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Pioneer SA-8800 Service Manual

Pioneer SA-8800
44 pages
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STEREO
AMPLIFIER
SA-8s00,
Original
YQ
PIONEER’
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Pioneer SA-8800 Specifications

General IconGeneral
Power Output60 watts per channel into 8Ω (stereo)
Frequency Response5Hz to 100kHz
Damping Factor60
Input Sensitivity MM2.5mV
Input Sensitivity Line150mV
Signal to Noise Ratio MM80dB
Signal to Noise Ratio Line100dB
Speaker Load Impedance4Ω to 16Ω
Dimensions420 x 150 x 376mm

Summary

Pioneer SA-8800 Specifications

Pioneer SA-8800 Front Panel Controls

Power Switch

Controls power supply and indicates amplifier status.

Power Indicator

Lamp indicating amplifier power status.

Speaker Selector

Selects speaker output systems (A, B, A+B).

Tape Monitor Indicator

Indicates tape monitoring function status.

Power Meter

Displays the rated power level on the fluorescent tube.

Function Indicators

Lights up according to the selected function source.

Subsonic Filter Switch

Attenuates frequencies lower than 15Hz.

High Filter Switch

Attenuates frequencies higher than 8kHz.

Volume Control

Adjusts the output level to speakers and headphones.

Tape Duplicate Switch

Used for duplicating or editing recorded tapes.

Tape Monitor Switch

Selects the program source for reproduction.

Function Selector

Selects the program source (PHONO, TUNER, AUX).

Headphone Jack

Jack for connecting stereo headphones.

Bass and Treble Controls

Adjusts bass and treble frequencies for sound output.

Tone Switch

Engages or disengages tone control circuits.

Balance Control

Balances the volume of left and right channels.

Loudness Switch

Accentuates bass and treble at low volume levels.

Muting Switch

Attenuates audio output by 20dB.

Mode Selector

Selects stereo, mono, or reversed stereo reproduction.

Cartridge Load Selectors

Selects input resistance and capacitance for phono cartridges.

Pioneer SA-8800 Rear Panel Facilities

Phono Interference Filter Switch

Attenuates radio-frequency interference during record play.

Phono 1 Jacks

Connects the first turntable's output cords.

Phono 2 Jacks

Connects the second turntable's output cords.

Tuner Jacks

Connects the tuner's output cords.

Aux Jacks

Auxiliary input jacks for various audio sources.

Preamplifier/Power Amplifier Connector Bar

Allows separation of pre-amp and power amp sections.

Speakers Terminals A

Connects the first pair of speakers.

Speakers Terminals B

Connects the second pair of speakers.

GND Terminals

Connects the ground wire of turntables, etc.

Tape 1 Jacks

Connects the first tape deck for input/output.

Tape 2 Jacks

Connects the second tape deck for input/output.

AC Outlets

Spare power outlets, switched and unswitched.

Pioneer SA-8800 Block Diagram

Pioneer SA-8800 Circuit Descriptions

Pre-Amplifier Section

Details cartridge load selection and phono interference filter.

EQ Amplifier and Tone Controls

Describes the equalization and tone adjustment circuits.

Power Amplifier Section

Explains amplifier circuit, power limiter, and NSA circuit.

Power Limiter

High-speed protection circuit for power transistors.

NSA (Non-Switching Amplifier) Circuit

Prevents switching distortion and reduces heat loss.

Indicator Circuit

Details the fluorescent indicator tube drive circuit.

Protection Circuit

Protects speakers from DC voltage and transient operations.

Pioneer SA-8800 Disassembly Guide

Wooden Cover Removal

Instructions for removing the outer wooden cover.

Bottom Plate Removal

Steps to detach the bottom plate of the unit.

Front Panel Removal

Procedure for removing the front panel assembly.

Pioneer SA-8800 Parts Location

Front Panel View

Identifies controls and components on the front panel.

Front View with Panel Removed

Shows components visible after removing the front panel.

Top and Bottom Internal Views

Diagrams showing component locations from top and bottom.

Pioneer SA-8800 Packing Instructions

Pioneer SA-8800 Adjustments

Power Amplifier Adjustments

Procedures for adjusting DC balance and idle current.

Output Power Indicator Calibration

Steps to calibrate the power output indicator.

Pioneer SA-8800 Exploded View

Pioneer SA-8800 Schematics and Parts List

Miscellaneous Parts

Lists various components like capacitors, semiconductors, and switches.

Schematic Diagram

Detailed circuit diagrams for the SA-8800 amplifier.

P.C. Board Assemblies

Identifies and lists parts for various P.C. boards.

Terminal Assembly (GWX-242)

Diagram and parts list for the terminal assembly.

Switch Assembly (AWS-134)

Diagram and parts list for the switch assembly.

EQ Assembly (GWF-113)

Schematic and parts list for the equalizer assembly.

Filter Assembly (GWS-164)

Schematic and parts list for the filter assembly.

TC Assembly (GWG-122)

Schematic and parts list for the tone control assembly.

VR Assembly (GWX-243)

Diagram and parts list for the variable resistor assembly.

PA Assembly (GWH-115)

Schematic and parts list for the power amplifier assembly.

Power Supply Assembly (AWR-182)

Schematic and parts list for the power supply assembly.

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