[TechAssist] Re: Zenith PV4661 Projection TV
- From: armando guerra <birdie@xxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Mon, 13 Jan 2003 15:41:04 -0700
It sounds like you have a bad A-17196-05 focus bleeder assembly.A very common
failure in the sets.However,most of the dist.have them on back order.
Mando
Birdie's TV & Electronics
Casa Grande, AZ
David Lessard wrote:
> FOLLOWUP: I just got back from checking out this TV in person. Symptom
> details: TV plugged in, SMPS fires up, press "ON" button, Front PWR LED is
> lit, HV starts but only for a second (crackling heard), just long enough to
> see tubes flicker, you can hear audio amp power-up (speaker click is heard),
> Front PWR LED remains lit. Before all these problems started the customer
> said the TV would come on but with no video, only OSG and audio worked
> (eventually the video worked but shutdown occurs within 30 minutes). What
> can cause a shutdown? The audio amp board has a seperate PS, it's not
> flyback supplied. What about the vertical circuit as Jeff suggested? I need
> a service manual (schematics) please, anyone? Thanks gentlemen.
>
> David Lessard
> Alexandria Electronics
> 50 Harrison Street
> Alexandria, Ontario
> K0C-1A0
> (613)525-4502
> mrfixit@xxxxxxxxxxx
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of Jeff Dougherty
> Sent: Friday, January 03, 2003 4:38 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: Zenith PV4661 Projection TV
>
> David,
> Troubleshoot your vertical circuit.
> I have a feeling there may not have been OSD before..maybe customer was
> mistaken.
>
> support@xxxxxxxxxxxxxxxxxx
> FAX 717-564-4952
> Jeff Dougherty
> Intrepid Video & Electronics Be careful of your thoughts.
> 501 Luther Rd They may become your words
> Harrisburg, PA 17111 any moment.
> 717-909-8844
> VCR tips, electronics info & general interest.
> www.intrepid-video.com www.tech-repair.net
> www.thetoolcaddy.com www.9-11-2001tragedy.com
> ***********************************************************************
>
> ----- Original Message -----
> From: "David Lessard" <mrfixit@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, January 03, 2003 12:40 PM
> Subject: [TechAssist] Re: Zenith PV4661 Projection TV
>
> Hi Larry, Module I need is 9-815 however this is no longer available from
> Tristate. Flyback hasn't been made since 1997. Also, new problem, client
> turned on TV last night to double check the symptoms and now this is whats
> going on. Sound comes on right away, there is a horizontal red/green line
> visible for a split second, no menu visisble now, there was before, the
> sound is OK and obviously the flyback is working. Being half alive I'm sure
> I could fix this beast however I have resources on it what so ever, if
> ANYONE has schematics please let me know, I would like to study the circuit
> before heading over the customer.
>
> Thanks.
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of Larry E.
> Sent: Friday, January 03, 2003 9:26 AM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: Zenith PV4661 Projection TV
>
> David, Don`t have the print so I don`t know the module # you can call
> Tri-State and they`ll look it up for you and give you a price, yes there
> is a dud charge but Tri-State will also sell it to you outright, there
> # is 800-203-7484.
> Larry Eastman
> American TV & Electronics
> Crystal River, Fl.
>
> David Lessard wrote:
>
> > You don't happen to know what module I need? Is it the whole chassis? I
> > know nothing about this projection TV and because of this I believe it
> > may be more practical to purchase and swap (is there credit for a dud?).
> > Thanks again.
> >
> > David Lessard
> > mrfixit@xxxxxxxxxxx
> >
> > -----Original Message-----
> > From: techassist-bounce@xxxxxxxxxxxxx
> > [mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of Larry E.
> > Sent: Thursday, January 02, 2003 8:53 PM
> > To: techassist@xxxxxxxxxxxxx
> > Subject: [TechAssist] Re: Zenith PV4661 Projection TV
> >
> > Dave, regular 1/2 watt resistors mounted on the top, just a real pain to
> > see it where it`s located,mine was a PV4665, but I`m pretty sure they
> > are the same, from the back of the set look at the right corner of the
> > HOT heatsink and you should be able to see R3244 the 82K, the R3243 is
> > usually on the other side of the heatsink next to R3244, Remember that
> > you can always swap the module if it gets too involved, available at
> > Tri-State module. I usually spend 1 hour troubleshooting a Zenith
> > Bigscreen to component level, after that I just swap the module, good
> > luck Dave, Larry E
> >
> >> David Lessard wrote:
> >>
> >>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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