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Technics SE-A5MK2 Service Manual

Technics SE-A5MK2
26 pages
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Technics SE-A5MK2 Specifications

General IconGeneral
BrandTechnics
ModelSE-A5MK2
CategoryAmplifier
LanguageEnglish

Summary

SPECIFICATIONS

AMPLIFIER SECTION

Detailed technical specifications for the amplifier's performance parameters.

GENERAL

Overall product specifications including power, dimensions, and weight.

BEFORE REPAIR AND ADJUSTMENT

LOCATION OF CONTROLS

REAR PANEL CONTROLS AND CONNECTORS

Description of input/output terminals and selectors on the rear panel.

FRONT PANEL CONTROLS AND INDICATORS

Identification and function of controls and indicators on the front panel.

SAFETY PRECAUTIONS

INSULATION RESISTANCE TEST

Procedure for testing insulation resistance to prevent electrical shock hazards.

PROTECTION CIRCUITRY

DISASSEMBLY INSTRUCTIONS

HOW TO REMOVE THE CABINET

Step-by-step guide for safely removing the main unit cabinet.

HOW TO REMOVE THE FRONT PANEL

Procedure for detaching the front panel assembly from the chassis.

HOW TO REMOVE THE BOTTOM BOARD

Instructions for removing the bottom board assembly from the unit.

HOW TO REMOVE THE PEAK POWER METER

Steps to safely detach and remove the peak power meter assembly.

HOW TO REMOVE THE POWER TRANSISTOR

Detailed procedure for removing the power output transistors from the heatsink.

MEASUREMENTS AND ADJUSTMENTS

IDLING (ICQ) ADJUSTMENT

Procedure for setting the quiescent current (ICQ) for optimal performance.

PEAK POWER METER LEVEL ADJUSTMENT

Steps to calibrate the peak power meter for accurate readings.

RESISTORS & CAPACITORS

RESISTOR SPECIFICATIONS

List of resistor types, values, wattage, and tolerances.

CAPACITOR SPECIFICATIONS

List of capacitor types, values, voltage, and tolerances.

PRINTED CIRCUIT BOARDS LAYOUTS

PEAK POWER METER P.C.B.

Diagram showing component placement on the Peak Power Meter PCB.

SIGNAL DET./DC DET./ICQ CONTROL P.C.B.

Component layout for the Signal Detection and ICQ Control PCB.

HEADPHONES TERMINAL P.C.B.

Diagram of component placement on the Headphones Terminal PCB.

CURRENT DET./METER DRIVE/POWER SUPPLY P.C.B.

Component layout for the Power Supply and Meter Drive PCB.

SYNCHRO BIAS/ICQ CONTROL/POWER AMP/POWER SUPPLY P.C.B.

Component layout for the Power Amp and ICQ Control PCB.

DIFFERENTIAL AMP/PRE DRIVE AMP. P.C.B.

Component layout for the Differential Amp and Pre-Drive Amplifier PCB.

INPUT SELECTOR P.C.B.

Component layout for the Input Selector PCB.

SPEAKERS SELECTOR P.C.B.

Component layout for the Speaker Selector PCB.

SPEAKER TERMINAL P.C.B.

Component layout for the Speaker Terminal PCB.

CIRCUIT BOARDS AND WIRING CONNECTION DIAGRAM

TERMINAL NAMES AND FUNCTION OF ICQ CONTROL

Detailed functions of ICQ control terminals and their signal descriptions.

BLOCK DIAGRAM

ICQ CONTROL CIRCUIT DESCRIPTIONS

SIGNAL AND TEMPERATURE DETECTION

Explains how signal and temperature affect ICQ control.

OVERLOAD DETECTION CIRCUIT

Details the overload detection mechanism and its impact on ICQ.

CURRENT DETECTION TYPE VOLTAGE CONTROL CIRCUIT

Explains voltage control based on current detection for power transistors.

SCHEMATIC DIAGRAM

REPLACEMENT PARTS LIST

EXPLODED VIEWS

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