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Old 14th Jan 2021, 12:57 pm   #143
TerryB44
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Join Date: Mar 2013
Location: Liverpool
Posts: 102
Default Re: Grundig TK20 and Truvox R82. Help Required Please.

Good morning all, after having fixed the hum on the Truvox R82 caused by the open circuit head, I now seem to have another problem. The main capstan motor runs fine at 3.75ips but is a trifle slow at 7.5ips and also from time to time it grinds to a halt and then will either pick up again itself or with a spin of the reels gets it going again. I've read some of the service notes which mention to two large 3k and 4k wire wound resistors. The circuit diagram for the capstan motor shows three wires red, yellow and green, or red, yellow and mauve depending on which diagram you look at. Problem is I can only see two black wires connected to the motor from the resistors and that's it. It mentions a 2uF capacitor, but I can't see that either! Problem is that this is intermittent which makes it hard to pinpoint the cause.
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