[TechAssist] Re: Magnavox Mod# PR3446-A106 (PTV515-AHO1) need help
- From: "Ron Miller d.b.a. Country TV" <rlmbkm@xxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 20 May 2004 20:36:02 -0500
R934 acts as a fuse for the most part also E-B bias.If Q901 gets hot fast
with no HV being developed the flyback or divider or even a crt may be at
fault.
Country TV
Ron Miller
Inez, TX. 77968
----- Original Message -----
From: "javiles6" <javiles6@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, May 20, 2004 11:23 PM
Subject: [TechAssist] Re: Magnavox Mod# PR3446-A106 (PTV515-AHO1) need help
> Jeff
>
> Thanks, I have already found Q901 and R934 faulty, all i`m waiting for is
to
> get the .33ohm resistor to try and see if this baby turns on. I have not
> rang the fly because i don`t have a fly tester, all i hope is the fly is
not
> the culprit of this problem. And just for testing purpose i try a .22ohms
> instead of the .33ohms and the HVOT got hot and there were no voltage
coming
> out of neither leg of the transistor. I wick out one leg of the resistor
and
> the voltage comes back up. What is the purpose of R934 in this ckt. Does
it
> have to be the correct ohms to trigger the HVOT. I don`t have the
schematic
> to study this ckt. Any ideas.
>
> Thanks
>
> Jose
> ----- Original Message -----
> From: "Intrepid Video Support" <support@xxxxxxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, May 20, 2004 12:43 PM
> Subject: [TechAssist] Re: Magnavox Mod# PR3446-A106 (PTV515-AHO1) need
help
>
>
> > Jose,
> > All I have..from Tech Repair CD:
> > Sylvania\SWR4620 PTV520-AH01\No high voltage. Audio
> OK\\\PTV520-AH01\Replaced shorted Q906 (2sd1556)*
> > Open R934 (.33 ohm) and fly (4835-1406-7128). Noticed a leaking lytic on
> the top edge of the same defl
> > board: C827 (1000/25V)\\\\\\\\
> >
> >
> > Jeff
> > --
> > Intrepid Video TV/VCR Repair
> > 263 S Front St, Steelton PA 17113
> > 717-939-7708; (F) 717-564-4952
> > www.intrepid-video.com www.tech-repair.net
> > ----- Original Message -----
> > From: "javiles6" <javiles6@xxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Thursday, May 20, 2004 3:40 AM
> > Subject: [TechAssist] Magnavox Mod# PR3446-A106 (PTV515-AHO1) need help
> >
> >
> > Hello Techs
> > This set came in yesterday with sound but no picture. Found HVOT
> shorted(D1556)(Q901) but before i install
> > the new one (2SD1556) i check the surrounding parts that connect to the
> transistor, D910, R961 and L903
> > and they check good. I also resolder the T901 just to make sure i have
no
> problem. Now the set have High
> > Voltage and the picture tubes filament are lighted but still have no
> picture. I also check the voltage on
> > the CRT ckt and is 225V on all three CRT resistors. Now i don`t have an
> high voltage probe so i don`t
> > know if the high voltage is reaching the picture tube anode. Does
someone
> have any idea or tips that can
> > help me with. I`m free to any suggestion.
> >
> > Thanks
> >
> > Jose
> >
> > Aviles Computer & TV Repairs
> > 508 Bingaman st
> > Reading, PA 19602
> > Tel # 610-478-1342
> >
>
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