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Technics SA-500

AM/FM Stereo Receiver (1978-79)

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Technics SA-500


Tuning range: FM, MW

Power output: 55 watts per channel into 8Ω (stereo)

Frequency response: 10Hz to 40kHz

Total harmonic distortion: 0.04%

Damping factor: 32

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

Signal to noise ratio: 78dB (MM), 95dB (line)

Output: 150mV (line)

Speaker load impedance: 4Ω to 16Ω

Dimensions: 486 x 157 x 329mm

Weight: 11.4kg


service manual   English - Ivy Caudieus

instruction/owners manual   English - Ivy Caudieus

quick start guide   English - tpettenati

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Reviewed Nov 25th, 2014 by longmountainman

I just purchased this receiver to replace my ailing Kenwood and WOW. Never knew my vintage Bose 602's could sound like that. 0.04 THD delivers no fuzz even at high volume. Highly recommend for the budget conscious.



re: SA-500

Hi, just wondering IF anyone's had one of these whereby the FM Tuner just stopped working? AM still motoring along.. Just nothing on FM, but Signal Meter says strong.. Would love to fix this!?


re: SA-500

Troubleshooting the FM circuitry for correct B+ voltages, along with doing a general alignment due to aging is in order.
The FM muting circuitry also tends to become unstable due to aging components.
Of course this requires the usual equipment - o-scope, multiplex and rf generators, along with thorough cleaning of rotary switches involved.

re: SA-500

I have a Technics SA-500 receiver that takes up to 10 minutes after turning on for sound to come out of speakers. Is there a circuit that can be easily fixed to solve the problem?

re: SA-500

Me too. Well, not ten minutes. But easily a few minutes. Then it makes a mechanical "tink" sound as (apparently) a contact is closed, and ... great sound. But the startup interval is getting longer and longer. Did you ever get yours figured out?

karodimitrov's picture

re: SA-500

You must check speakers protection.Also check that there are no DC voltage on outputs of both channels.It looks like a bad electrolytic caps, even in the power supply.

re: SA-500

To Whom it May Concern; Is there anyone that may know of a reason that thee unit HUMS loudly? It hums loudly in both channels until you turn up the volume, then, it's less noticeable. My question is; Is there a simple type of fix that I could possibly do (if described in crayon) to fix this . . .

Much appreciated . . .
Don H

re: SA-500

Is the noise same on every source?
Is the noise on low fequency or high frequency?
Is the volume pot. Ok?
The noise could come from previous stage: could be filtering capacitors or ground conection.

Diagram is low res so i can not indicate the component.

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