[TechAssist] Re: SONY TV VERTICAL NOT FULL
- From: "J Silverman" <greentron@xxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 9 Jan 2002 14:43:20 -0500
The ringing test is patented by Sencore and is incorporated in a variety of
their test equipment.
Jerry Silverman
Greentron Inc
4 Newland Ave
Greenville SC 29609
864 232 3889
Fax 271 2080
mailto:greentron@xxxxxxx
----- Original Message -----
From: "VRM" <vrmsys@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, January 09, 2002 1:26 PM
Subject: [TechAssist] Re: SONY TV VERTICAL NOT FULL
>
> Hello,
>
> Please which voltage are you talking about? Is it the supply voltage for
the
> chip? If it is, then the voltage imprinted on the circuit board for the
> Vertical IC is +- 25VDC, and am measuring just about that, i.e.+-24.3V.
>
> I have a generic application schematic diagram from the CHIP
manufacturers,
> ST Microelectronics and the parameters stated, conforms to the design from
> SONY.
>
> May I know the voltage in question for me try my hands on once again. How
do
> I go about with the RINGING TEST, please help by giving me the STEPS.
>
> Thanks very much for the information. Hope to hear from you soon.
>
> Viktoria
>
> ----- Original Message -----
> From: "J Silverman" <greentron@xxxxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Tuesday, January 08, 2002 5:57 PM
> Subject: [TechAssist] Re: SONY TV VERTICAL NOT FULL
>
>
> >
> > The voltage to the vertical IC may be low due to a problem with the FBT
or
> > one of its loads or the HOT drive. Another possibility is a short in the
> > yoke. You could tell with a ringing test.
> > Jerry Silverman
> > Greentron Inc
> > 4 Newland Ave
> > Greenville SC 29609
> > 864 232 3889
> > Fax 271 2080
> > mailto:greentron@xxxxxxx
> > ----- Original Message -----
> > From: "VRM" <vrmsys@xxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Tuesday, January 08, 2002 7:08 AM
> > Subject: [TechAssist] Re: SONY TV VERTICAL NOT FULL
> >
> >
> > >
> > > Hello;
> > >
> > > Thanks for the reply. The PICTURE is NEITHER compressed NOR CUTOFF at
> the
> > > TOP and BOTTOM, but just that it does not FULLY FILL the screen. Also
> the
> > > VERTICAL Deflection IC warms up too quickly (i.e. Temperature
Increases
> > > Exponentially) at power up. I appreciate all the help you are
providing.
> > >
> > > Actually, the SET was brought in having a BURNT (SHORTED) HORIZONTAL
> > > Transistor, and then after REPAIRS, the problem was detected. I asked
> the
> > > owner whether he has seen the SET behave that way before, he said
> > > occasionally it has been that way (FULL or SEMI FULL Screen), before
it
> > > finally went down.
> > >
> > > Hope to hear from you soon.
> > >
> > > Thanks
> > >
> > > Viktoria
> > >
> > >
> > > ----- Original Message -----
> > > From: "Dennis Viereck" <wa6ati@xxxxxxxxxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Monday, January 07, 2002 7:27 PM
> > > Subject: [TechAssist] Re: SONY TV VERTICAL NOT FULL
> > >
> > >
> > > >
> > > > Is the picture compressed at the top and bottom or cut off at top
and
> > > bottom?
> > > > Dennis
> > > >
> > > > VRM wrote:
> > > >
> > > > > Hello;
> > > > >
> > > > > It is JUST the TOP and DOWN. I have good signal RECEPTION. The
> IMAGES
> > > are
> > > > > complete, i.e FULL image displayed, BUT my problem is TOP and DOWN
> > > picture
> > > > > shortage.
> > > > >
> > > > > Thanks
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "al m" <ampm@xxxxxxx>
> > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > Sent: Monday, January 07, 2002 5:48 PM
> > > > > Subject: [TechAssist] Re: SONY TV VERTICAL NOT FULL
> > > > >
> > > > > >
> > > > > > are you saying the whole picture is small or just the top and
> bottom
> > > > > > al marquardt
> > > > > > ampm@xxxxxxx
> > > > > > ----- Original Message -----
> > > > > > From: "VRM" <vrmsys@xxxxxxxxxxxx>
> > > > > > To: <Techassist@xxxxxxxxxxxxx>
> > > > > > Sent: Monday, January 07, 2002 10:47 AM
> > > > > > Subject: [TechAssist] SONY TV VERTICAL NOT FULL
> > > > > >
> > > > > >
> > > > > > > Hello;
> > > > > > >
> > > > > > > I will be very pleased if someone can help me repair this SONY
> TV
> > > with a
> > > > > > vertical deflection Problem.
> > > > > > >
> > > > > > > The SET is a SONY 29 inch with MODEL number KV-29MF1, which
> powers
> > > up
> > > > > > well, but having a vertical deflection (Picture)
covering/centered
> > > around
> > > > > > 80% of the screen. The SET has a vertical deflection booster IC
> > > TDA9379,
> > > > > > which I suspected to be faulty and changed it, in addition to
all
> > > > > > electrolytic capacitors located in the vertical deflection
> section -
> > > i.e.
> > > > > a
> > > > > > valuable suggestion from response from a TECH ASSIST reply.
> > > > > > >
> > > > > > > The fault is still not repaired, aside that, the Vertical IC
> warms
> > > up
> > > > > > INCREASINGLY at power up. Actaully I don't have a schematic
> diagram
> > > for
> > > > > this
> > > > > > SET.
> > > > > > >
> > > > > > > Would someone be willing to provide suggestions or ideas as to
> > what
> > > next
> > > > > I
> > > > > > can touch to help solve this problem.
> > > > > > >
> > > > > > > WISHING YOU ALL the BEST OF the SEASON - Thanks a lot.
> > > > > > >
> > > > > > > Viktoria
> > > > > > >
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