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Pioneer SA-7700 Service Manual

Pioneer SA-7700
43 pages
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Pioneer SA-7700 Specifications

General IconGeneral
Power Output40 watts per channel into 8Ω (stereo)
Total Harmonic Distortion0.1%
Frequency Response10 Hz to 50 kHz
Damping Factor30
Input Sensitivity2.5mV (MM), 150mV (line)
Channel Separation50dB (MM), 55dB (line)
Dimensions430 x 138 x 341mm
Weight10.3kg
Speaker load impedance4Ω to 16Ω
TypeStereo Integrated Amplifier
Semiconductors18 x diodes

Summary

Specifications

Semiconductors

Lists semiconductor components used in the amplifier.

Amplifier Section

Details the amplifier's technical performance and audio characteristics.

Miscellaneous Specifications

Specifies electrical requirements, physical size, and weight of the unit.

Furnished Parts

Lists items included with the product.

Audio Features

Covers Loudness Contour and Hum/Noise specifications.

Connection Diagram

Front Panel Facilities

Front Panel Controls

Explains primary controls for audio adjustment and source selection.

Front Panel Indicators

Describes visual output level and clipping indicators.

Power and Output Selections

Details power supply and speaker output selection features.

Circuit Descriptions

Phono Circuit

Explains the phono preamplifier and its interference filter.

Power Amplifier Circuit

Details the design of the main audio amplification stage.

Output Meter Drive Circuit

Describes the circuit that drives the power output meters.

Peak Indicator Circuit

Explains the circuit for the peak clipping indicator LED.

Protection Circuit

Details the circuit protecting speakers and amplifier from faults.

Power Supply Circuit

Explains the power supply system providing voltages to the unit.

Disassembly Procedures

Top Cover Removal

Instructions for removing the top enclosure panels.

Bottom Plate Removal

Steps for accessing the unit from the bottom.

Front Panel Removal

Procedure for removing the front control panel.

Heat Sink and Meter Lamp Service

Procedures for removing heat sink and replacing meter lamp.

Parts Location and Identification

Front Panel Parts

Identifies components visible on the front panel.

Internal Parts Views

Identifies internal components from top and rear views.

Adjustments

Idle Current Adjustment

Procedure for setting the amplifier's quiescent current.

Output Meter Calibration

Procedure for calibrating the power output meters.

Exploded View

Diagrams and Parts Lists

Main Schematic Diagram

The complete circuit diagram for the amplifier.

Miscellaneous Parts List

Lists various components and their part numbers.

Assembly Schematics and Parts

Diagrams and lists for Terminal, AF, Tone, RFI, and VR assemblies.

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