[TechAssist] Re: SONY KV-27TS32
- From: "J Silverman" <greentron@xxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 1 Jul 2003 11:46:09 -0400
Depends on what the VDRs are. A variety of devices are called VDRs. The most
common are metal oxide varistors. Some are silicon carbide varistors. Some
are back-to-back power zeners. Even some devices containing gas tubes. Used
to be some germanium varistors. As far as the metal oxide varistors go, they
would change their characteristics depending on how many times they had to
conduct and how much energy they were forced to absorb. So they might start
conducting at a lower voltage than the original, or conduct some current at
a low voltage. Because of the none-linear conduction characteristics, not
fully testable with a VOM.
Jerry Silverman
Greentron Inc
4 Newland Ave
Greenville SC 29609
864 232 3889
Fax 271 2080
mailto:greentron@xxxxxxx
----- Original Message -----
From: "Kevin" <kevintv@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, July 01, 2003 3:40 AM
Subject: [TechAssist] Re: SONY KV-27TS32
> Jeff, why should all the VDR's be replaced? I have not done this and
> have never had any problems. Do you know what causes the VDR to fail?
> Thanks.
>
> Kevin Wilks
> Kevin's TV & Video Repair
> Penticton BC Canada
> kevintv@xxxxxxx
>
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Intrepid Video
> Support
> Sent: Monday, June 30, 2003 6:05 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: SONY KV-27TS32
>
> Medi,
> I've been told all the VDR's should be replaced. At their low price, it
> shouldn't break you, but maybe add
> reliability.
>
> Jeff Dougherty
> Intrepid Video TV/VCR
> 263 S Front St
> Steelton PA 17113
> fax...717-564-4952
> www.intrepid-video.com www.tech-repair.net
>
> ----- Original Message -----
> From: "Nova Service Center" <techassist@xxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Monday, June 30, 2003 4:32 PM
> Subject: [TechAssist] SONY KV-27TS32
>
>
> Hi Everyone
> The customer complaint was that the Sony TV ( Model # KV-27TS32 ) was
> dead . I found 2 regulators (
> 2sc4834 ) and horizontal output transistor ( 2sc4927 ) were short. Also
> .1 ohm resistor was open and VDR
> 601 was bad. replaced all tv turned on and worked for 10 minutes. The a
> big sound and all the parts except
> VDR 601 went bad again. The VDR 602 and 603 looks good.I don't know what
> I am missing . Any suggestion
> would be appreciated.
> Nova service Center
> 240-632-2994
> Medi
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