HELP, Denon transformer

ryley_999 · 15th November 2011, 02:08 AM

i need some help, im not even sure if im posting this in the right area, but my avr-1800 transformer is dead, the primary coil has no continuity, and i searched online to buy a new one, ive only found 2 places, one place is out of stock and the other one doesn't ship to canada, could some one possibly let know if there is a place somewhere in canada or a places in the states that will ship it to canada, would be greatly appreciated, thx

! · 16th November 2011, 03:46 AM

I don't know of any, but if you're willing to take the outer wrapper off the primary windings, you might find it just has a blown thermal fuse that needs replaced... it's fairly likely, but if the windings look burnt or plastic melted, definitely replace the transformer. While the fuse's original purpose is to prevent excessive transformer overheating, after a while, enough thermal cycles, they will fail without even reaching their original threshold temperature and fail also to reset after cooling down.

Otherwise, if you can determine the # of windings and output voltage for each with roughly the same or more current capability where it matters, you might be able to find a *generic*/other-manufacturer replacement transformer.

ryley_999 · 16th November 2011, 02:15 PM

well i have taking off everything on the outside of the transformer and i don't see any thermal fuse, unless im supposed to start taking apart the core? also ive looked online for a few days now trying to find the voltages of this transformer and i couldn't find anything, i found a services manual and i couldn't even find anything in there,

ryley_999 · 21st November 2011, 04:11 PM

after a while of scoping threw the repair manual for this receiver i have managed to get the voltages of the lines from the transformer after they have been converted to dc, the voltages are, 10.5, 12.5 , 21 , 33, and 57, now i remember u gain a little bit of voltage from the rectifying process, so im assuming the actual voltages of the ac lines off the transformer is a little lower, is there a formula or something i can use to figure out what the voltage were when they were ac?

15th November 2011, 02:08 AM	#1
ryley_999 diyAudio Member Join Date: Nov 2009	HELP, Denon transformer i need some help, im not even sure if im posting this in the right area, but my avr-1800 transformer is dead, the primary coil has no continuity, and i searched online to buy a new one, ive only found 2 places, one place is out of stock and the other one doesn't ship to canada, could some one possibly let know if there is a place somewhere in canada or a places in the states that will ship it to canada, would be greatly appreciated, thx

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16th November 2011, 03:46 AM	#2
! diyAudio Member Join Date: Jun 2005 Location: Midwest	I don't know of any, but if you're willing to take the outer wrapper off the primary windings, you might find it just has a blown thermal fuse that needs replaced... it's fairly likely, but if the windings look burnt or plastic melted, definitely replace the transformer. While the fuse's original purpose is to prevent excessive transformer overheating, after a while, enough thermal cycles, they will fail without even reaching their original threshold temperature and fail also to reset after cooling down. Otherwise, if you can determine the # of windings and output voltage for each with roughly the same or more current capability where it matters, you might be able to find a generic/other-manufacturer replacement transformer.

16th November 2011, 02:15 PM	#3
ryley_999 diyAudio Member Join Date: Nov 2009	well i have taking off everything on the outside of the transformer and i don't see any thermal fuse, unless im supposed to start taking apart the core? also ive looked online for a few days now trying to find the voltages of this transformer and i couldn't find anything, i found a services manual and i couldn't even find anything in there,

21st November 2011, 04:11 PM	#4
ryley_999 diyAudio Member Join Date: Nov 2009	after a while of scoping threw the repair manual for this receiver i have managed to get the voltages of the lines from the transformer after they have been converted to dc, the voltages are, 10.5, 12.5 , 21 , 33, and 57, now i remember u gain a little bit of voltage from the rectifying process, so im assuming the actual voltages of the ac lines off the transformer is a little lower, is there a formula or something i can use to figure out what the voltage were when they were ac?

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