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

  • From: walter wood <wwood_38478@xxxxxxxxx>
  • To: techassist@xxxxxxxxxxxxx
  • Date: Mon, 9 Aug 2004 14:36:36 -0700 (PDT)

C447 will cause the replacement Vert ic to fail.
Also look at(if you haven't);
C461
R420
D409
D445
And R384 smd on main chassis.
Sounds like the CRT might be suspect too, as the
200v is there with the crt socket removed.
Could also be flyback.
HTH
Walter
--- larry <schntv@xxxxxxxxxxxx> wrote:

> the 22 ohm is ok and i have 200 volts when i pull
> the crt 
> socket. but only 135 when crt screen is turned
> up.
>   , i cant help but think this is related to the
> vertical 
> trouble originally.
> Thank you all,
> Larry
> 
> 
> al m wrote:
> > Check R460 and D460 and R58 or 508 on CRT board
> 22ohm resistor.
> > Al Marquardt
> > ampm@xxxxxxx
> > Al Marquardt Electronic Repair
> > 206 W Main
> > Girardville Pa. 17935
> > ----- Original Message ----- 
> > From: "larry" <schntv@xxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Monday, August 09, 2004 4:38 PM
> > Subject: [TechAssist] Phillips 25B800 , shut
> down, need schematic
> > 
> > 
> > 
> >>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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> -- 
> 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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