Zenith B27B40Z


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Zenith B27B40Z

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maverickr
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May 1, 2010, 8:38 PM

Post #1 of 10 (1396 views)
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Zenith B27B40Z	Can't Post

I have a busted flyback, pt# 95-4438-04, in this set. I found a replacement which was not the original zenith. Now when I power on the tv i can actually hear it as if its coming on and then it just shuts back down. When i push power again nothing happens but if I unplug and replug and then hit power it does as previously stated.I've troubleshooted and can't seem to find anything else wrong so I'm thinking that maybe this requires an original zenith flyback in order to work. Am I correct or could I be overlooking something here?

shadetree
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May 1, 2010, 11:36 PM

Post #2 of 10 (1391 views)
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Re: [maverickr] Zenith B27B40Z [In reply to]	Can't Post

THERE ARE 2 CAPS DIRECTLY BEHIND THE FLYBACK THAT CAUSE THIS TROUBLE

maverickr
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May 3, 2010, 6:40 PM

Post #3 of 10 (1376 views)
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Re: [shadetree] Zenith B27B40Z [In reply to]	Can't Post

Thanks. I see that they are 471 picofarad ceramic disc caps but I don't see a voltage rating. Can I replace with any voltage rating?

jts1957
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May 3, 2010, 8:57 PM

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Re: [maverickr] Zenith B27B40Z [In reply to]	Can't Post

2 or 3 kilovolt should suffice.

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Location: Far, Far Away

maverickr
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May 5, 2010, 8:10 PM

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Re: [jts1957] Zenith B27B40Z [In reply to]	Can't Post

thanks!

maverickr
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May 12, 2010, 1:21 AM

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Re: [jts1957] Zenith B27B40Z [In reply to]	Can't Post

Can i use 470pf to sub for 471pf? can't find 471pf anywhare.

jts1957
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May 12, 2010, 1:45 AM

Post #7 of 10 (1346 views)
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Re: [maverickr] Zenith B27B40Z [In reply to]	Can't Post

Would you like 47 dollars or 470 dollars?

That one digit makes a lot of difference. Wink

Edit: Examples:
2KV
http://search.digikey.com/...amp;name=445-2742-ND
3KV
http://search.digikey.com/...amp;name=445-2763-ND

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Location: Far, Far Away

(This post was edited by jts1957 on May 12, 2010, 1:53 AM)

maverickr
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May 14, 2010, 4:38 PM

Post #8 of 10 (1331 views)
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Re: [jts1957] Zenith B27B40Z [In reply to]	Can't Post

In Reply To

Would you like 47 dollars or 470 dollars?

That one digit makes a lot of difference. Wink

Edit: Examples:
2KV
http://search.digikey.com/...amp;name=445-2742-ND
3KV
http://search.digikey.com/...amp;name=445-2763-ND

thanks jt. so it is ok to use the 470pf?

jts1957
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May 14, 2010, 5:54 PM

Post #9 of 10 (1330 views)
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Re: [maverickr] Zenith B27B40Z [In reply to]	Can't Post

Would you like to be paid $47 (47pfd)

OR

Would you like to be paid $470 (470pfd)?

You can't be that dense - or can you? Crazy

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Location: Far, Far Away

mel
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May 16, 2010, 12:27 AM

Post #10 of 10 (1319 views)
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Re: [maverickr] Zenith B27B40Z [In reply to]	Can't Post

YES. I do not have the schematic of that exact model but one of a close number shows that as a 470pf 500v cap.

(This post was edited by mel on May 16, 2010, 12:44 AM)

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