EP-613 linear reg. power supply ,looking for service manual or schematics.

[dorke]

I recently got this linear triple power supply 0-30V/2.5A variable,12v/5v fixed.
Need the service manual or schematic in order to repair and calibrate it.
It is sort of a generic/label unit goes under various names Manson/Rapid/Velleman/OF.I etc.
I searched the net ,couldn't find it.
Does anyone have it?
Thanks

 

[73's de Edd]

SIr dorke . . . . .
How about checking to see if that basic design is using tandem 3055 transistors as the pass transistors and is based upon a 723 chip as the regulator and its variable aspects..

73's de Edd

 

[dorke]

Yes,I can do that.
I can also create a full diagram by tracing the devices and boards etc.
but I rather have the diagram instead of all that work and time...

 

[73's de Edd]

That's why I asked of the design . . . I have seen both types.
A unit using a giant transformer for a linear AC power supply OR a unit with switch mode technology and ferrite power transformers.

 

[dorke]

It's Linear.

 

[FunnySmell]

I recently got this linear triple power supply 0-30V/2.5A variable,12v/5v fixed.
Need the service manual or schematic in order to repair and calibrate it.

Okay, had to renew my pw to reply dorke. I can't help you with a service manual and not sure that this price level one would exist in the wild so to speak. I have two of these under the brand Manson EP613; one is not working properly and after some repair work it works to an extent. The 2nd one was a backup and sat in a cupboard for many years. Now it is in service with a cheaper and better specc'd 10A job. If I was in your predicament I would contact this bloke: https://owenduffy.net/equipment/EP613/index.htm
who seems to know his way around these units far better than me.
Good luck!

 

[bertus]

Hello,

Perhaps this blog might help:
https://www.eevblog.com/forum/repai...-bench-power-supply-repair-schematics-needed/

Bertus