[TechAssist] Re: NOT FIXED, Sony KV-27TS30, why would R587 open?

  • From: "J. Knoll" <jaystv@xxxxxxxxx>
  • To: techassist@xxxxxxxxxxxxx
  • Date: Fri, 10 Jun 2005 18:18:43 -0400

D518 RGP02-17  NTE525
I don't know where the Ecg 580 came from but I don't think it is
correct. For best results on any Sony use only Sony Parts. I sure
learned this the hard way.
Jay

On 6/10/05, Kevin's TV Repair <kevintv@xxxxxxx> wrote:
> I thought this set was fixed.  But it only lasted a few minutes and R587
> opened up again.  I replaced D518 with an ECG580 not touching the board.
> Is this an acceptable replacement?
>=20
> Kevin Wilks
> Kevin's TV Repair
> Penticton BC Canada
> kevintv@xxxxxxx
>=20
>=20
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Kevin's TV Repair
> Sent: Thursday, June 09, 2005 12:26 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: FIXED, Sony KV-27TS30, why would R587 open?
>=20
> Thanks for all who replied.  I did find 2 black marks under D518.
> Replacing it and R587 repaired this set.  What causes the burn marks?
> Is there a partial short along the length of the diode on the outside
> which causes this?  Thanks.
>=20
> Kevin Wilks
> Kevin's TV Repair
> Penticton BC Canada
> kevintv@xxxxxxx
>=20
>=20
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Tony S
> Sent: Thursday, June 09, 2005 6:03 AM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: Sony KV-27TS30, why would R587 open?
>=20
> Kevin, this was common back then, replace resistor and the 1000v
> rectifier
> diode as well, it shorts under load. If you remove the diode you will
> usually see a burn spot under diode.
>=20
> Tony Saracco
> TCS ELECTRONICS
> 406 Andra Ct.
> Gilberts, IL 60136
> tcselectronics@xxxxxxxxx
>=20
> ----- Original Message -----
> From: "Kevin's TV Repair" <kevintv@xxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, June 09, 2005 12:55 AM
> Subject: [TechAssist] Sony KV-27TS30, why would R587 open?
>=20
>=20
> > Set came in with dark, red picture.  Picture tube tested good with my
> > B&K.  I then found only 178 volts at G2.  I traced G2 (1000 volt line)
> > back to an open, "browned" R587, a 1.8K 1 watt resistor.  I was
> > wondering if it was a common fault for this resistor to turn brown in
> > the center and go open, or is the fly back or picture tube at fault?
> > Thanks.
> >
> > Kevin Wilks
> > Kevin's TV Repair
> > Penticton BC Canada
> > kevintv@xxxxxxx
> >
> >
> >
> >
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J. Knoll  TechAssist Monitor
TechAssist
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