hello AK’ers. Just acquired this TT and one item, the VTF adjustment is broken. After doing searches it appears this is not uncommon and not a show stopper as I can use my digital scale to dial in the weight. However being who I am, if I can repair it I will. What I have not been able to find is how to repair this issue. I believe I saw somewhere someone used a screw but no details. I know this is a spring loaded mechanism as the dial was resistant to return to zero and when I pulled on the knob to try and free it that’s when I realized this no longer worked. As I said not a show stopper but happy to hear if others were able to correct and how. Thank you and have a great day
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Yamaha PF-800 VTF fix
- Thread starter noklew
- Start date
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Well I figured this out. There is a coil spring inside the housing. I needed to remove the tonearm in order to maneuver the spring back into place. It has a lead on it that slides into the separation of the knob shaft. Once back in it does not settle right on zero however the fine tune feature does work. While I have the arm off going to address the dampener oil for cueing speed
Hello. I am out of town this weekend but will follow up when I return. Thank you for reaching outHello noklew,
can you please explain how you fixed the problem? I sent you a private mail, if you wish to respond privately.
Thanks, much appreciated.
-Jerry
Hello Andy. Are you referring to the fine tune knob that is spring loaded on the front of the arm? I did not remove my VTF and would not recommend pulling on itAfter taking tonearm apart,can I just pull on the VTF dial to remove it or is there a better way?
Can you provide a pic?After taking tonearm apart,can I just pull on the VTF dial to remove it or is there a better way?
okay. thank you for clarifying. On my tonearm, when the spring failed, the dial would turn with resistance and then jump back where it started. That is where I did pull on mine and the knob slid out rather easily. If you pull the knob (ever so easily) does it feel like it is sliding out with minimal resistance?Yes, that is the part that I am talking about.If I can't remove the knob, how do I get to the spring on the inside?
If the knob slides out without resistance then you can access the spring inside. Once you have done that, you will need to reposition the spring in the cavity and align it with the notch on the knob shaft and re-insert it. This is where some trial and error come into play. You will also need a scale so you can test out the weight adjustment accuracy. This was not a simple task and took some time and patience.Yes, that is the part that I am talking about.If I can't remove the knob, how do I get to the spring on the inside?
There is no resistance when I turn the knob and I haven't tried pulling on it.If, when pulled, there is resistance, I might just leave it as is.I don't want to make it worse.
BTW, what mods have you done to yours? I read that isolating the power transformer with rubber washers will eliminate some hum.Do you think damping the base will improve anything?
BTW, what mods have you done to yours? I read that isolating the power transformer with rubber washers will eliminate some hum.Do you think damping the base will improve anything?
Does the knob just spin freely? If yes then it has lost contact with the spring inside. When I purchased mine, I disassembled it and gave it a good cleaning. I applied oil to the platter spindle and I also needed to add oil (300,000 wgt.) to the cueing mechanism (tonearm lowered way to fast). I read that the rubber washers help, but I am not experiencing any hum. The only other item of recent I have noticed is with the 45rpm speed switch. When I played a 45rpm LP I initially heard speed fluctuation and immediately purchased a new switch from Mousser. However as I played with it, it settled down so I have not replaced it as of yet. The only other item was a new belt and upgraded the cartridge.