UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Help Pls = Grundig TK64 Motor Not running

Phantomrose1999 · 7th Dec 2018, 5:40 am

Well, I opened a TK40 with nice coloured motor wires. Measured the resistance across the 3 known leads

End to end = 51 ohms
Middle to ends = 234 / 286 ohms.

Now I measured the TK64 motors with unknown coloured motors

End to end 29.8 ohms
Middle to either end 82 ohms

I traced some of the wiring and only got more confused It not match my understanding or the TK40 wiring. In the TK40 the main power input is across the lowest resistance, but not in the TK64. Please see photos.

I have tried connecting a new 5uf between C and A, and between C to B, after isolating C from existing circuitry. Still no life.

The wiring I traced seems to indicate I understand the motors wires. But the resistance test and comparison to the TK40 has got me very confused

Am lost now. The resistance measured does not match the expected wiring. But I can’t trace all of it anyway.

Any experts ?

7th Dec 2018, 5:40 am	#16
Phantomrose1999 Hexode Join Date: Mar 2008 Location: Melbourne, Victoria, Australia Posts: 289	Re: Help Pls = Grundig TK64 Motor Not running Well, I opened a TK40 with nice coloured motor wires. Measured the resistance across the 3 known leads End to end = 51 ohms Middle to ends = 234 / 286 ohms. Now I measured the TK64 motors with unknown coloured motors End to end 29.8 ohms Middle to either end 82 ohms I traced some of the wiring and only got more confused It not match my understanding or the TK40 wiring. In the TK40 the main power input is across the lowest resistance, but not in the TK64. Please see photos. I have tried connecting a new 5uf between C and A, and between C to B, after isolating C from existing circuitry. Still no life. The wiring I traced seems to indicate I understand the motors wires. But the resistance test and comparison to the TK40 has got me very confused Am lost now. The resistance measured does not match the expected wiring. But I can’t trace all of it anyway. Any experts ? Attached Thumbnails Last edited by Phantomrose1999; 7th Dec 2018 at 6:06 am.