Download ASTRON RMA RMM RSA RSM V 25A POWER SUPPLY service manual & repair info for electronics experts. Download ASTRON RS35M service manual & repair info for electronics experts. ” TIP CAS. I ca IN ICAO. PвKE. | 39A. LM CR3 |. 3 A4. | IN 1 tci +. CI01 +. R8. 3 K. 10v. SCRI I.

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Had a typo above corrected in red.

Please, do not make a copy of the rs-335m manual and manhal not offer to sell it, just use personally to repair defective appliance! Also checked negative side of DC output: While the Astron Linear PS designs have changed through the years — largely due to changes in electronic components RoHS, obsolescence, etc. I had called Astron but they were not very helpful, only saying “it depends” and not offering any rationale.

May 18, April 27, There are also Battery “BB” versions of the power supply. Instead, contact your nearest service center!

Astron RSM Manual

Contact the site with comments or questions. July 28, If this is something like a radio or a piece of industrial process equipment where there are distributed connections to the earthing system then it can introduce problems.

As for manuals, I wasn’t aware they had one or why a person would need one. I cannot find anyhting on Astron’s website, except their catalog.

I found that site and referenced it above also.

But this means that the line-cord on the power supply is also acting as the safety bond for the device I will say computer, instead of radio. The schematic is really all you need. As for illuminating the meter, that is a piece of cake. Good luck to the repair! Not sure what, if any, problems I might see as a result and am inclined to leave it alone for now.


If you are not familiar with electronics, do not attempt to repair! Now I’m hoping that older units were built better and this one will last me a good long while. Picked up a used RSM. Checked earth safety ground to chassis resistance: Is this the correct site? Because the ground conductors are also of different gauges wire size the DC return current from the radio is now also going to be trying to share the connection through the earth ground system.

The only other related thread I found nanual far is: It ended up being in one ground conductor that was not bonded correctly,it was a MCM cable that had 6 volts at amps running through it. When you get a transient lightning, fault, normal device switching it can behave in difficult to predict ways. July 30, The only way to find out is to try it I guess. Most other manufacturer sites I have visited have PDF download files for their equipment. A new series of videos is being posted for common repairs and educational for troubleshooting.

No manual is really needed mabual thought if one existed I would just store it. In addition, some files are archived, so you need WinZip or WinRar to open that files. The Astron website appears to only have a catalog and no support information. You can write in English language into the forum not only in Hungarian! I switched it on and just checked unloaded voltage with my DVM Maybe I need to try someone else there.

Dragging up an old topic. Usually astrn would be much more pronounced on instrumentation loops industrial control with pressure transmitters operating off of a mA current loop for example. I also thought maybe my meter lights were burned out, as some aztron noted, but on further searching found that since my unit has a fixed power cord, it’s likely older and never had meter illumination. To open downloaded files you need acrobat reader or similar pdf reader program. Also manal files are djvu so you need djvu viewer to open them.


Astron VS-35M Variable DC Power Supply gets an upgraded MOSFET over-voltage circuit

However, I suggest you Google this for a more detailed and no doubt better way of doing this. It appears you have a handle on operating the unit, even to the point of correcting meter errors. Sorry I just had to. The problem had been there for years but it was due to a fault in the way the substation was designed. If you want to join us and get repairing help please sign in or sign up by completing a simple electrical test or write your question to the Message board without registration.

There is no preview for this item! New to Ham Radio? If you have grounds on your radio equipment at other places like the antenna, tower, coax you are creating two earthing ground return paths of different capacity and with ever so slight differences in potential.

Searched all over for copy of whatever manuals might have been available but cannot find anything.