Pioneer SX-626 Series User Manual

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Pioneer SX-626 Series Specifications

General

Power Output	27 watts per channel into 8Ω (stereo)
Frequency Response	20Hz to 20kHz
Total Harmonic Distortion	0.8%
Signal to Noise Ratio	70dB (MM), 90dB (line)
Tuning Range	FM, MW
Speaker Load Impedance	4Ω to 16Ω
Year	1972
Channel Separation	45dB
Semiconductors	Transistors

Summary

Input and Control Sections

Input Selector and Speaker Controls

Configures input sources and speaker outputs.

Antenna and Tuner Unit Connections

Details antenna input and FM/AM tuner unit interface.

Power Supply Circuitry

Outlines power supply connections and fuses.

FM Front End Unit (AWB-009)

FM Front End RF and OSC Stages

Covers RF amplification and oscillator circuits in the FM front end.

FM Front End IF Output

Details the intermediate frequency output stage.

R-Unit (AWX-007)

R-Unit Input Resistance Network

Describes the resistance network for input signals.

Power Supply Unit (AWR-006)

Power Supply Voltage Regulation

Details voltage regulation and filtering components.

FM/AM Tuner Unit (AWE-011)

FM/AM Tuner RF and Mixer Stages

Covers RF amplification and mixing in the tuner.

FM/AM Tuner IF and Detector Stages

Details IF amplification and signal detection.

FM/AM Tuner MPX and Meter Circuits

Describes multiplex and signal meter circuitry.

Head Amp Unit (W21-004)

Head Amp Input and Tone Control

Covers input amplification and tone control circuits.

Head Amp Loudness and Output

Details loudness function and output stages.

Control Amp Unit (AWG-008)

Control Amp Input Selection and Filtering

Details input selection and filter circuits.

Control Amp Volume and Balance

Describes volume and balance control circuits.

Switch Units (AWS-014, AWS-013)

Switch Unit Tape Monitor and Loudness

Covers tape monitor and loudness switching functions.

Switch Unit Filter and Muting

Details filter and muting operations.

Main Amp Unit (AWH-002)

Main Amp Pre-Amplifier Stages

Describes initial amplification circuits.

Main Amp Power Amplifier Stages

Details the final power amplification stages.

Main Amp Output Protection

Covers output protection and bias circuits.