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Technics SU-CH700 Service Manual

Technics SU-CH700
23 pages
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ORDER
NO.
AD9202022C8
Service
Manual
Power
Amplifier
~~
$8
cH700
eae
Amplifier
sci
SU-CH700
SL-CH700
Colour
(K)
Gi
ose
ax
sine
Black
Type
Areas
Suffix
for
Model
No.
Area
Colour
Continental
Europe.
(EB)
Great
Britain.
(EG)
Germany
and
Italy.
(kK)
Because
of
unique
interconnecting
cables,
when
a
component
requires
service,
send
or
5
Asia,
Latin
America,
(GC)
Middle
Near
East
and
Africa.
(GN)
Oceania.
bring
in
the
entire
system.
m@
SPECIFICATIONS
m
POWER
AMPLIFIER
SECTION
System:
SC-CH700
Power
output
Front+Surround:
DIN
1
KHz
THD
1%
60,
2x40
W
Total
Harmonic
distortion
Half
power
at
1
kHz:
0.09%
(6Q)
Impedance
Front:
60
Surround:
80
@
PRE
AMPLIFIER
SECTION
Input
sensitivity/Impedance
Front:
200
mV/47
kQ
Mic:
0.7
mMV/12kQ
Loudness:
5
dB
(60
Hz)/for
volume
position
—30
dB
@
GENERAL
Power
consumption:
250
W
(SYSTEM)
Power
supply
For
Great
Britain
and
Oceania:
AC
50/60
Hz,
230~240
V
For
Germany,
Italy
and
Continental
Europe:
AC
50/60
Hz,
230
V
For
others:
AC
50/60
Hz,
110
V/127
V/220 V/240
V
Dimensions
(WXHxXD):
215x110x346
mm
Weight:
5.1
kg
Notes:
1.
Specifications
are
subject
to
change
without
notice.
2.
Weight
and
dimensions
shown
are
approximate.
3.
Total
harmonic
distortion
is
measured
by
the
digital
spectrum
analyzer.
System
Tuner/CD
piayer
Power
Amplifier
|
Cassette
Deck
Speakers
Sc-CH700
SL-CH700
SH-CH700
SU-CH700
RS-CH700
*SB-CH700
-(E),
(EB),
(EG)
areas...Made
in
PAES
‘Technics
Question and Answer IconNeed help?

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Technics SU-CH700 Specifications

General IconGeneral
Frequency Response3 Hz to 80 kHz (+0 dB, -3 dB)
Total Harmonic Distortion0.1% (20Hz-20kHz, 8Ω, 50W)
Dimensions270 x 119 x 335 mm
Weight6.6 kg
Input sensitivity200 mV
TypeStereo Integrated Amplifier
OutputSpeakers

Summary

Specifications Overview

Power Amplifier Section Details

Details power output and distortion characteristics of the power amplifier.

Pre Amplifier Section Details

Covers input sensitivity, impedance, and loudness features of the pre-amplifier.

General Unit Specifications

Outlines power consumption, supply voltage, dimensions, and weight of the unit.

Before Repair Procedures

Protection Circuitry Explanation

Explains the function of protection circuitry and troubleshooting steps.

Included Accessories List

Lists all included accessories with part numbers and quantities.

System Connections Guide

External Unit Connection Methods

Illustrates connections for video decks, players, DAT, TV, and speakers.

Flat Cable Connection Procedures

Explains how to connect and disconnect flat cables between system components.

Control Panel Overview

Setting the Unit's Clock

Step-by-step guide for setting the unit's internal clock accurately.

Disassembly Instructions - Part 1

Cabinet Removal Steps

Instructions for removing the main unit cabinet.

Front Panel Assembly Removal

Guide to removing the front panel assembly.

FL PCB Removal Procedure

Steps to remove the Front Light (FL) Printed Circuit Board.

Mic and Headphones Jack PCB Removal

Procedure for removing the Mic and Headphone Jack PCBs.

Operation PCB Removal Steps

Instructions for removing the Operation Printed Circuit Board.

Disassembly Instructions - Part 2

Rear Grill Assembly Removal

Steps to remove the rear grill assembly.

