The Mellotron Group

Hi group,

I am in the midst of going through my entire M400 and making sure everything is up to snuff. I just finished recapping the power supply, now I turn my attention to the motor.

Upon inspection, the brushes look worn, one moreso than the other. Anyone know of a source for new motor brushes?

Thanks,
Chris

Chris, if you have any kind of SMS control card and you replaced more than  
the two caps closest to the front (or farthest from the mains socket), you  
wasted money. They don't do anything.
 
 
In a message dated 7/26/2010 8:22:32 A.M. Eastern Daylight Time,  
fazeka@gmail.com writes:

I just  finished recapping the power supply, now I turn my attention to the 
 motor.

An obvious question.  Why are the caps there if they don't do anything?


Clay

--- In newmellotrongroup@yahoogroups.com, lsf5275@... wrote:

>
> Chris, if you have any kind of SMS control card and you replaced more than  
> the two caps closest to the front (or farthest from the mains socket), you  
> wasted money. They don't do anything.
>  
>  
> In a message dated 7/26/2010 8:22:32 A.M. Eastern Daylight Time,  
> fazeka@... writes:
> 
> I just  finished recapping the power supply, now I turn my attention to the 
>  motor.
>

Hi Frank,

Thanks for your concern, but no money was wasted =). I rewired the power supply for an SMS type controller card, as this pic shows (before the new caps were installed).

http://img534.imageshack.us/img534/5347/m400powersupply.jpg

Note: this shot was also taken before the mod to move the fuse before the power switch.

Now, what about those motor brushes? =)

Thanks,
Chris

--- In newmellotrongroup@yahoogroups.com, lsf5275@... wrote:

>
> Chris, if you have any kind of SMS control card and you replaced more than  
> the two caps closest to the front (or farthest from the mains socket), you  
> wasted money. They don't do anything.
>  
>  
> In a message dated 7/26/2010 8:22:32 A.M. Eastern Daylight Time,  
> fazeka@... writes:
> 
> I just  finished recapping the power supply, now I turn my attention to the 
>  motor.
>

Good work!
 
Unless the brushes are nearly gone, I wouldn't replace them. Clean the  
commutator and leave them be, they are well seated. I have yet to have to  
replace any so far. If you remove them, make sure you restore them in their  
exact positions.  
 
Here is are a couple of power supply photos showing how nicely they  clean 
up. Typically I test the old capacitors to see if they will meet specs. I  
have a capacitor tester and if they work well, I leave them. I am more  
concerned with the capacitors on the WME boards or old PMLs and the caps on old  
SMS boards. You might consider replacing that old Bulgin mains socket with a 
 nice IEC socket.
 


 
In a message dated 7/26/2010 8:32:00 P.M. Eastern Daylight Time,  
fazeka@gmail.com writes:

 
 
 


Hi Frank,

Thanks for your concern, but no money was wasted  =). I rewired the power 
supply for an SMS type controller card, as this pic  shows (before the new 
caps were installed).

_http://img534.imageshack.us/img534/5347/m400powersupply.jpg_ 
(http://img534.imageshack.us/img534/5347/m400powersupply.jpg) 

Note:  this shot was also taken before the mod to move the fuse before the 
power  switch.

Now, what about those motor brushes?  =)

Thanks,
Chris

--- In _newmellotrongroup@yahoogroups.com_ 
(mailto:newmellotrongroup@yahoogroups.com) ,  lsf5275@... wrote:
>
> Chris, if you have any kind of SMS control  card and you replaced more 
than 
> the two caps closest to the front (or  farthest from the mains socket), 
you 
> wasted money. They don't do  anything.
> 
> 
> In a message dated 7/26/2010 8:22:32 A.M.  Eastern Daylight Time, 
> fazeka@... writes:
> 
> I just  finished recapping the power supply, now I turn my attention to 
the 
>  motor.
>

all the other electronics were necessary for 220 volts and the CMC.
 
 
In a message dated 7/26/2010 11:54:24 P.M. Eastern Daylight Time,  
ecclesreinson@rogers.com writes:

 
 
 
An obvious question. Why are the caps there if they don't do  anything?

Clay

--- In _newmellotrongroup@yahoogroups.com_ 
(mailto:newmellotrongroup@yahoogroups.com) ,  lsf5275@... wrote:
>
> Chris, if you have any kind of SMS control  card and you replaced more 
than 
> the two caps closest to the front (or  farthest from the mains socket), 
you 
> wasted money. They don't do  anything.
> 
> 
> In a message dated 7/26/2010 8:22:32 A.M.  Eastern Daylight Time, 
> fazeka@... writes:
> 
> I just  finished recapping the power supply, now I turn my attention to 
the 
>  motor.
>