|Analogue Source Turntables, Tonearms, Cartridges, Phono Stages, Tuners, Tape Recorders, etc.|
Please consider donating to help us continue to serve you.
Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
||Thread Tools||Search this Thread|
|21st July 2014, 01:46 AM||#1|
Join Date: Jul 2014
Location: Fort Collins, CO
Turntable too fast. Caps replaced. Next step?
I have a Project/One Model DR-770 turntable that played fine one day and then a couple days later when I went to use it, it was just turning at a very fast speed. There was no change in the speed with the 33/45 switch or the pitch control.
I used Deoxit to clean the pitch control, speed selector and the variable resistors. No change.
I then changed all the electrolytic capacitors, still no change. That is where I am now.
I am just looking for advice on what my next step should be. Should I just replace all the ceramic capacitors, transistors, and resistors and hope for the best or actually get a multi meter and try to figure out what is actually wrong with it?
I have also taken apart the motor and everything looks ok, visually, did not test anything.
Any help is greatly appreciated as to where I should turn my attention to next to try to get this thing running again. I have a new record coming in a month and I would like to get it running at a normal speed by then.
Also, I am a complete beginner with electronics, so that is why I have no idea what to do next.
|21st July 2014, 01:56 AM||#2|
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
Obviously you should try to figure out what is wrong with it, a far better approach and more likely to result in a fix than just randomly and blindly replacing what are most likely good parts.
Have you considered the possibility that it is nothing more than a cold solder joint? Or a crack in the PCB?
Not too sure that the meter is going to tell you much.. Might want to see if you have a friend with some experience who might be able to figure things out.
Edit: It goes without saying that you made sure warranty was expired before you attempted repairs. You might still find Project a good source of information and spare parts or not, but you have to ask to make that determination.
"Extraordinary claims require extraordinary evidence." - Carl Sagan
|Thread Tools||Search this Thread|
|Thread||Thread Starter||Forum||Replies||Last Post|
|Baffle step correction in a FAST 2way||FozzZ||Multi-Way||7||12th March 2013 11:50 PM|
|HELP! Caps replaced-fuzzy sound||sondguy||Solid State||1||6th March 2009 09:11 AM|
|Cheap, Fast, Turntable Isolation: Sorbothane and the Enco Surface Plate||DaveThreshold||Analogue Source||5||21st April 2007 03:07 AM|
|In need of Obbligato caps FAST||HolyGhostFire20||Swap Meet||1||14th December 2005 08:28 PM|
|New To Site?||Need Help?|