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Crumbtrail TV Forums: TV Equipment: TV Repair Forum:
JVC AV-36850

 
 


maverickr
User

Sep 8, 2007, 1:13 AM

Post #1 of 13 (1716 views)
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JVC AV-36850 Can't Post
This set, when power button is pressed, the relay would engage and then u would hear disengage and the set doesn't power on. Thought it might be a bad relay but i checked it out and its not. I did some troubleshooting in the horizintal section and the horizontal drive transformer (T521) seems suspect. I can't find a replacement anywhere tho, can somebody help?



rrobor
Veteran

Sep 8, 2007, 5:01 AM

Post #2 of 13 (1710 views)
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Re: [maverickr] JVC AV-36850 [In reply to] Can't Post
Horizontal drive transformers dry joint is common, actually being faulty is rare, check your findings very carefullybefore trying to find that. Also the set seems to want to close down, more likely to be the output than the drive.


RetiredTVguy2
User

Sep 9, 2007, 12:19 PM

Post #3 of 13 (1692 views)
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Re: [rrobor] JVC AV-36850 [In reply to] Can't Post
Yep! I concur, check that H.O.T.
[retired]
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When everyone treats you bad, turn to your dog, he or she will understand!
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I dont mind working, as long as it doesn't interfere with fishing!


maverickr
User

Sep 9, 2007, 8:41 PM

Post #4 of 13 (1685 views)
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Re: [RetiredTVguy2] JVC AV-36850 [In reply to] Can't Post
In Reply To
Yep! I concur, check that H.O.T.
[retired]


Paulpablo
Enthusiast

Sep 11, 2007, 7:52 PM

Post #5 of 13 (1663 views)
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Re: [maverickr] JVC AV-36850 [In reply to] Can't Post
Check or replace C926 (1000mfd@35v and C544 (100mfd@35v).


maverickr
User

Oct 6, 2007, 7:44 PM

Post #6 of 13 (1604 views)
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Re: [Paulpablo] JVC AV-36850 [In reply to] Can't Post
In Reply To
Check or replace C926 (1000mfd@35v and C544 (100mfd@35v).

(This post was edited by maverickr on Oct 9, 2007, 2:30 AM)


RetiredTVguy2
User

Oct 7, 2007, 11:35 AM

Post #7 of 13 (1593 views)
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Re: [maverickr] JVC AV-36850 [In reply to] Can't Post
Why is there a quoat but no text for an answer?
[retired]
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When everyone treats you bad, turn to your dog, he or she will understand!
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I dont mind working, as long as it doesn't interfere with fishing!


maverickr
User

Oct 9, 2007, 2:32 AM

Post #8 of 13 (1578 views)
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Re: [RetiredTVguy2] JVC AV-36850 [In reply to] Can't Post
i don't know why my replies are not being posted when i quote. But i was saying that the caps checked out ok and i'm still trying to find the problem with this set.


RetiredTVguy2
User

Oct 9, 2007, 12:21 PM

Post #9 of 13 (1571 views)
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Re: [maverickr] JVC AV-36850 [In reply to] Can't Post
Okey I suggest just reply instead of quoat.

I would first do what Paulpablo suggested, even if those caps "checked" good then just replace them. And how did the HOT check? Did you check that for short? And do you have a IHVT check meter? I would also check the IHVT.
[retired]
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When everyone treats you bad, turn to your dog, he or she will understand!
-----------------------------------------------------------
I dont mind working, as long as it doesn't interfere with fishing!


maverickr
User

Oct 10, 2007, 12:47 AM

Post #10 of 13 (1560 views)
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Re: [RetiredTVguy2] JVC AV-36850 [In reply to] Can't Post
No, unfortunately i don't currently have a IHVT meter. I will recheck the HOT for short but i think that cheked out ok as well. Ok, will replace the caps.


(This post was edited by maverickr on Oct 10, 2007, 12:48 AM)


RetiredTVguy2
User

Oct 10, 2007, 3:20 PM

Post #11 of 13 (1553 views)
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Re: [maverickr] JVC AV-36850 [In reply to] Can't Post
Ok, check that HOT and did you check for cold solder joints on that horz drive xfrmr as rob asked?
[retired]
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When everyone treats you bad, turn to your dog, he or she will understand!
-----------------------------------------------------------
I dont mind working, as long as it doesn't interfere with fishing!


maverickr
User

Oct 20, 2007, 7:33 PM

Post #12 of 13 (1523 views)
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Re: [RetiredTVguy2] JVC AV-36850 [In reply to] Can't Post
In Reply To
Ok, check that HOT and did you check for cold solder joints on that horz drive xfrmr as rob asked?
[retired]
 The HOT is ok. It's D2539 and has continuity between base and emitter but this is normal for this number. I changed the caps as paulpablo sugessted and checked for cold solder joints. Will report my results.


RetiredTVguy2
User

Oct 21, 2007, 5:04 PM

Post #13 of 13 (1513 views)
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Re: [maverickr] JVC AV-36850 [In reply to] Can't Post
Ok you say there is continuity between B&E, Im assuming you checked it out of circuit. when you say continuity do you mean full deflection? Low ohms? High ohms? What about E to B and C to E and C to B and reverse of those? There should be infinity in there some where.
If your getting full deflection B to E and E to B then I would suspect it is shorted. There should be low ohms there.
[retired]
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When everyone treats you bad, turn to your dog, he or she will understand!
-----------------------------------------------------------
I dont mind working, as long as it doesn't interfere with fishing!

 
 
 


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