Film-Tech Forum ARCHIVE: Christie CH10 Ignition Problem

This is topic Christie CH10 Ignition Problem 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=008536

Posted by Randy Bowden (Member # 587) on 03-01-2007, 04:15 PM:

I went out to one of our theatres to replace an igniter in a christie CH 10 console, the console has a long history now of not being able to auto strike. It will however manually ignite very easily. I installed a new IGA 10 igniter and still no auto strike. So I checked the no load dc voltage at the power supply (they are running a strong switcher supply) the dc voltage was only reading 65 vdc. not high enough to autostrike. With the DC cables disconnected the power supply puts out about 160 vdc. Any idea what would cause such a significant voltage drop?

Posted by Mark Gulbrandsen (Member # 72) on 03-01-2007, 07:40 PM:

Other than the time delay tubes drifting with age in the ignitors I would be thinking about switching the switcher. I find it hard to believe that 60 volts DC no load will consistantly ignite a hot lamp even manually.

Mark

Posted by Randy Bowden (Member # 587) on 03-01-2007, 07:56 PM:

I did replace the switcher...sorry I failed to mention that, and what I found was the same identical no load voltage of 65vdc. the lamp is only a 1K and I don't know if that has any bearing on it still being able to strike. I also inspected all the DC connections for looseness or corrosion, tested continuity.

Posted by Richard Hamilton (Member # 321) on 03-01-2007, 08:53 PM:

you have a short in the system some where. Disconnect the DC leads and check it to ground check pos and neg separate

NOT MY POST....RICK

[ 03-02-2007, 12:09 AM: Message edited by: Richard Hamilton ]