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SAE schematic
SAE schematic
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Old 11th March 2008, 03:04 PM   #21
worldcitizen is offline worldcitizen  United States
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Default schematic for SAE A502

Burned fingers, I cannot email anateck because I am a new member and am still under "moderation". If you could send me the schematics at mike@catduncanelectronics.net (remove the word cat from my email address to use it) I would appreciate it. Thanks in advance. If the schematic you have is the same as the one linked to by ACD then I have just downloaded that one. If you have a better one I would love to get it. And by the way, thanks ACD for the link. I really, really do apprecite the help. Thanks guys.
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Old 12th March 2008, 10:24 PM   #22
Burnedfingers is offline Burnedfingers  United States
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I have the same schematic as ACD.

What is the problem with the amplifier?
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Old 22nd June 2018, 04:34 PM   #23
Burnedfingers is offline Burnedfingers  United States
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Retired now so I am finally getting around to taking the A502 apart and cannot find my schematic maybe a result of killing off several computers.

So the hundred dollar question is "Does anyone still have a copy to share?"

Willing to purchase if necessary. A service manual would also be nice if anyone has one.

Anything would be appreciated as I have a unit that may be struck by technician.
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Old 23rd June 2018, 06:42 AM   #24
Jan Dupont is offline Jan Dupont  Denmark
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The schematic is the best I can provide....
Still looking for the SM
Attached Files
File Type: pdf SAE-A502-pwr-sch_2.pdf (953.7 KB, 126 views)
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Old 23rd June 2018, 11:01 AM   #25
Burnedfingers is offline Burnedfingers  United States
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A hearty thank you to everyone. I have the SAE spread across my bench. In my opinion its going to be a fun considering the workmanship of someone before me. Ugggg sloppy soldering and some torn pads it will be fun.
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Old 23rd June 2018, 11:10 AM   #26
KatieandDad is offline KatieandDad  United Kingdom
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The schematics are available at HiFi Engine - Owners and Service Manuals
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Old 23rd June 2018, 11:24 AM   #27
Burnedfingers is offline Burnedfingers  United States
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HiFi engine doesn't have a service manual for the SAE A502 just an owners manual. I already have a schematic just need some info on bias setting, capacitor values and such.
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Old 23rd June 2018, 01:15 PM   #28
anatech is offline anatech  Canada
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SAE schematic
I hear you Joe. I'm working on something that was "recapped" right now. Ugly soldering job and the iron appear to have been a touch too cool for the job. That and they used the wrong capacitor types in many areas. They even bypassed some capacitors with nice film types. Too bad that doesn't make any difference in performance, someone paid to have this work performed.

If it wasn't mine, there is rather too much work to have properly redone for the original owner. Especially having already paid someone for what I am doing now. The unit in question is a nice Heathkit AD-1702 electronic crossover.

Are you seeing something similar Joe?

-Chris
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Old 24th June 2018, 02:03 PM   #29
Burnedfingers is offline Burnedfingers  United States
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Hi Chris,

Yes, its been abused. Its too bad that people try to work on boards without the proper equipment. If a desoldering station had been used there would be no damage to the pads. Too many times people even skilled people try to desolder with an iron that is way too big for the job and without the correct tip. Desoldering braid can and usually causes damage to the board. Then there is all that left over flux that needs to be cleaned up.

This one will take time to try to repair the "repair" work from a "repair shop." I would have gotten rid of a technician that left a mess like this one in a customers amp.

I'm still trying to see the cap values on the schematic. My eyes aren't what they used to be. Some of them I can see the value but not the cap numbers.
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Old 24th June 2018, 03:44 PM   #30
anatech is offline anatech  Canada
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SAE schematic
Hi Joe,
I commonly see the same things you are. It's a life.

-Chris
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