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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Usually this would be much more pronounced on instrumentation loops industrial control with pressure transmitters operating off of a mA current loop for example. Had a typo above corrected in red. I’ll recheck meter zero, which I think was good, and then adjust pot R inside, as necessary.

The last I checked Astron website had schematics of all their linear power asfron. Also checked negative side of DC output: Instead, contact your nearest service center! I found that site and referenced it above also. If you can’t find the schematic of the RSM, let me know. To open downloaded files you need acrobat reader or similar pdf reader program. Rw-35m 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.

Anyone have a copy or know where I could obtain it? There are also Battery “BB” versions of the power supply.

Mankal provided my serial number and they were able to tell me it was manufactured in May serial: The schematic is really all you need. A new series of videos is being posted for common repairs and educational for troubleshooting.


Astron RSM Manual

If you are not familiar with electronics, do not attempt to repair! July 30, As for manuals, I wasn’t aware they had one or why a person would need one. I have seen this happen with a substation where we have this gigantic buried ground mesh. Trying to balance out our three phase loads we noticed that there was an unaccounted for power loss.

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. Repairing the Astron RSA http: 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.

While the Astron Linear PS designs have changed through the years — largely due to changes in electronic components RoHS, obsolescence, etc. The problem had been there for years but it was due to a fault in the way the substation was designed. Not too much in there but you can never have too much info. Not sure what, if any, problems I might see as a result and am inclined to leave it alone for now.

This file is downloadable free of charge: Astron sent me a manual in e-mail. If this is the reason, announce it with the blue man manuxl on the top and I remove it.

Powered by SMF 1. For some new radio amateurs English is a second language, and can better understand some electronics concepts and repairs via video YouTube instruction or pictorial diagrams.


Also some files are djvu so you need djvu viewer to open them. In addition, some files are archived, so you need WinZip or WinRar to open that files.

Astron VSM DC power supply

New to Ham Radio? As for illuminating the meter, that is a piece of cake. It appears you have a handle on operating the unit, even to the point of correcting meter errors. Picked up a used RSM. The only other related thread I found so far is: 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.

This creates what is known as a “ground loop” that can introduce AC hum in to the DC supply ground return leg. Icom America does answer their telephone for support calls. I switched it on and just checked unloaded voltage with my DVM I had called Astron but they were not very helpful, only saying “it depends” and not offering any rationale.

When you get a transient lightning, fault, normal device switching it can behave in difficult to predict ways.

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

May 18, You can write in English language into the forum not only in Hungarian! Good luck to the repair!

July 28, ,