tonedeaf
Rank: Trio
Oldies are Goldies
Posts: 168
|
Post by tonedeaf on Mar 5, 2018 13:43:36 GMT
Hi Everyone.
My TT platter has just started widly fluctuating and will not hold its speed on either 45 or 33. Could this be a belt slipping or the Servo motor coming to the end of its life?
|
|
|
|
Post by John on Mar 5, 2018 18:24:10 GMT
Hopefully Ant will be along later
I presume its the motor if widely fluctuating
|
|
|
|
Post by MartinT on Mar 5, 2018 18:29:23 GMT
It could be a loose belt. What type of motor is it and what control electronics does it use?
|
|
|
|
Post by ChrisB on Mar 5, 2018 19:04:41 GMT
|
|
tonedeaf
Rank: Trio
Oldies are Goldies
Posts: 168
|
Post by tonedeaf on Mar 7, 2018 11:43:44 GMT
It appears to be only when the auto shutoff is engaged. I might have crated the fault myself as it would shut off before the record ended and having looked insde there is a black disc on an arm attached to a shaft below the arm. This disc i guessed shut off the light to a sensor below which then turned off the power. I moved the disc a few degrees from the centre of the platter so it would cover the light later but all I seem to have done is bugger up the operation.
|
|
|
|
Post by MartinT on Mar 7, 2018 11:56:25 GMT
Move it back to where it was?
|
|
|
|
Post by speedysteve on Mar 7, 2018 17:03:08 GMT
Can't help with the speed fluctuation maybe but..
Ideally you could get a scope on it and measure at various points to narrow it down.
Could it be the speed pitch pot?
The Pioneer PL-71 suffered from that..
Or switch could be dirty and not making a good contact. PL-71 also suffered from that too..
I had an RD11e back in the 80's / 90's.
Mine had a weird paddle attached to the bottom of the tonearm that broke a light beam and stopped the motor before the inner grove thump!
I fitted a different arm of course..
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Mar 7, 2018 19:50:10 GMT
|
|
tonedeaf
Rank: Trio
Oldies are Goldies
Posts: 168
|
Post by tonedeaf on Mar 9, 2018 13:45:19 GMT
Mine had a weird paddle attached to the bottom of the tonearm that broke a light beam and stopped the motor before the inner grove thump!
I fitted a different arm of course..
Mine has one too, i adjusted the angle becasue it was turning the power off too early, it apears i may have caused this speed fluctuation issue by doing so, although i don't see how the two issues are connected
|
|
