This is topic Orcon CV 1600 rectifier burning wires to the diode block in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.


To visit this topic, use this URL:
https://ft-forum.com/ft/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=1;t=008805

---

Posted by Brant Veilleux (Member # 2877) on 07-03-2007, 11:18 AM:
 
I am trying to troubleshoot a screen 800 miles away and am getting limited information. Wondering if anyone has run across something similar or may have a part #.

This is an Orcon II console. Like the subject line states the rectifier is an Orcon CV 1600

The symptoms are:

1) The leads to the Diode block are burning and are being replaced every 4 - 6 days. The diodes have been checked and are good. Voltage and amperage output is within operating limits.
2) The large capacitor on the rectifier is split. I figure replacing this would be an obvious start. Though, I can not make out a replacement part # or specs in any of the 1600 Orcon / ORC manuals I have found online. I am also wondering if there may be underlying cause beside the fact that the machine is almost as old as I am.

Any ideas or information would be appreciated.
 

---

Posted by Jack Ondracek (Member # 1466) on 07-03-2007, 01:58 PM:
 
Which leads are you talking about... coming from the transformer or the bulb? If you've been replacing the wires for awhile, somebody might have used something too small and you're now copying from a past mistake. That lamphouse is rated up to 80 amps. What are you running?

This might be the book for your console. It's in the manuals section.

http://www.film-tech.com/warehouse/wareview.php?id=378&category=2

According to that, your caps are 4500mFd at 150Vdc. If they're as old as you say, they probably needed replacing years ago. You can get caps like that from places like Mouser and Newark Electronics. Both companies have online catalogs.
 

---

Posted by Mark Gulbrandsen (Member # 72) on 07-03-2007, 02:26 PM:
 
Oh come on 800 miles is nothing! Get yer ass in the car and get over there! I know techs that have droven further just to re-set a circuit breaker.

Is the replacement wire large enough for the current level? What type of crimps or lugs are U using? This rectifier was I believe built by LP associates and they are still making them for Strong or did until recently but they are still making them under the LP name. They were always pretty good rectifiers, age doesn't matter with this stuff. In fact the rectifier is the best part in that console .

Mark
 

---

Posted by Gordon McLeod (Member # 33) on 07-03-2007, 03:03 PM:
 
Is this the leads from the heatsinks to the caps or the leads on the diodes
If it is the leads on the caps I suspect they put wire there rather than the piece of nichrome that was used to limit the inrush current
 

---

Posted by Brant Veilleux (Member # 2877) on 07-03-2007, 08:14 PM:
 
The leads to the diodes coming from the transformer are what are being replaced. Apparently, the diode block is getting abnormally hot. From what I have been told they are being replaced with the same AWG as used in the other identical rectifiers at the site that do not exhibit the problem. I am fairly confident that it isn’t as simple as that.

The Lamphouse is pulling ~65 amps with a 1600 watt bulb.

I am wondering if a bad capacitor might be the cause of this.

quote: Mark Gulbrandsen

---

... age doesn't matter with this stuff.

---

quote: Gordon McLeod

---

If it is the leads on the caps I suspect they put wire there rather than the piece of nichrome that was used to limit the inrush current

---