Because of it's age spares are not easy to obtain for the V-5250.
Modification for 60Hz, 120V mains operationThe following modification was designed to work on the SL-8000 and has not been tested on this clone.
Also, please note that for 60Hz, 200-240V operation, carry out steps 3 to 5 only.
Thanks to Martin Imber for providing this information
Fault and repair guide
Tape transport is sluggish or fails to rewindInternally the V-5250 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. In particular for the rewind function you will need to replace a tyre on the supply reel.
Strange behaviour of capstan/drum servoThe first thing to check is the tantalum capacitors in the servo circuit.
Sluggish threading and capstan problemsThe 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!
Loading problemsTo make the machine load properly, increase the tension on a spring on the lower sector assembly by shortening it so that a set of gears properly contact the drive tyre.
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