Because of it's age and rareity spares are not easy to obtain for the VBS-7000.
Fault and repair guide
Tape transport is sluggish or fails to rewind
Internally th VBS-7000 contains many drive belts which are used in the
mechanics of tape transport. With age these belts become slack causing
malfunctions and when this happens the whole lot should be replaced.
Sluggish threading and capstan problems
The bottom bearing on the capstan motor is prone to wear and because this
motor also drives the threading mechanism threading can become sluggish.
When this happens you will hear a horrible squeaking noise!