[TechAssist] Re: Magnavox Mod# PR3446-A106 (PTV515-AHO1) need help
- From: "javiles6" <javiles6@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 24 May 2004 12:14:32 -0700
Peggs
I found the # is a EMF502 but tri-state will only repair my old module for
$149.00 + S/H. On the other hand PTS have one but they want $217.99 for it
but the customer decline to pay too much for it. My suggestion was to get
the flyback and all the other parts that i need and do the repair myself.
Don`t forget that after i get the set running i will need to do the CRT
coolant so customer agree to pay no more than $350.00 for the repair. Now
what i need is a source to get the flyback at a reasonable price, tritronics
has it for too much and Mat Electronics does not show it in their catalogs.
Any ideas where to get it. Your help is always appreciated.
Thanks
Jose
----- Original Message -----
From: "peggs" <peggs@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>; <techassist@xxxxxxxxxxxxx>
Sent: Monday, May 24, 2004 8:29 AM
Subject: [TechAssist] Re: Magnavox Mod# PR3446-A106 (PTV515-AHO1) need help
> I don't know,but the board should be marked with something like
> APW015 or similar
>
> Peggs
>
> At 05:11 PM 5/21/04, javiles6 wrote:
> >Peggs
> >
> >What is the module # for this set. Tri-state does not have it listed by
> >chassis #
> >
> >Thanks
> >
> >Jose
> >----- Original Message -----
> >From: "peggs" <peggs@xxxxxxxxxxxxx>
> >To: <techassist@xxxxxxxxxxxxx>; <techassist@xxxxxxxxxxxxx>
> >Sent: Friday, May 21, 2004 12:17 PM
> >Subject: [TechAssist] Re: Magnavox Mod# PR3446-A106 (PTV515-AHO1) need
help
> >
> >
> > > If it's not the Picture tube(blue usually),nor the HV Splitter,the
> > > Module can probably be replace for around $100.00 exchange.
> > > Remember the Blue and Green pix tube coolants will need to be
exchanged
> > >
> > > Peggs
> > >
> > > At 10:07 AM 5/21/04, Ron Miller d.b.a. Country TV wrote:
> > > >Do you have a O'scope?Have you looked at the base and C. waveforms?
> > > > If the base is distorted or low you have a drive problem, if the
> >C.waveform
> > > >has ringing in it or is distorted you have a flyback ,timing cap or
> > > >distribution block problem.hth
> > > >Country TV
> > > >Ron Miller
> > > >Inez, TX. 77968
> > > >
> > > >----- Original Message -----
> > > >From: "javiles6" <javiles6@xxxxxxxxxxx>
> > > >To: <techassist@xxxxxxxxxxxxx>
> > > >Sent: Friday, May 21, 2004 2:50 PM
> > > >Subject: [TechAssist] Re: Magnavox Mod# PR3446-A106 (PTV515-AHO1)
need
> >help
> > > >
> > > >
> > > > > Damon
> > > > >
> > > > > First of all, thanks for this info. Yes the HOT is an original
D1556
> >but
> > > > > right now while bringing up the screen voltage the resistor open
> >again.
> > > >Also
> > > > > i did what you say in your post to remove the CRT board and
monitor
> >the
> > > >heat
> > > > > level but the HOT was still getting hot. So the CRT is not the
issue
> >here.
> > > >I
> > > > > might have a bad flyback. Now before the resistor open the
voltages on
> >the
> > > > > HVOT was C=130V, B=7V and E=2V can someone confirm this voltage
for
> >me. I
> > > > > don`t have the schematic and i`ll sure appreciate if anybody will
> >e-mail
> > > >the
> > > > > horizontal section.
