[TechAssist] Re: Sharp LCD Projector XG-E850U. IC1702 in ballast circuit shorts out when lamp starts
- From: "DAMON BRUNGER" <damoneb@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 28 May 2005 09:32:35 -0500
Did you check for damper diodes on this IC? Is this the output IC connected
to the Hi V Xfmr?
Damon Brunger
Telrad Electronics
Fort Wayne IN
----- Original Message -----
From: "Dale Lubow" <harristv@xxxxxxxxx>
To: "TechAssist" <techassist@xxxxxxxxxxxxx>
Sent: Friday, May 27, 2005 11:40 PM
Subject: [TechAssist] Sharp LCD Projector XG-E850U. IC1702 in ballast
circuit shorts out when lamp starts
> I am working on a Sharp LCD projector model XG-E850U. When the unit
> came in the fans rand but the lamp wouldn't light. I found that pins
> 2,3 & 9 of IC1702 were shorted. I replaced IC1702 and the unit ran
> fine until it was shut off. Again the fans ran but the lamp wouldn't
> light. I found IC1702 shorted the same way again. I am assuming IC1702
> works long enough to start the lamp but isn't needed to keep it
> running. Has anyone had any similar problems with this unit?
>
> TIA,
> Dale
> --=20
> Dale A. Lubow CET
> Harris TV & Appliance
> 335 Lincoln Way
> Ames, IA 50010
> 515-232-1109 (Voice)
> 515-232-3356 (Fax)
> HarrisTV@xxxxxxxxx
> --------------------------------------------------------------------------
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