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

  • From: "Ed Gaidies" <teltek3@xxxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Fri, 10 Jun 2005 20:55:08 -0400

Either you used a poor sub (D518)...or CRT is your problem.
(Intermittent).
May want to take Bob's suggestion and go with his Part Number (OEM),
since I see it has been subbed to another.

Changing Diode and Resistor has always solved my KV-27TS30/32 problems.

-Ed-

Tel-Tek Electronics
Ontario-Canada
 
teltek3@xxxxxxxxxxxx
teltek@xxxxxxxxx

-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Kevin's TV Repair
Sent: Friday, June 10, 2005 5:58 PM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: NOT FIXED, Sony KV-27TS30, why would R587
open?

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?  

Kevin Wilks
Kevin's TV Repair
Penticton BC Canada 
kevintv@xxxxxxx


-----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?

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.  

Kevin Wilks
Kevin's TV Repair
Penticton BC Canada 
kevintv@xxxxxxx


-----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?

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.

Tony Saracco
TCS ELECTRONICS
406 Andra Ct.
Gilberts, IL 60136
tcselectronics@xxxxxxxxx

----- 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?


> 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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