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Pioneer SX-408

AM/FM Stereo Receiver

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Pioneer SX-408


Tuning range: FM, MW

Power output: 15 watts per channel into 8Ω (stereo)

Frequency response: 20Hz to 20kHz

Input sensitivity: 2.5mV (MM), 150mV (line)

Speaker load impedance: 8Ω (minimum)

Year: 1980


schematic   English - bobichen

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Reviewed Dec 22nd, 2014 by ducar

The Pioneer SX-408 is a receiver honest and safe value.

Reviewed Apr 08th, 2014 by blacktopspirit

Solid well built low/mid range unit.



re: SX-408

Excellent receiver , not very powerful but sufficient amplification.
Good definition sound quite defined.
The radio section above average.
The phono Stage is of very good quality .
Enjoying uk source speakers.

re: SX-408

I have just finished cleaning all the pots on my SX-408 and now my left channel doesn't work :(

I'm not good at reading schematics but I can replace circuitry if needed, does any one know where I should start?

karodimitrov's picture

re: SX-408

Always start with fuses.Check and If necessary-replace them. Then you have two identical amplifiers-for left and right channels.If the right works-it will be your benchmark.Now-step by step you can compare voltages between the same points of
the left and right channel.Right works-this means all voltages are OK.The reason is a circuit in left one.Find it by measuring the voltages, and when you find a different voltage-somewhere around is your problem.
Hope come in handy.

karodimitrov's picture

re: SX-408

You're welkome...:)

re: SX-408

Great help, Thank you!

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