[TechAssist] Re: Philips F8 - Vert Problem
- From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 12 Oct 2004 06:47:56 -0400
Suspect the yoke!
Bob Waterman, CET® #RI-28
Master Technician License #9109
Service Manager / Parts Manager
Gemini Computer, TV, & Security Alarms
(508)695-7302
(508)695-7769 FAX
geminitv@xxxxxxxxxxx
----- Original Message -----
From: "Dan Garris" <dgarris@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, October 11, 2004 10:01 PM
Subject: [TechAssist] Re: Philips F8 - Vert Problem
> Thanks Max, I do have the Sams #4596 to go by for now. I was just hoping
> some other Tech has ran across this odd vertical problem on these common
> Philips F8 Chassis. I am at home right now but will troubleshoot more in
the
> morning. Thanks again Max for the very kind offer.
>
> Dan Garris
> Garris TV
> New Bern, NC
> dgarris@xxxxxxxxxxx
> (252) 638-4477
>
> >From: mebonnell@xxxxxxxxx (Old TV Man)
> >Reply-To: techassist@xxxxxxxxxxxxx
> >To: techassist@xxxxxxxxxxxxx
> >Subject: [TechAssist] Re: Philips F8 - Vert Problem
> >Date: Mon, 11 Oct 2004 16:29:57 -0500
> >
> >Dan I have the schematic if you want any of it scanned.
> >
> >Max Bonnell
> >Bonnell TV
> >Robinson, IL
> >
> >Sender: techassist-bounce@xxxxxxxxxxxxx From:
> >dgarris@xxxxxxxxxxx(Dan=A0Garris) Date: Mon, Oct 11, 2004, 5:03pm
> >(CDT+1) To: techassist@xxxxxxxxxxxxx Subject: [TechAssist] Re: Philips
> >F8 - Vert Problem? Reply=A0to: techassist@xxxxxxxxxxxxx
> >
> >Thats what I thought as well. I have no Yoke buzzing and the picture has
> >no Convergence problems or keystoning - just the bottom half of the
> >picture has "lots of lines" in it. You can see thru the lines and make
> >out the bottom of the picture and when you change channels the On-screen
> >display (which shows at the top of the picture) can be seen retracing at
> >the bottom of the screen along with the lines in the bottom of the
> >screen. The top half is fine. I even replaced C2489 even though it
> >tested ok with the ESR meter. I still have the problem. I've not seen
> >this problem on the F8 before!
> >
> >Dan Garris
> >Garris TV
> >New Bern, NC
> >dgarris@xxxxxxxxxxx
> >(252) 638-4477
> >
> >From: "John at Main TV" <maintv2004@xxxxxxxxxxx>
> >Reply-To: techassist@xxxxxxxxxxxxx
> >To: <techassist@xxxxxxxxxxxxx>
> >Subject: [TechAssist] Re: Philips F8 - Vert Problem?
> >Date: Mon, 11 Oct 2004 14:47:15 -0600
> >
> >The F8 is very common for yoke problems but your symptom does not sound
> >like
> >a yoke. It usually causes bad convergence or a buzz. The only way that I
> >know to check is by substitution from another 27 ". Or if you swap one
> >from a 25", it will work but the convergence will be way off. The cost
> >of the yoke is around $50. The common problem for foldover on the bottom
> >is C2489. John.
> >
> >John Mielke
> >Main TV
> >636 main St.
> >Longmont, Co
> >phone 303 776 6955
> >fax 303 776 0792
> >maintv2004@xxxxxxxxxxx
> >
> >----- Original Message -----
> >From: "Dan Garris" <dgarris@xxxxxxxxxxx>
> >To: <techassist@xxxxxxxxxxxxx>
> >Sent: Monday, October 11, 2004 2:19 PM
> >Subject: [TechAssist] Philips F8 - Vert Problem?
> >
> >Make: =A0 Philips 27" TV
> >Model: =A0 TS2746 C101
> >Chassis: F8
> >
> >Has vertical lines (bad vertical foldover) only on "bottom half" of
> >picture. Top half of picture looks fine. I replaced the STV9379FA
> >Vertical output
> >IC
> >(no change) and checked all vertical caps and C2489 (all ok) (no change)
> >also checked R3409 & R3488 out of circuit (they were ok). TV does not go
> >into shutdown nor does it have any keystone effect, just bad Vert
> >foldover on bottom half of picture. Tips say maybe bad Yoke?
> >BTW, This is "NOT" the common bright screen symptom caused by R3340 on
> >the CRT board. This set stays on and has a picture. Anyone seen this
> >problem?
> >Is
> >it the Yoke?
> >
> >Dan Garris
> >Garris TV
> >New Bern, NC
> >dgarris@xxxxxxxxxxx
> >(252) 638-4477
> >----------------------------------------------
> >---
> >
> >
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