Riddled TV Repair Forum
Service Menu and Manual Schematics
 
   
 FAQFAQ   SearchSearch   RegisterRegister 
   Log inLog in 
Wirewound Resistors    
Post new topic   Reply to topic    Riddled TV Repair Forum Index -> TV Repair
 
Author Message
GBertolet



Joined: 25 Jun 2011
Posts: 25
Location: Pennsylvania

PostPosted: Wed Aug 01, 2012 2:36 pm    Post subject: Wirewound Resistors Reply with quote

In troubleshooting my tv set I noticed that many of the voltages were higher than what was on the schematics. I measured several of the wirewound resistors on the circuit boards, and they were all at, or near zero ohms resistance. Their values originally ranged from 2 to 100 ohms. Their physical sizes varied from 5 to 15 watt. Is it common for these type of resistors to change like this?
Google

PostPost subject: Advertisement

kuhurdler



Joined: 28 Dec 2006
Posts: 2862
Location: Overland Park, KS

PostPosted: Thu Aug 02, 2012 7:06 am    Post subject: Reply with quote

I'd suggest lifting one end of the resistors and measuring to confirm.
GBertolet



Joined: 25 Jun 2011
Posts: 25
Location: Pennsylvania

PostPosted: Thu Aug 02, 2012 8:13 am    Post subject: Reply with quote

I have already done that.
JTS1957



Joined: 21 Jan 2009
Posts: 2344
Location: Far, Far Away

PostPosted: Thu Aug 02, 2012 10:35 am    Post subject: Reply with quote

GBertolet wrote:
2 to 100 ohms


Not a large voltage drop across such low value resistors.

IF you have a 100 ohm resistor that reads (out of circuit) lower than 80 ohms or higher than 120, replace it.
GBertolet



Joined: 25 Jun 2011
Posts: 25
Location: Pennsylvania

PostPosted: Thu Aug 02, 2012 11:18 am    Post subject: Reply with quote

Everyone of the wirewound resistors I removed from the circuit to test, reads 0 ohms.
Google

PostPost subject: Advertisement

JTS1957



Joined: 21 Jan 2009
Posts: 2344
Location: Far, Far Away

PostPosted: Thu Aug 02, 2012 3:33 pm    Post subject: Reply with quote

Meter and correct setting?

For example, a DVM set on 'diode test' WILL give zero reading for all small value resistors.
GBertolet



Joined: 25 Jun 2011
Posts: 25
Location: Pennsylvania

PostPosted: Thu Aug 02, 2012 6:39 pm    Post subject: Reply with quote

I borrowed another meter, and got closer to advertised readings on the resistors. Thanks for the help. My increased voltage problem on my tv set lies somewhere else then.
Display posts from previous:   
Post new topic   Reply to topic    Riddled TV Repair Forum Index -> TV Repair All times are GMT - 6 Hours
Page 1 of 1

 


Disclaimer: All information provided by RiddledTV is strictly for information purposes only. Please observe all warnings displayed on your electronic
devices. This information should only be used to help diagnose work, and all service should be performed by a qualified technician.
Contact Us       Privacy Policy       Copyright © 2015 RiddledTV.com       Advertise on RiddedTV.com