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Post by Ron Rich on Jul 6, 2022 21:35:28 GMT
Hi Hildegard,
Thanks, but if it were a fuse, it would be wired in series, with one of the wires going to a motor--
Ron Rich
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Post by Hildegard on Jul 7, 2022 10:05:07 GMT
Ok, then I'll have to pass. Would you find out if I send you the schematic?
Otherwise I need to ask a Wurlitzer technician to be sure to get a right answer. I will see him on July 25th.
Hildegard
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Post by Ron Rich on Jul 7, 2022 15:33:57 GMT
Hi Hildegard,
I'm sure I have the schematic-- just never noticed that symbol before-- Maybe someone will know sooner, and post it ? I am thinking that it may translate to "ballast resistor" ? Thanks, Ron
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Post by Hildegard on Jul 8, 2022 8:51:49 GMT
Ron, I emailed the technician.
He said "in case the motor gets braked or blocked the VDR becomes low resistance and protects the winding.
VDR equals varistor."
He gives no warranty on this but I don't doubt he is right.
Hildegard
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Post by Ron Rich on Jul 8, 2022 14:30:51 GMT
Hi Hildegard,
Thanks-- that makes sense, as that's what a "Varistor" is supposed to do ! However--no warranty here either, as they often seem to fail-- I don't think they are used today ? Ron Rich
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Post by Hildegard on Jul 8, 2022 21:17:00 GMT
I guess Wurlitzer used the VDR until their last OMT which was in 2013.
For the very last models we don't have updated paper goods, but I doubt they improved anything unless really urgently needed.
Hildegard
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daijiiwata
New Member
being repaired:R.O.430,453,DWLyric(1976)
Posts: 30 
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Post by daijiiwata on Jul 9, 2022 1:20:26 GMT
Hello everyone.
Regarding the VDR, I am aware that it is a varistor element for motor protection purposes.
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Post by Ron Rich on Jul 9, 2022 16:30:11 GMT
Yes-- than-you-- that was verified yesterday-- Ron Rich
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