Bertan HiV Power Supply

[drtaylor]

Does anyone have or know a source for a schematic to the Bertan-210-01R Hi Voltage Power Supply? Spellman acquired the Bertan line a while ago, but the person that needs their 210 repaired was told by Spellman that they had no documentation for the 210 series (really?). A quick Google search yielded a manual and a spec sheet, but the manual did not have schematics.

This is a 1kV @ 225mA power supply. Looks to be fully analog with an analog meter. The data sheet copyright from Spellman is dated 2005, but I suspect this design is quite a bit older than that.

[JoekV]

I am in similar situation with an ebay 210-50P. But the control circuit looks analogue only and it does not have many parts.  Would have been interesting if you had asked for a quote to repair, if they could manage it given they don't have info?

Maybe a similar power supply from Bertan may yield at least part of the schematic?

Any takers?

[precaud]

My hunch is Spellman stopped releasing docs on this series because they wanted them all to come home for service/repair.

I've serviced a number of 210s. Years ago I happened to get a 210 manual with some schematics, dated 7/1983. The design was not stable. I don't think I ever saw one that matched the manual. Or two that were the same.

I've attached a block diagram for the 01R, 03R, and 05R. And a schematic for the PCB100 controller board. Probably the most useful thing about them is that the functions for each card edge pin are identified, which can then be traced to other parts of the device.

Good luck...

PS - another 8060A fan here. I have one of the IBM ones. Kudos for the great design!

[JoekV]

Thanks, those are the first circuit diagrams I have seen for these supplies and will be very useful.

I think that the 50kV units are different from the lower voltage ones. The circuit diagram mostly matches what I have seen on the board.  I pulled out the main board and connected it to my bench power supply for debugging as the sound of ~50kV flying out the back was scaring me. Without the benefit of the diagram I checked IC voltages and replaced eletros that had corroded, as well as few other bits.  I also checked the voltage reference, which is an LM399H.  But still no change, no response to the control potentiometer and I assume full volts flying out the back.

I am thinking that the voltage feedback path is not working but didn't know where to look for it. The circuit diagram will give me a chance of repairing it now, but happy to take advice.

[wishboneash]

I put up a video of a repair of the 210-01R supply on Youtube along with some early results after the fix. https://youtu.be/EWIDEXN0Tbc

Turned out to be a simple problem with a bad electrolytic cap (I think there are three electrolytic caps in this thing). Thanks for posting the schematics here, they were immensely helpful.

I am amazed at the accuracy of the thing; it's within 0.3% (absolute) and shows good load regulation, tested up to 100mA. I am not getting it drive more than 100mA although (tried up to 200V under load). I can get it to 200mA under short circuit condition. I am planning to build a 2kohm resistor that can handle 250mA or so, so I can test it up to its maximum voltage.

Comments welcome.

[doktor pyta]

wishboneash,

thanks, I appreciate your video.
I have low power model 225-10R.
I asked Spellman's customer service for the schematics or at least page with internal trimpots description. No answer.

[NSV11UP]

I have a Bertan 210-50P HV supply that was tested and found not to be fully functional.  The unit goes to full output upon power up with the variable output control non responsive.  I am also having trouble obtaining a service manual or schematic diagram to assist with troubleshooting.  I am not sure how similar the circuits are to the other 210 series units but suspect there are differences.  Does anyone have any schematics for the 210-50P model or leads where to obtain them?  Thanks.

[precaud]

I have a 210 manual that I no longer need, PM me if interested. I also have a 210-50 with no output if you need any parts from it.

[HalFoster]

If it helps anyone, here is the manual for the Bertan 214/215

https://drive.google.com/file/d/1s_ZCGu_paCfqXknEk20AjORUCveXLe4g/view?usp=sharing

Hal

[hana.hamdy]

I have a Bertan High Voltage Power Supply 210-02R. Unfortunately, a few months ago, a resistor in the control board (P/N 209009 H) was burnt in such a way that it was broken, became black and its value disappeared.
If someone has the same power supply, can he please send me the value of this resistor?
Attached are pictures of the board with a red circle around the place of the burnt resistor.
Thank you.

[HalFoster]

I don't have a schematic, but from the pictures I would feel it to be very likely that the one burnt (R102) is a 10R the same as R101 to it's left.  Why it burnt is, of course, the question. Bertan likes to use those in series with the power rail output from the regulators - with it burnt, it would mean there is a short somewhere. The dipped tantalum capacitors would be a likely possibility.

Hal

Hal