On Saturday 14 December 2002 01:23, you wrote: > Well as far as I know it is an Australian clone (of perhaps a Tektronix but > I'm not sure). I'm up for the challenge of fixing it, and need it any way > since I'm a student. > I'll test the transformer outputs, and my use a step down transformer > connected to the high v outputs to test them. I'm pretty sure that�s the > problem, I don't want to put my head and ear too close to the circuit when > its on but I'm sure the sound comes from the transformer (EHF or inverter > transformer? Not named in diagram) There is no smoke and as far as I can > tell it doesn't get overly hot. You're exactly right though Declan, I have > never fixed a scope or power supply. All I'm going by is my superficial > knowledge of electronic circuits to locate and solve the prob by looking at > the schematic. Like I said it would help if I had a scope to fix it ;) > Thanks for inputs and I'll try your suggestions.
Personally, I wouldn't let a 'scope near it - they're sensitive to overvoltage and you don't know what voltage you've got. Another trick is to get a 10 meg resistor and put an ammeter in series to find out what your kv is. Personally, it sounds like bvreaking down in the secondary windings - open circuit (arcing) or insulation breakdown. If the transformer makes noise on no load, it's toast. Then, try your tv suppliers. Most of these hv transformers are made by a few companies in the Far East. If there's a number on it, they can sometimes order it in for you. -- Regards, Declan Moriarty. -- Author: Declan Moriarty INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
