After repeated observations, beats about 5 times a minute images, has certain periodicity. Record the videoplayer using long, prone to mechanical properties, component wear and surface dirt drive components, caused by the unstable image. QVsservice manual download site
 QVsservice manual download site
 QVsservice manual download site
So clean tape system related components first, and watch with state, when a finger gently pressure on the tape is introduced into the conduction band column, image stabilization, tape tension imbalance. Claims to arm tension spring on the adjustment to the position of commissioning, found that the image stability has improved, but still have the phenomenon of jitter, look for the deputy tension arm around the outside of the reel find contact for reel tension to the outer damping felt was worn on the arm of the loss of tension. QVsservice manual download site
And the use of LMM thick felt, processed into the shape of the 5 mmx8mm, with double-sided tape to paste on the vice tension arm (note: never use 502) adhesive, such as, video reproduction image stabilization.QVsservice manual download site