[TechAssist] Re: Toshiba 36AF42 picture tube ringing
- From: <tvservice@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 26 Jan 2004 15:54:48 -0600
Toshiba Technical Dept agrees that it is the CRT they have seen several 27"
CRT's with this complaint and only a couple 32"
Also adjusting the horizontal width had no effect on the ringing
That was the only question he asked me.
Robert
tvservice@xxxxxxxxxxxxx
H & H Electronics Inc
Dallas, TX
----- Original Message -----
From: <tvservice@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, January 26, 2004 3:20 PM
Subject: [TechAssist] Re: Toshiba 36AF42 picture tube ringing
> When decrease G2 to minimum brightness the ringing changes pitch
> slightly higher pitched. Cannot make stop after it starts ringing.
>
> Robert
> tvservice@xxxxxxxxxxxxx
> H & H Electronics Inc
> Dallas, TX
>
> ----- Original Message -----
> From: <greentron@xxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Cc: <tvservice@xxxxxxxxxxxxx>; <techassist@xxxxxxxxxxxxx>
> Sent: Monday, January 26, 2004 2:57 PM
> Subject: [TechAssist] Re: Toshiba 36AF42 picture tube ringing
>
>
> > Maybe a weld on a shadow mask support has broken and the electron beam
is
> > exciting a mechanical vibration. Blank the raster with the screen
voltage
> > adjustment while it is ringing and see if it stops.
> > J Silverman
> > > Yes
> > > but I don't believe the yoke is the cause
> > > Robert
> > > tvservice@xxxxxxxxxxxxx
> > > H & H Electronics Inc
> > > Dallas, TX
> > >
> > > ----- Original Message -----
> > > From: "peggs" <peggs@xxxxxxxxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>; "Tech-Assist"
<techassist@xxxxxxxxxxxxx>
> > > Sent: Monday, January 26, 2004 2:19 PM
> > > Subject: [TechAssist] Re: Toshiba 36AF42 picture tube ringing
> > >
> > >
> > > > Is the Yoke removable ???
> > > >
> > > > Peggs
> > > >
> > > > At 10:09 AM 1/26/04, tvservice@xxxxxxxxxxxxx wrote:
> > > > >Here's one for you
> > > > >I am looking at this set for intermittent hi pitch squeel
> > > > >after several hours finally began ringing/squeeling.
> > > > >the sound is coming from the bell of the crt.
> > > > >I have disconnected degaussing coil and horizontal shift coil with
no
> > > > >change.
> > > > >Slapping on the crt seems to have no effect other than slight
purity
> > > drift
> > > > >(shadowmask)
> > > > >When remove the antenna ringing gets louder.
> > > > >Flexing the board and coils and components in horizontal section
have
> no
> > > > >effect either.
> > > > >Before I replace the CRT has anyone else heard or seen this?
> > > > >The CRT is A80JZ90X01 Toshiba on the label
> > > > >
> > > > >Robert
> > > > >tvservice@xxxxxxxxxxxxx
> > > > >H & H Electronics Inc
> > > > >Dallas, TX
> > > > >
> > > >
> > >
>
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