIDEO/AUX, TAPE 1, 2/EXT 65 dB
half power at 40 Hz~20 kHz 0.01% (80) 50 mW power (82)
~26 dB power at 1 kHz 0.007% (8) PHONO 63 dB
50 mW power at 1 kHz 0.007% (822) TUNER, CD/VIDEO/AUX, TAPE 1, 2/EXT 64 dB
intermodulation distortion Tone controls
rated
power
at
250
Hz:
8
kHz=4:1,
8
0.02%
BASS
50
Hz,
+10
dBx
—
10
dB
rated
power
at
60
Hz:
7
kHz=4:1,
SMPTE,
80
0.02%
TREBLE
20
kHz,
+10
dB»
—10
dB
Power
bandwidth
Loudness
control
(volume
at
—30
dB)
50
Hz,
+9
dB
both
channels
driven,
—3
dB
10
Hz~25
kHz
(80,
0.02%)
Output
voltage
and
impedance
Residual hum and noise 0.8 mV REC OUT 150 mV
Damping factor 40 (80)
Input sensitivity and impedance @ GENERAL
PHONO 2.5 mV/47kO Power consumption 290W
TUNER, CD/VIDEO/AUX, TAPE 1, 2/EXT 150 mV/22k Power supply
PHONO
maximum
input
voltage
(1
kHz,
RMS)
150
mV
For
United
Kingdom
and
Australia
AC
50
Hz/60HZ,
240V
Channel
balance,
CD/VIDEO/AUX
250
Hz~6,300
Hz
+1
dB
For
continental
Europe
AC
50
Hz/60H
z,
220V
Channel
separation,
CD/VIDEO/AUX
1
kHz
50
dB
For
others
AC
50
Hz/60
Hz,
110V/120V/20V/240V
Headphones
output
level
and
impedance
490
mV/330Q
Dimensions
(W<XHXD)
430
x
86
xX
240
mm
Load
impedance
(16-15/16”
X
3-3/8”
x
B-7/16")
MAIN
or
REMOTE
40~16Q
Weight
9.1
kg
MAIN
and
REMOTE
8QN~160
(1
1.3
Ib.)
Frequency response Note:
PHONO
RIAA
standard
curve
Total
harmonic
distortion
is
measured
by
the
digital
spectrum
+0.8 dB (30 Hz~15 kHz) analyzer (H.P. 3045 system).
TUNER, CD/VIDEO/AUX, TAPE 1, 2/EXT
10 Hz~80 kHz (-—3 dB) (Specifications are subject to change without notice for {yr-ther
improvement.)
Matsushita Electric Trading Co., Ltd.
&
‘Technics
P.O.
Box
288,
Central
OgpKa
Japan

Technics SU-Z400 Specifications

General

Brand	Technics
Model	SU-Z400
Category	Amplifier
Language	English

Summary

Specifications

Amplifier Section

Detailed specifications for the amplifier stage, including power output and distortion.

Signal-to-Noise Ratio (S;N)

Specifies the signal-to-noise ratio for different input sources.

Tone Controls and Output

Details on bass, treble controls, loudness, and output voltage/impedance.

General Specifications

Overall power consumption, power supply, dimensions, and weight.

Safety Precautions

Insulation Resistance Test

Procedure for testing insulation resistance to prevent electric shock hazards.

Control Panel Layout and Functions

Power, Input, and Tape Controls

Details on power switch, input selectors, and tape monitor functions.

Listening Adjustment Controls

Operation of volume, tone, balance, and loudness controls.

Speaker and Output Selections

Managing speaker outputs and headphone connection.

Protection Circuitry

Pre-Repair and Adjustment Procedures

Speaker Impedance Selection

Disassembly Instructions

Cabinet and Power Switch Removal

Procedures for removing the outer cabinet and power switch assembly.

Front Panel and Indicator Plate Removal

Steps for detaching the front panel, indicator, and ornament plates.

Power IC Removal

Detailed steps for accessing and removing the power integrated circuit.

Component Terminal Identification

Circuit Board and Wiring Diagrams

Muting and Relay Drive IC Description

Block Diagram Overview

A high-level block diagram illustrating the IC's function within the system.

Power Supply Voltage Variations

Schematic Diagram

Replacement Parts List

Exploded Views