[TechAssist] Re: Philips PTV630 HV transistor shorted
- From: "Ron Miller" <rlmbkm@xxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 26 Sep 2002 08:48:52 -0500
.33 ohm 1/2 watt from emitter to ground,it is on other side of HOT
heatsink.You also most likely have cracked blue tube.HTH.
Country TV
Ron Miller
484 FM444 S.
Inez,TX 77968-5002
V.(361)782-6419. F.(361)782-9149
e-mail: rlmbkm@xxxxxxxx
----- Original Message -----
From: "Neil Bowman" <tvdoctors@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, September 25, 2002 9:47 PM
Subject: [TechAssist] Re: Philips PTV630 HV transistor shorted
>
> There is a remitter resistor between the base and collector. You will
> probably see that it's blackened on the side of it. Before replacing, look
> directly into the blue crt and you will probably see that it's cracked.
> Neil TV Doctors Monroe,Wa.
>
> -------Original Message-------
>
> From: techassist@xxxxxxxxxxxxx
> Date: Wednesday, September 25, 2002 07:26:42 PM
> To: tech assist
> Subject: [TechAssist] Philips PTV630 HV transistor shorted
>
> Could use a bit of info on this PTV630 philips. Don't see many because
> there isn't a philips dealer in this area.
>
> The high voltage O/P transistor is shorted. All power supply voltages
> appear normal, deflection aand audio is working.
>
> Question: there is 130V on the collector of the HV transistor 2DS1556
> which is shorted so there must be a fuse or fuse resistor somewhere in
> the emitter line, could someone tell me the location and value of the
> fusable.
> Found tips on ptv620 and a .0019uf cap was mentioned as possible cause
> and to check the blue crt, does this apply to the 630 as well?
>
> Any suggestions welcome, may save an extra trip as I have to work on
> this on site.
>
> Al G
> Al's TV-Electronics
> Pembroke Ont.
> Canada
> 613-732-3240
>
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