> > > > >
> > > > > Thanks
> > > > >
> > > > > Jose
> > > > > ----- Original Message -----
> > > > > From: "Damon" <damon101@xxxxxxxxxxxxxx>
> > > > > To: "TechAssist" <techassist@xxxxxxxxxxxxx>
> > > > > Sent: Friday, May 21, 2004 6:07 AM
> > > > > Subject: [TechAssist] Re: Magnavox Mod# PR3446-A106 (PTV515-AHO1)
need
> > > >help
> > > > >
> > > > >
> > > > > > Jose,
> > > > > >
> > > > > > The 0.33 ohm resistor is on the emitter side of the HOT, if it's
> >getting
> > > > > hot
> > > > > > but staying alive, you may have a short in the IHVT, but my
> >experience
> > > >has
> > > > > > also seen the HV caps go off value too....I don't think the
> >resistance
> > > > > would
> > > > > > affect it that much being on the emitter to ground path, it
> >literally is
> > > >a
> > > > > > fuse for the 130v supply And remember, the HOT operates as a
> > > >switch...the
> > > > > > 0.22 ohm doesn't affect the "switching parameters" of the
> >Transistor.
> > > >Are
> > > > > > you using the original HOT....not a sub??? I think that's
critical
> >on
> > > >this
> > > > > > unit if I remember correctly...
> > > > > >
> > > > > > Even though this is an earlier model than the ones that crack
the
> >crt's
> > > >,
> > > > > I
> > > > > > think it would be wise to monitor the heat level of the HOT with
the
> >crt
> > > > > > boards disconnected just to make sure you're not feeding a
shorted
> > > >crt....
> > > > > >
> > > > > > >From the looks of the postings, it looks like your Tv should be
> > > > > operational,
> > > > > > so you may be spending TOO MUCH TIME on this "HOT is hot" issue,
> > > > > especially
> > > > > > since 2sd1556 can easily be substituted by the HEFTIER 2sd1878
or
> > > > > > 79....there's a lot more than these two....I think they are 60
> >watters.
> > > > > >
> > > > > > You have an issue with video shutdown here, since you've scoped
the
> > > > > vertical
> > > > > > output, I can't immediately think of anything else.....or have
you
> > > >scoped
> > > > > > the vertical??
> > > > > >
> > > > > > Damon Brunger
> > > > > > Telrad Electronic Services
> > > > > > Ft Wayne, IN 46815
> > > > > > ----- Original Message -----
> > > > > > From: "javiles6" <javiles6@xxxxxxxxxxx>
> > > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > > Sent: Friday, May 21, 2004 2:58 AM
> > > > > > Subject: [TechAssist] Re: Magnavox Mod# PR3446-A106
(PTV515-AHO1)
> >need
> > > > > help
> > > > > >
> > > > > >
> > > > > > | Jeff
> > > > > > |
> > > > > > | I did increase the screen voltage but did not see any line. I
also
> > > >check
> > > > > > | C827 and is good. But my question is although the resistor i
> >replace
> > > >was
> > > > > > | lower in ohms than the original the set was suppose to whether
> >blow
> > > >the
> > > > > > | HVOT, open the resistor or work, but neither of the three
happen.
> >The
> > > > > HVOT
> > > > > > | was not firing, instead it was getting hot. To me i think that
you
> > > >must
> > > > > > put
> > > > > > | the right resistor in order for the HVOT to work. Anyway
tomorrow
> >i
> > > >will
> > > > > > get
> > > > > > | one and let you know what happen. Thanks
> > > > > > |
> > > > > > | Jose
> > > > > > |
> > > > > > | ----- Original Message -----
> > > > > > | From: "Intrepid Video Support" <support@xxxxxxxxxxxxxxxxxx>
> > > > > > | To: <techassist@xxxxxxxxxxxxx>
> > > > > > | Sent: Thursday, May 20, 2004 7:02 PM
> > > > > > | Subject: [TechAssist] Re: Magnavox Mod# PR3446-A106
(PTV515-AHO1)
> >need
> > > > > > help
> > > > > > |
> > > > > > |
> > > > > > | > Try increasing the screen control to rule out a vertical
> >problem.
> > > > > > | > you have to be able to look while you do this, if there is
> >vertical
> > > > > > | collapse, it won't take long for the
> > > > > > | > line to etch the CRT's.
> > > > > > | > There was a capacitor listed in the tip I sent you, did you
> >check
> > > > > that?
> > > > > > | >
> > > > > > | > 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: Friday, May 21, 2004 12:23 AM
> > > > > > | > 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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