[TechAssist] Re: Toshiba TV model CE36G18

Jim, you may be right. If I put a load in series with HOT collector 10ohm
microcontrol will not shut down relay. If 4ohm relay will shut down. If 5ohm
high voltage will be on without problem.I must look for print.
Thank Jim
Dang    www.tvcrcomputers.com
----- Original Message -----
From: "Jim Myers" <jr.myers@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, June 28, 2002 2:45 PM
Subject: [TechAssist] Re: Toshiba TV model CE36G18


>
> Dang, you're going to need a print and I don't have one but from your
> description of what is happening there must be a problem with the x-ray
> protection shutdown circuit which is a sample of the high voltage from the
> flyback, normally from the filament winding, which is rectified and sent
> back to the jungle IC and kills the horiz drive if it goes too high.
> Whatever voltage there is after the rectifier is normally then dropped
> across a zener and a resistor or two so the result at the x-ray input pin
> should be darn near 0 volts, the zener could be bad or the IC could be
bad.
> This is assuming the B+ in not too high and I expect 127 volts is ok.
Maybe
> you can trace it out the hard way without a print.
> Jim Myers
> Telrad Electronic Services Co.
> Fort Wayne, IN 46815
> jr.myers@xxxxxxxxxxx
> 260-432-4486 Fax and Voice
> Fax is always on
> ----- Original Message -----
> From: "Tomlee" <t8872695@xxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, June 28, 2002 4:24 PM
> Subject: [TechAssist] Re: Toshiba TV model CE36G18
>
>
>
> More information.
> Tv shuts down If HOT is active. If colector of HOT is removed
microcontroler
> will not turn relay off.If I reconect HOT colector and
>  I jump the relay. The Hot is active and High voltage is on and It does
not
> show any high curent.
> I wonder why shut down?  B+  is 127v  Is it low?
> Dang
> www.tvcrcomputers.com
> ----- Original Message -----
> From: "Tomlee" <t8872695@xxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, June 28, 2002 11:21 AM
> Subject: [TechAssist] Toshiba TV model CE36G18
>
>
> >
> > Hello techs.
> > I am working with Toshiba 36" . Customer said some how The house get
210V
> > line. Some equipments blow up.
> > I will work more but he wants the TV service first.
> > I open and see fuse line 120v blown, D899 MOV (surge
> > protect) blown.Change the fuse and turn on the tv. The
> > relay on then off. Remove collector of HOT. The relay will stay on if
turn
> > on tv . B+ is 126V .Is it low?.It has 18v
> > and 126v at the at secondary of tranfomer power supply.
> > The LED blinks at relay turn on and off.The LED stays lit
> > If I remove HOT collector because relay keep contacted.
> > I do not have print of this.May be I do not have horizontal
> > drive ?TV miss voltage for jungle iC?
> > Any IDEAs  is appriciated.
> > Dang
> > www.tvcrcomputers.com
> >
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