RACAL DANA programmable power supply 9242D - Page 1
Forum section: electronics / general

author: mj21
author_rank: Regular Contributor
timestamp: August 16, 2013, 08:54:55 pm
content: hirecently i purchased a RACAL DANA power supply, its a two channel 25 volt 2 ampere, and now one of the channels has stopped working. i am looking for the manual but i cant find anything on this.anyone got any info on this type of power supply or where to get manual or any info about this.thanks

author: eevblogfan
author_rank: Frequent Contributor
timestamp: August 16, 2013, 09:18:40 pm
content: HeyI personally don't , and usually I'll wait to hear and learn from more experienced guys in here , but there's something you should really adopt , and that's turning the DUT apartmy first repair in my new job was simply cold soldering , that's it ..It took me actually the time to tear it apart . checking rail voltages , until I probed the mains IEC shocket and I saw small pop , then I looked closely and Inspected cracked joint , All I had to do was simply suck the solder , clean with IPA , and then Apply new fresh solder , that's it ..now, you are right , the better approach is having the full schematics , then you can actually learn the fundamentals laying behind that device , such as Dave discovered in the last UPS video , where He asked himself where is the big high power charger ? , well if you saw the Vid , you could understand basic stuff, such as the parasitic of the MOSFET's structure .. turning H-bridg into Full bridge rectifier ..so if you did opened it up , well at least I tried

author: mj21
author_rank: Regular Contributor
timestamp: August 16, 2013, 09:27:34 pm
content: tnx, done that already. have spend three days trying to reverse engineer this thing. it is so poorly designed and all the parts are now obsolete.the problem is the pcb is so old lol that when i try to take parts out the tracks get lifted to.

author: PChi
author_rank: Frequent Contributor
timestamp: August 18, 2013, 10:57:49 am
content: Have you any pictures of it?I have seen some what appear to be Thurlby Power Supplies with something like a Racal Dana label. Though I may be dreaming. If was just a rebadging exercise someone might have a schematic for the orginal.

author: mj21
author_rank: Regular Contributor
timestamp: September 01, 2013, 11:36:59 pm
content: ye, here it is.

author: PChi
author_rank: Frequent Contributor
timestamp: September 03, 2013, 05:18:28 pm
content: Thanks for the picture but unfortunately I don't recognise it and never seen one like it before.

author: fcb
author_rank: Super Contributor
timestamp: September 03, 2013, 08:35:22 pm
content: Quote from: mj21 on August 16, 2013, 09:27:34 pmCan you explain why it's so poorly designed, and which parts you think are obsolete. Are you a professional EE? Why was it worth spending 3 days trying to reverse engineer it?The PCB is likely to be as old as the supply (which looks like late 70's to mid 80's).And a 10 second search, shows manuals available for the 9232 (Thurlby guts as PChi suggests):http://k1.dyndns.org/Vintage/Sinclair/Other%20Inventions/Other%20Electronics%20Products/SINCLAIR%20THURLBY%20PL%20SERIES%20POWER%20SUPPLY.pdf