Hi Visual,
unfortunally, i never changed a CPU on that VCR. My Grundig VCRs had issuses with the backup battery wich was a common failure on them (they went "crazy" when the battery was defective). Bad caps and mecanical problems as worn out belts.
Here is an ad for a VS 220 for 15 Euro (unfortunally in german)
http://kleinanzeigen.ebay.de/anzeige...93991-175-6804
Maybe the seller will ship it to you.