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Technics SE-A7

Technics SE-A7
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Technics SE-A7 Specifications

General IconGeneral
TypeStereo Power Amplifier
Output Power100 W (8 Ohms)
Frequency Response5 Hz - 100 kHz
Total Harmonic Distortion (THD)0.003%
Input Sensitivity1.0 V
Input Impedance47 kOhms
Dimensions420 x 140 x 350 mm
Weight12 kg
Damping factorgreater than 1000
Speaker load impedance4 to 16 ohms

Summary

Specifications

AMPLIFIER SECTION

Details power output, distortion, and frequency response for amplifier section.

PROTECTION CIRCUITRY

TECHNICAL GUIDES

1. SPEAKER IMPEDANCE DETECTION CIRCUIT

Circuit to detect speaker impedance for optimal operation and voltage matching.

3. BLOCK DIAGRAM OF BTL OPERATION (MONO)

Diagram illustrating mono BTL operation mode and its circuitry.

DISASSEMBLY INSTRUCTIONS

BEFORE REPAIR AND ADJUSTMENT

ADJUSTMENT POINTS

1. Load impedance detection and idling current of power transistor (ICQ)

Adjustments for load impedance detection and transistor idling current.

2. Fluorescent peak power meter

Calibration and adjustment of the FL peak power meter display.

3. Check points

Key checkpoints for verification after adjustments or repairs.

BLOCK DIAGRAM

CIRCUIT BOARDS AND WIRING CONNECTION DIAGRAM

SCHEMATIC DIAGRAM

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