[TechAssist] Re: Zenith PV4661 Projection TV
- From: "David Lessard" <mrfixit@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 2 Jan 2003 20:19:21 -0500
Larry, Thanks for the tips, another couple of questions, are these resistors
surface mount of through hole? Just wondering what to bring to the customers
house. Is this TV hard to get into? I would like to appear at least
semi-intelligent when I open it up, :-)
David Lessard
mrfixit@xxxxxxxxxxx
-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of Larry E.
Sent: Thursday, January 02, 2003 8:24 PM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: Zenith PV4661 Projection TV
Dave, did you check/replace R3243 110K 1/2 watt? have to pull one leg to
check it, goes way up in value and sometimes opens. Note that it`s
VERY difficult to find, it`s located by the HOT heatsink usually on the
right side,behind the heatsink, once you find R3244 (82K) your close
they are in series with each other, have seen several of them cause your
problem, also causes convergence problems, ie, no video with 3 bowed
bars, 1 red, 1 blue, 1 green, Hope this takes care of it for you,
Larry Eastman
American TV & Electronics
Crystal River, Fl. 34428
www.tvjunkyard.com
David Lessard wrote:
> Ed, Yeah I thought about the filament voltage at first but it doesnt make
> sense that the menu is still present after the picture goes out. So its
only
> the video that dissappears, what caps are most likely to cause this
problem?
> Are they surface mount? I have no information on this chassis, can you
help
> out? Diagrams, schematics, tips, anything...Thanks a bunch Ed.
>
> David Lessard
> Alexandria Electronics
> mrfixit@xxxxxxxxxxx
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of Tel-Tek Electronics
> Sent: Thursday, January 02, 2003 4:54 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: Zenith PV4661 Projection TV
>
>
>
> David;
> This is the C8S chassis. Without seeing it, hard to say, but sounds like
> probably a bad connection on the board for the Filament voltage. Unless
it's
> only the Video that dissapears, then you got some bad Caps to contend with
> in the Video circuit.
>
> -Ed-
> ----- Original Message -----
> From: "David Lessard" <mrfixit@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, January 02, 2003 4:08 PM
> Subject: [TechAssist] Zenith PV4661 Projection TV
>
>
>
>>Hi techs,
>>
>>Has anyone ever heard of this model before? Google search turns up
>>
> nothing.
>
>>Customer describes the problem being a slow picture start (2-5 minutes -
>>gradually) however OSG menu is visible before picture starts to come in,
>>then after 30 minutes picture goes black again, shut down and cool off
>>period required before trying again. Not sure if OSG menu is still visable
>>at this point, forgot to ask, I will follow up on this. Any help would be
>>appreciate.
>>
>>Thanks.
>>
>>"Share what you know, Learn what you don't"
>>
>>David Lessard
>>Alexandria Electronics
>>50 Harrison Street
>>Alexandria, Ontario
>>K0C-1A0
>>mrfixit@xxxxxxxxxxx
>>
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--
Larry Eastman
American TV & Electronics
Crystal River, Fl.
http://www.tvjunkyard.com
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