Solved: vintage pioneer receiver SX1010

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sslome

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This receiver has A,B, and C speakers. only two of them work. any advice?
 

cwwozniak

Chuck
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Hi sslome, and welcome to TSG,

A quick look at the schematic diagrams for the SX1010 seems to show some type deliberate electrical interlocking of the speaker switches to permit only two sets of speakers to be enabled at any one time.
 

cwwozniak

Chuck
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Now it looks like you can have 3 set of speakers.

instruction/owners manual

service manual
FYI, Both links result in:
System Message

The file appears to have been called from an unauthorized website.


Only links called directly from pages on the Vinyl Engine or HiFi Engine websites can be processed. If you have received this message after following a link from one of these sites, please report the problem in the download section of the forum.
The SX-1010 does have three sets of speaker outputs. However, the speaker select push buttons are wired such that not all three can be selected at the same time.

EDIT:
I am attaching a section of the SX-1010's schematic diagram, showing the speaker switch wiring. I color coded some of the signal paths. The only way to get signal to any of the speakers is if at least one of the speaker selectors switches is in the "Off" position.
 

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Thanks Chuck.

I thought the links would work but forgot to delete the cookies.

I joined the site to get to things.
 

sslome

Thread Starter
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Mar 18, 2015
Messages
3
Thanks, I needed to know if it was a problem because I am going to be selling the unit soon.
 
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