Need Help w/ Garrard Turntable

Need Help w/ Garrard Turntable

Post by Theo086 » Mon, 10 Mar 1997 04:00:00



I have Garrard turntable Model 6-100 as part of an old 60's console.  
Here the problem:  When I have a stack of records on the spindle,  the
records will drop and the tone will just touch each  record for aprox  3
seconds and then lift, move off the record,  and drop the next record
.....untilt the entire stack has been dropped and none played!  The system
works fine except for this inability to play "stacked" albums.    Is this
fixable?


Thanks for the help,
TED

 
 
 

Need Help w/ Garrard Turntable

Post by Jim Muell » Tue, 11 Mar 1997 04:00:00



Quote:
>I have Garrard turntable Model 6-100 as part of an old 60's console.  
>Here the problem:  When I have a stack of records on the spindle,  the
>records will drop and the tone will just touch each  record for aprox  3
>seconds and then lift, move off the record,  and drop the next record
>.....untilt the entire stack has been dropped and none played!  The system
>works fine except for this inability to play "stacked" albums.    Is this
>fixable?

>Thanks for the help,
>TED

I don't know the workings of this particular changer, but most of them
(especially the older ones like this) have the change mechanism driven
by a large cam on the underside.  The cam is driven by an even larger
gear (frequently 4 - 5 " diameter) that is part of the same piece of
metal.  This gear is driven by a small gear that is part of the bottom
of the turntable.  The large gear has a few teeth missing so that it
stops when this section gets to the small gear.  There is also
something to replace those teeth so that it can be started again.  The
idea is that at the end of the record the gear is started and it goes
once around and stops.  This drives one change cycle.

There is a mechanism by which the tone arm can cause these temporary
teeth to be moved into place.  The simplest is a position trip.  When
the arm gets to the end of the record it just pushes them into place.
This works fine if all records end in the same place.  Many, but not
all, do.

To solve this problem, some changers use a velocity trip.  These are
speed sensitive.  When the arm moves faster as it enters the run out
grooves it starts the change cycle.  This works anywhere on the
record.  The disadvantage is that it is difficult to play a record
manually since moving the arm will probably start a change cycle.

Your problem is that the large gear isn't stopping but is turning
continuously.  There can be several causes.  One is that there is
enough dirt accumulated that the movable teeth are stuck in position.
This dirt can be either on this piece itself or on some part of the
trip mechanism (or, more likely, everywhere).

The opposite condition can also cause the same problem.  If the unit
is too clean, centrifugal force generated by the rotating gear can
throw the movable section outward, right where it needs to be to keep
going!  The manufacturer prevented this by using a grease of some
correct viscosity on the movable section.  The tone arm could push it
into position but once it retracted, the grease would hold it there.
If this is your problem, you need to replace the grease with somthing
that works properly in your unit.  If you had the previous cause,
fixing it will probably give you this cause so you still need to find
a suitable grease.

It certainly sounds fixable.

Tip:  Since it's a console, you can probably watch the changer in
action from the bottom.  If you can't, take it out and prop it up on
blocks with a mirror underneath.  Don't set it down on the mechanism.
If things happen too fast when it is powered, you can rotate the
turntable by hand and figure out how it works (or doesn't).

Good luck,

Jim Mueller