[TechAssist] Re: Phillips 25B800 , shut down, need schematic

From: "Terry J Hutchison" <sony1@xxxxxxxx>
To: techassist@xxxxxxxxxxxxx, techassist@xxxxxxxxxxxxx
Date: Tue, 25 Jan 2005 23:39:11 -0500
Glad someone else brought this up.  I have seen at least 5 of these in 2004
very similar to what you describe.  If I am not mistaken the screen
adjustment was backward on those sets ie, CW turned brightness down and I
tweaked it a little each turn on until sets finally came on and ran thru 72
hr burn in.  I never noticed any leakage from focus to screen adjustment so
when set would run I did not change out IHVT.  Was waiting to see if anyone
else was running into these and whether Phillips was putting out bad IHVTs
in these 800 chassis like those Konka IHVTs in thier generic sets.  Good
luck.  Terry


> [Original Message]
> From: Phil Bader <tjanphyl@xxxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Date: 1/25/2005 6:00:08 PM
> Subject: [TechAssist] Re: Phillips 25B800    ,  shut down,  need schematic
>
> I had a wierd issue similar to this. The HV disc ceramic on the CRT 
> board was breaking down under load. It may have been a .001@1KV or some 
> such. Next to CRT socket. Might have been a G2 cap. Going from memory.
> Phil Bader
>
> walter wood wrote:
>
> >Check R508, 22 ohms on crt board.
> >HTH
> >Walter
> >--- larry <schntv@xxxxxxxxxxxx> wrote:
> >
> >  
> >
> >>phillips 25b800, had no vertical,
> >>I cant seem to find a schematic of the crt board
> >>for this chassis.
> >>replaced vert ic,
> >>  rectifier, resistor,  2 electrolytics.
> >>comes on for 4 seconds then shutdown.
> >>too much screen drive.
> >>white with retrace.
> >>adjusting screen control is very sensitive.
> >>can a shorted vert. cause video damage?
> >>Thank you,
> >>Larry
> >>
> >>-- 
> >>Schneider TV & Electronic Inc.
> >>5415 N. Wooster ave.
> >>Dover, Ohio 44622      
> >>www.geocities.com/schntv2000/
> >>330-343-0768         FCC. first class & Extra
> >>class K8WLY
> >>
> >>
> >>
> >>    
> >>
>
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> >
> >
> >=====
> >Walter Wood                  
> >Future Tech Home Center        
> >2786 Hwy. 43 N.
> >Lawrenceburg Tn. 38464
> >931-829-3337
> >Fax 931-829-4044
> >mailto:wwood_38478@xxxxxxxxx
> >
>
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> >
>
> -- 
>
> Philip Bader
> Jan Phyl TV Inc. (estab. 1976)
> 3420 Recker Hwy. Winter Haven, Fl. 33880
> Fax (863) 299-8821
> email: tjanphyl@xxxxxxxxxxxxxxx
>
>
>
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[TechAssist] Re: Phillips 25B800 , shut down, need schematic

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