[TechAssist] Re: Zenith PV4661 Projection TV
- From: "tvservice" <tvservice@xxxxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 14 Jan 2003 16:41:18 -0600
David,
I sent you a message earlier to unplug a small 2 wire connector from HV
bleeder to sweep board just in front of standup daughter board this is the
feed back line for shutdown. If the set comes on with hii voltage and
picture with this loose,replace HV bleeder #A-17196-12 this replaces
the -05
this part is on national backorder.
Also check for bad solder on the daughter board
Robert
tvservice@xxxxxxxxxxxxxxxxxxx
H & H Electronics Inc
----- Original Message -----
From: "David Lessard" <mrfixit@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, January 14, 2003 4:52 AM
Subject: [TechAssist] Re: Zenith PV4661 Projection TV
>
> Mando, How can I confirm this is the problem, Is there a test I can
perform?
> Someone mentioned removing a wire from the focus assembly but I accidently
> deleted the email. Thanks for the input sir.
>
> David.
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of armando guerra
> Sent: Monday, January 13, 2003 5:41 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: Zenith PV4661 Projection TV
>
>
>
> 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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