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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I had called Astron but they were not very helpful, only saying “it depends” and not offering any rationale. New to Ham Radio? Looking for other manual? I’m thinking maybe the Astron should be set that way too if iCOM designed their “system” that way.

It appears you have a handle on operating the unit, even to the point of correcting meter errors. There are also Battery “BB” versions of the power supply.

Astron RSM Manual

Not too much in there but you can never have too much info. The last I checked Astron website had schematics of all their linear power supplies. 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.

Please, do not make a copy of the downloaded manual and do not offer to sell it, just use personally to repair defective appliance!

Not sure what, if any, problems I might see as a result and am inclined to leave it alone for now. Rs-35k to balance out our three phase loads we noticed that there was an unaccounted for power loss.


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. April 27, The Astron website appears to only have a catalog and no support information. 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. Is this the correct site?

I switched it on and just checked unloaded voltage with my DVM Usually this would be much more pronounced on instrumentation mahual industrial control with pressure transmitters operating off of a mA current loop for example.

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

Contact the site with comments or questions. So, if you do not have any other sort of ground connection on the device you can safety bond the negative return to the earth ground. July 31, Dragging up an old topic. You can login to do that! You could suffer a fatal electrical shock! Two white LEDs with a single dropping resistor is all that is needed. Maybe I need to try someone else there. Also checked negative side of DC output: These free programs can be found on this page: The schematic is really all you need.

A new series of videos is being posted for common repairs and educational for troubleshooting. If this is the reason, announce it with the blue man icon on the top and I remove it. I found that site and referenced it above also.

This creates what is known as a “ground loop” that can introduce AC hum in to the DC supply ground return leg. 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. How to contact Icom America Technical Support: 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.


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. Picked up a used RSM. May 18, On further searching, I found a wealth of info here: Searched all over for copy mnaual whatever manuals might have been available but cannot find anything.

I’ll recheck meter zero, which I think was good, and ds-35m adjust pot R inside, as necessary.

While the Astron Linear PS designs have changed through the years — largely due to changes in electronic components RoHS, obsolescence, etc.

There is no preview for this item! The LEDs can be attached many ways, including a hot glue gun. To open downloaded files you need acrobat reader or similar pdf reader sstron.

We’ll see you in a couple of weeks it’s that deep of a bench. August 14, However, I suggest you Google this for a more detailed and no doubt better way of doing this.