Betamax Deck Capstan Problems

[lnx64]

I made this video on Youtube a long time ago. I still haven't fixed this player, but I do heavily suspect capacitor problems. I have an oscilloscope since when this was filmed, and I might try and take another stab at this.

http://www.youtube.com/watch?v=sSBMHBs0-GQ

[ha1156w]

The direct-drive motor is a glorified stepper motor. Have you checked the part of the circuit that "rotates" among the coils? It could be looking for a missing pulse from the control head that would regulate the servo that tells it "how fast".

[Dude111]

I do hope you get it going again buddy!! -- I hear BETAMAX looks/sounds even better than VHS (Which sounds/looks excellent (Especially in SP mode))


Good luck

[lnx64]

Originally Posted by ha1156w

The direct-drive motor is a glorified stepper motor. Have you checked the part of the circuit that "rotates" among the coils? It could be looking for a missing pulse from the control head that would regulate the servo that tells it "how fast".

I never thought of that! Good idea, I will check that.

[Zenith26kc20]

Look for surface mount electrolytics that have leaked their electrolyte on the motor PC board. These can cause the foil to be eaten away causing many problems. It has been a common problem for a while.
Once repaired, those slim Beta machines are real workhorses!
Also, look for open electrolytics in the power supply.