[TechAssist] Re: Zenith PRO880 picture reversal procedure
- From: "Leonard Caillouet" <lcaillo@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 2 Feb 2005 06:16:13 -0500
Rear projection applications are not uncommon, with and without mirrors.
You see them in museums, amusement parks, conference rooms, etc. You can
buy rear projection screens from several of the screen manufacturers in just
about any size you want, but they are expensive.
Leonard Caillouet
Electronics World
1261 NW 76 Blvd
Gainesville, FL 32606
352-332-5608
FAX 352-332-5668
----- Original Message -----
From: "Jim Myers" <jr.myers@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, February 01, 2005 1:44 PM
Subject: [TechAssist] Re: Zenith PRO880 picture reversal procedure
Guess you're right, I had never heard of changing one to a rear projo.
Whadda ya do then, add a mirror, a cabinet and a screen?
********************************
Since 1972 *
Jim Myers *
Telrad Electronics *
Fort Wayne Indiana *
********************************
Leonard Caillouet wrote:
> Of course you can. Just reverse the polarity on the horizontal yokes.
> These had connectors that made it easy, IIRC.
>
> Any CRT based projector can be reversed for rear projection in this
manner.
> Same for ceiling mounting vs floor mounting, just reverse the H & V yoke
> polarities. There may be geometry range problems with the latter if not
> designed to do so, but even that can be affected by reversing the
> convergence yokes in most cases.
>
> Leonard Caillouet
> Electronics World
> 1261 NW 76 Blvd
> Gainesville, FL 32606
> 352-332-5608
> FAX 352-332-5668
>
>
>
> ----- Original Message -----
> From: "Jim Myers" <jr.myers@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Monday, January 31, 2005 2:54 PM
> Subject: [TechAssist] Re: Zenith PRO880 picture reversal procedure
>
>
> I don't think you can change it from a rear to a front projo or
> visa-versa but you can change it from a celling to a floor mount and
> visa-versa. Once you get the covers off and locate the yoke connectors
> it should be obvious.
>
>
> ********************************
> Since 1972 *
> Jim Myers *
> Telrad Electronics *
> Fort Wayne Indiana *
> ********************************
>
>
> John at Main TV wrote:
>
>>I have a service call to reverse the picture on this set. The customer
>
> was
>
>>using it as a rear projector and now wants to use it for a front
>
> projector.
>
>>He originally changed it from front to rear but he forgot the procedure
>
> and
>
>>now Zenith will not give him the procedure. (according to him). He
>
> thought
>
>>it required changing a plug. I did a google search for that number and
>
> find
>
>>only sales info. At www.zenithservice.com I entered PRO880 for the owners
>>manual and it said "no such number". The customer said that is the only
>>model number on the unit. Any help appreciated, John.
>>John Mielke
>>Main TV
>>636 main St.
>>Longmont, Co
>>phone 303 776 6955
>>fax 303 776 0792
>>maintv2004@xxxxxxxxxxx
>>
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