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Author Topic: No ignition
Ken Jablonski
Film Handler

Posts: 6
From: Nyack, New York USA
Registered: Mar 2008


 - posted 03-17-2008 01:24 PM      Profile for Ken Jablonski   Email Ken Jablonski   Send New Private Message       Edit/Delete Post 
Today I looked into the digital projector "No Ignition" problem and found 2 things. Its a modular unit. The service manual is all module replacement oriented (bummer). The diagnostic chart points to the Lamp Power Supply Module. This is no longer available but they might have a used one in their storage (for $3500). The voltage going to the unit reads 209VAC but the connector to the module looked a bit corroded. I cleaned and lubes the MOLEX with Penetrox A and so far its been starting on the first 5 sparks. Could just be luck today. I'll give it some time. I tried to read the lamp supply voltage with the lamp module out but it just popped the reset on my Fluke meter. What's up with that? Should only be a few hundred VAC.
Thanks for all the suggestions so far.
KEN

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Monte L Fullmer
Film God

Posts: 8367
From: Nampa, Idaho, USA
Registered: Nov 2004


 - posted 03-18-2008 12:10 AM      Profile for Monte L Fullmer   Email Monte L Fullmer   Send New Private Message       Edit/Delete Post 
quote: Ken Jablonski
I tried to read the lamp supply voltage with the lamp module out but it just popped the reset on my Fluke meter. What's up with that? Should only be a few hundred VAC.

prob called the ignition voltage of over 20Kv that took out the meter's fuse.

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John Hawkinson
Film God

Posts: 2273
From: Cambridge, MA, USA
Registered: Feb 2002


 - posted 03-18-2008 11:30 PM      Profile for John Hawkinson   Email John Hawkinson   Send New Private Message       Edit/Delete Post 
If it only took out the fuse, you're lucky. The ignition pulse can
fry the meter's internal circuitry, and generally speaking you should never have a meter connected while the lamp is being struck.

--jhawk

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