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Post by mastertech on Aug 24, 2015 22:00:46 GMT -5
The primary of the transformer is OPEN..... You have verified the primary is open with your DMM? If so, then yes, there is a fuse in that primary. Cut and peel back some of the tape and you should find it. Just be careful of the winding wire. It is quite thin. |
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Post by dolivas27 on Aug 24, 2015 22:07:28 GMT -5
Yes open with DMM. There is a copper band around the yellow tape it is OK to cut that?
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Post by mastertech on Aug 24, 2015 22:14:34 GMT -5
Yes, you can cut it if you cannot unwrap it.. After you replace the fuse just tape everything back together.
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Post by dolivas27 on Aug 24, 2015 22:20:55 GMT -5
Well I removed the Copper band and the yellow tape but the thermal fuse is in the center of the transformer. I might be able to break some of the plastic teeth to get to it?
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Post by mastertech on Aug 24, 2015 22:26:23 GMT -5
Are the wires going to the fuse accessible? I have had some like that and i just cut the wires going to the fuse and left it there and just put another fuse behind the tape. Of course test if the fuse is blown also if you can.
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Post by dolivas27 on Aug 24, 2015 22:36:27 GMT -5
No it's down in the center of the transformer.   |
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Post by mastertech on Aug 24, 2015 22:44:06 GMT -5
You can break those plastic tabs off if it helps to dig it out. Are those the wires to the fuse that have the black wire covering on them in the top pic?
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Post by dolivas27 on Aug 24, 2015 22:49:14 GMT -5
Yes here is a better picture of the top.  |
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Post by dolivas27 on Aug 24, 2015 23:14:11 GMT -5
Well that was a pain in the ASS to get out! I got it out and don't think I ruined anything here's a picture of it and it's open. I will order one and see if the repair works. The leads on that thing were damn strong.   |
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Post by mastertech on Aug 24, 2015 23:19:21 GMT -5
Great! Keep us updated.
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Post by dolivas27 on Aug 24, 2015 23:27:31 GMT -5
Great can't find a replacement any suggestion?
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Post by mastertech on Aug 25, 2015 0:25:11 GMT -5
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Post by dolivas27 on Sept 2, 2015 0:20:25 GMT -5
Fixed I replaced the transformer from another unit that I received in for scrap. I might still fix the old transformer but the cost of the thermal fuse from Newark with shipping was crazy.
Thanks again for all the help.
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Post by mastertech on Sept 2, 2015 9:30:33 GMT -5
Good job. Yeah, just wait and get some when you have to order other stuff. You will need more as time goes on.
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Onkyo
New Member
Posts: 3 
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Post by Onkyo on Jul 30, 2017 3:15:23 GMT -5
Hello guys, I just got one 636 receiver with the same behaviour and I would like to ask if anyone saw this type of repair, looks like the repair was done by someone who knew very well what's there, probably service centre. I've attached one picture with the board. Thank's in advance.  |
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