[TechAssist] Re: RCA TV model no. F31221WN
- From: <tvservice@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 26 Feb 2004 08:31:51 -0600
C4104 is not 4.7mfd it should be 15mfd at least replace it with 22mfd
replace Q2906 with OEM or NTE159, 2SC2482 will work but lead configuration
is different.
If you have retrace lines the crt filaments have to be lit.
Robert
tvservice@xxxxxxxxxxxxx
H & H Electronics Inc
Dallas, TX
----- Original Message -----
From: "R & S ELECTRONICS" <RSELECT@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, February 25, 2004 8:33 PM
Subject: [TechAssist] Re: RCA TV model no. F31221WN
> Hi Phil
>
> Replaced original transister Q2906 and also cap C4104 (4.7mfd100v) the
> original sympton came back with retrace lines and sound was there,
wondering
> why the filament of picture tube not lit?
> High pitch squilling sound still there, as soon as u plug it, there is no
> high pitch sound but if you on the power switch than high pitch squilling
> comes on. Is this problem related to the video circuit or in the power
> supply?
> This is the 31" television.
> Thanks for replying
>
> Sunny
> R&S Electronics,PA
> Email:rselect@xxxxxxxxxxxx
> FAX/TEL"(717)532-6312
> ----- Original Message -----
> From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Wednesday, February 25, 2004 10:26 AM
> Subject: [TechAssist] Re: RCA TV model no. F31221WN
>
>
> > Hi'
> > You need to include the original threads so we can look it over and jog
> our memories on your problem. I think the model is a CTC169. Direct view?
> size?
> > Does the squeeling start when you plug it in, before turning it on?
> > If so, change the small 'lytics around the smps IC area for starters.
> > Phil
> >
> > R & S ELECTRONICS wrote:
> >
> > > Phil, replaced the old transister and still the set high pitch
squilling
> noise, noticed the filament doesnt lit but at the same time high voltage
is
> there. Do you think its the flyback causing this problem ?
> > > Pls let me know if you came across this set.
> > > Thanks for your help.
> > > Sunny
> > > R&S Electronics,PA
> > > TEL/FAX:(717)532-6312
> > > Email:rselect@xxxxxxxxxxxx
> > >
> >
>
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> > --
> >
> > Philip Bader
> > Jan Phyl TV Inc. (estab. 1976)
> > 3420 Recker Hwy. Winter Haven, Fl. 33880
> > Fax (863) 299-8821
> > email: tjanphyl@xxxxxxxxxxxxxxx
> >
> >
> >
> >
>
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