AC Input and Output PCB Removal

Guide to removing AC input and input/output terminal PCBs.

PCB Support and Power Transformer Removal

Instructions for removing PCB support and power transformer units.

Disassembly Instructions - Part 3

Fan and Main PCB Removal

Steps for removing the fan and the main Printed Circuit Board.

Power IC and Regulator Transistor Removal

Instructions for removing power IC and regulator transistors.

Main PCB Checking Procedure

Guidance on checking the main Printed Circuit Board after installation.

Fan Motor Removal and Safety Notes

Fan Motor Disassembly Steps

Detailed steps for removing the fan motor assembly.

Important Safety Notices

Critical safety warnings regarding static electricity and component handling.

Schematic Diagram - Operation, FL, and Jacks

FL Circuit Schematic

Detailed schematic of the Front Light (FL) display circuitry.

Operation Circuit Schematic

Schematic of the unit's operation circuitry, including input selection and controls.

Headphone Jack Circuit Schematic

Circuit diagram for the headphone jack interface.

Mic Jack Circuit Schematic

Schematic of the microphone input jack circuitry.

Schematic Diagram - Input/Output & Main

Input/Output Terminal PCB Schematic

Schematic of the input/output terminal Printed Circuit Board.

Main Circuit Schematic

Detailed circuit diagram of the unit's main amplifier section.

Circuit Diagrams - Power and AC Terminal

Main Circuit Schematic Continuation

Continuation of the main amplifier circuit schematic.

Power Transformer Circuit Schematics

Diagrams for power transformer (A) and (B) circuits.

AC Terminal Circuit Schematic

Schematic for the AC input terminal connection.

Printed Circuit Board Layouts

FL PCB Layout Diagram

Layout of the Front Light (FL) Printed Circuit Board.

Operation PCB Layout Diagram

Layout of the Operation Printed Circuit Board.

Headphone and Mic Jack PCB Layouts

Layouts for Headphone and Mic Jack Printed Circuit Boards.

Input/Output Terminal PCB Layout

Layout of the Input/Output Terminal Printed Circuit Board.

Main PCB Layout Diagram

Layout of the Main Printed Circuit Board.

Component Terminal Guides and Circuits

IC, Transistor, and Diode Terminal Guide

Reference guide for terminal pinouts of various ICs, transistors, and diodes.

AC and Power Transformer Circuit Diagrams

Schematics for AC input terminal and power transformer PCBs.

Wiring Connection Diagram

FL Panel Description

FL Panel Grid Assignment

Maps grid positions to functions displayed on the FL panel.

FL Panel Pin Connections

Lists pin numbers and their corresponding connections for the FL panel.

FL Panel Anode Connections

Shows anode connection details for various FL panel segments.

System Block Diagram

System Functional Blocks Overview

Illustrates functional blocks like buffer amp, bass amp, power amp, and system control.

IC Terminal Functions

IC601 Terminal Details

Pin-by-pin breakdown of IC601's functions and signal assignments.

Replacement Parts List - Integrated Circuits

Transistors List

List of all transistors used in the unit.

Diodes List

List of all diodes used in the unit.

Other Components List

Lists fuses, oscillators, transformers, and display tubes.

Component Values and Remarks - Resistors

Resistor Specifications

Table of resistors with part numbers, values, and wattage.

Capacitor Specifications

Table of capacitors with part numbers, values, and voltage ratings.

Component Listings - Switches and Connectors

Switch Components Details

Details of all switches, including their type and function.

Connectors and Jacks Listings

Listing of various connectors and jack types used in the system.

Capacitor Specifications Details

Small Capacitors List

List of capacitors with smaller capacitance values and voltage ratings.

Large Capacitors List

List of capacitors with larger capacitance values and voltage ratings.

Cabinet Parts Location Diagram

Chassis and Component Placement Visuals

Visual guide showing where major internal and external parts are situated.

Accessories and Packing Materials

Included Accessories Catalog

Catalog of all accessories provided with the unit, including cables, adapters, and antennas.

Packing Materials Information

Details of packing materials used for system components.

Packaging Instructions

System Component Packaging Guide

Visual guide for packing individual system units and accessories.

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