On Friday, July 7, 2017 at 1:24:17 PM UTC-4, wrote:
Ramp generator, probably at whatever that unit's equivalent of a jungle IC is. An IC is only as good as what is fed into it. Yoke problems are rare and thus unlikely.

You need a proper sawtooth wave driving that IC or it will not put out what you want. It is that simple. So go backwards and find that ramp generator. If you cannot find it, put up a link to the print and I will. If you do, please use something that an older PC can use.

https://na.suzohapp.com/pdf/service_..._schematic.pdf