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Crumbtrail TV Forums: TV Equipment: TV Repair Forum:
Zenith Tv dead, blown fuse, question

 
 


Jason B
New User

Nov 14, 2006, 10:36 AM

Post #1 of 8 (3051 views)
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Zenith Tv dead, blown fuse, question Can't Post
Have a 12 year old tv that all of a sudden made a pop sound is is fully dead. Opened up the back and the AGC glass fuse, 4amp 250 volts is blown... I have an some extra 3amp 250 volt fuses I found... Even-though the orignal was a 4amp, can I try the 3amp to test it?
This fuse is on the power supply board.
Thanks



MOtvGuy
User

Nov 14, 2006, 1:07 PM

Post #2 of 8 (3049 views)
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Re: [Jason B] Zenith Tv dead, blown fuse, question [In reply to] Can't Post
Something blew that fuse. Replacing it, even with the correct one will only see the fuse blow again, instantly.


shadetree
Veteran

Nov 14, 2006, 7:26 PM

Post #3 of 8 (3039 views)
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Re: [Jason B] Zenith Tv dead, blown fuse, question [In reply to] Can't Post
look in the middle of chassis for a 5 pin voltage regulator ic mounted on a metal heatsink if the small black transistor in front is blown apart you have a shorted picture tube if so junk iT THIS IS VERY COMMON IN THOSE SETS


Jason B
New User

Nov 14, 2006, 7:39 PM

Post #4 of 8 (3036 views)
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Re: [shadetree] Zenith Tv dead, blown fuse, question [In reply to] Can't Post
Thank you, but I'm not sure where to look. I just took this pic, maybe you can help me a little more.



The model TV is SM2722RK.


(This post was edited by Jason B on Nov 14, 2006, 7:39 PM)


Tiger62651
New User

Nov 14, 2006, 10:48 PM

Post #5 of 8 (3031 views)
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Re: [Jason B] Zenith Tv dead, blown fuse, question [In reply to] Can't Post
Well looking at the pic and his description its the only heat sink in the middle of the board. The heat sinks being the big metal C shaped attacked to components. If it has a black square attached to it and has 5 leads below it then thats the voltage regulator. A transistor has 3 leads coming out from the thing, so just look around that heat sink and look for a component that has 3 leads coming from the base. The leads should be clearly seen as transistors aren't mounted very close to boards.


gearguy
User

Nov 14, 2006, 10:56 PM

Post #6 of 8 (3029 views)
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Re: [Tiger62651] Zenith Tv dead, blown fuse, question [In reply to] Can't Post
What is the model of that TV?


Jason B
New User

Nov 15, 2006, 2:26 AM

Post #7 of 8 (3019 views)
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Re: [gearguy] Zenith Tv dead, blown fuse, question [In reply to] Can't Post
The model TV is SM2722RK


Jason B
New User

Nov 15, 2006, 6:40 AM

Post #8 of 8 (3013 views)
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Re: [Jason B] Zenith Tv dead, blown fuse, question [In reply to] Can't Post
UPDATE.

Well, I tried putting in a 3amp 250 volt fuse just to test it, (original fuse was a 4amp 250 volt). Slid the new glass fuse in, plugged the power cord in for about 2 seconds only, then smelled burning and saw the fuse turn BRIGHT RED!

Something else must be really messed up...

Drove to Sam's club and found a 32" flat JVC tube tv, on clearence for $259!!! Normally $400. Killer deal. So this will replace for now.




(This post was edited by Jason B on Nov 15, 2006, 6:41 AM)

 
 
 


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