This VCR works fine for about 5-10 minutes, after a while it slows down it's
capstan speed and continues to playback in a jerky mode with distorted sound
and picture noisebars.
All my supply voltages seems correct and Caps ESR on Powersupply are a OK.
Lack of proper documentation prevents me from trouble shooting Capstan servo
circuits. Is there anybody out there having experienced similar problem(s)
and helping me out ?

TYIA