Ion Gun System EXO3 - Power Supply without high tension output! - Page 1
Forum section: electronics / repair

author: crdevia
author_rank: Newbie
timestamp: September 09, 2015, 07:08:17 pm
content: Hello, how are you?I have a problem with the power supply of a Ion Gun System EXO3. The power supply lights but when I try turn-on the high voltage to work with Energy or Focus, I have no voltage at the output of these pins.The power supply has an inverter circuit for power electronics and two circuits to generate high voltage, and other circuits. The problem that I have is that the primary of planar high voltage transformers are shorted. So, my question is:Does anyone know the make and model of the transformer shown in the picture accompanying this post? Could you please recommend a company that marketed where I can buy it?At the top of the transformer registration it is:99ITG|2020257JThank you.Charly

author: Someone
author_rank: Super Contributor
timestamp: September 10, 2015, 01:00:53 am
content: If you do not know the specifications how do you know it is shorted? Switching supplies can have extremely low resistance primaries when designed for high voltage generation.

author: crdevia
author_rank: Newbie
timestamp: September 10, 2015, 04:13:35 am
content: Thank you for response.The primary winding is shorted because no inductance. The voltage applied to this primary is +/- 12V - 28,7kHz. (PWM 50%).

author: crdevia
author_rank: Newbie
timestamp: September 10, 2015, 03:47:22 pm
content: Add information.The diagram of the high voltage circuitry that I can take of the plate and an image of the front.If anybody know the mark and model of the transformer, let me know please.pd:Remember, the primary winding of both transformers is shorted.Thank you.

author: bktemp
author_rank: Super Contributor
timestamp: September 10, 2015, 06:33:19 pm
content: Interessting. The transformer is used as a flyback, but it looks like a CCFL inverter transformer: The primary has a centre tap and a feedback winding for the royer type inverter.Therefore it is probably not a custom designed part.

author: crdevia
author_rank: Newbie
timestamp: September 11, 2015, 04:17:06 pm
content: Bktemp, you've hit the jackpot. This transformer is a type of CCLF inverter transformer. The primary has a centre tap and a feedback winding for the royer type inverter, and it's not a custom design.Thank you very much for your information.Now, when I change the transformer, I'll came back for comment about the control circuitry and the repair.Thanks

author: crdevia
author_rank: Newbie
timestamp: November 20, 2015, 06:28:44 pm
content: Well, as I promised, I have returned to show them how I can repaired the power supply for the Ion gun EX03 model: 8558 (Thermo Electron Corporation ).With the help of mktemp, I knew that transformers that were broken were generic CCFL transformers. With this information and after studying the control circuit both stages, I could fit two generic CCFL transformer obtained from a pair of LCD monitors. The power stage is the first to be repaired as the FOCUS function works in the first. It is important to prove that the working range of both is the one indicated by the specifications (0 to 3 kV), if they do not, can be corrected with potentiometers that are part of the control circuit. So far I've had in vacuum and both work well. Finally and although it is obvious, it is clear that it is important to study the operation of the ion gun, because if you do not know how it works, maybe electronics equipment like a bit embarrassed and do not know because it works in a certain way.I have some photos of the transformers placed. I will return with a video when operating in the rack.Thank you very much and see you.