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Schematic Diagram For Realistic STA-111

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CK-722
Posts: 373
Joined: Sun Dec 16, 2018 3:53 pm

Schematic Diagram For Realistic STA-111

Post by CK-722 » Mon May 13, 2019 8:08 pm

Does anyone have any ideas for finding a schematic for a Realistic STA-111 Receiver? The relay system for preventing the amplifiers from being overloaded from shorts and other impedance mismatch overload is malfunctioning, and no one seems to know where to find them. I've talked to a former Radio Shack franchise owner, radio engineers who started their careers in home Electronics repair, and looked online but no one seems to know where to find them. There's some small illegible ones online, and ones that are close Models but not identical, but no one seems to have full scale schematics. It is a common problem, apparently, the receivers take longer and longer for the relays to operate and let the power to the speakers, and then it asymptotically approaches infinite time and doesn't kick in at all.


Is THAT where they got the idea for the 486-SX?

Same (x, y, z), different (t)

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FET-500
Posts: 214
Joined: Sat Nov 10, 2018 9:22 am

Re: Schematic Diagram For Realistic STA-111

Post by FET-500 » Tue May 14, 2019 7:30 am

Are you certain the electrolytics haven't failed? A old Sansui that I still have, displayed similar behavior and it's issue was power supply caps.



CK-722
Posts: 373
Joined: Sun Dec 16, 2018 3:53 pm

Re: Schematic Diagram For Realistic STA-111

Post by CK-722 » Tue May 14, 2019 5:39 pm

He said they were all right. I have a line on one at the Radio Shack in Charlevoix. Keep looking though.


Is THAT where they got the idea for the 486-SX?

Same (x, y, z), different (t)

Your bullet missed my trial balloon.

RTN Price. Not guaranteed. As of 12:30, 157.71 Down 0.22.

Artificial Intelligence is a Child that needs a Parent to guide it through.

FET-500
Posts: 214
Joined: Sat Nov 10, 2018 9:22 am

Re: Schematic Diagram For Realistic STA-111

Post by FET-500 » Thu May 16, 2019 7:33 am

CK-722 wrote:
Tue May 14, 2019 5:39 pm
He said they were all right. I have a line on one at the Radio Shack in Charlevoix. Keep looking though.
Electrolytics are often the first thing to fail. They don't always show signs of leakage on the board.



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