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Sony PS-LX510 Turntable

M

Madness

Jan 1, 1970
0
Been working on this turntable for a bit of time. Did get a copy of the
service manual. Replaced tonearm belt, lubed rail & adjusted some of the
adjustment screws (arm height,tracking error, etc.) inside the tonearm,
itself. So, no more sticking during play. But one issue remains: rumble
being picked up when the stylus lands on the record. Being a
direct-drive, what's the fix (SM has no info)? Oil to the motor, perhaps?
 
N

N_Cook

Jan 1, 1970
0
Madness said:
Been working on this turntable for a bit of time. Did get a copy of the
service manual. Replaced tonearm belt, lubed rail & adjusted some of the
adjustment screws (arm height,tracking error, etc.) inside the tonearm,
itself. So, no more sticking during play. But one issue remains: rumble
being picked up when the stylus lands on the record. Being a
direct-drive, what's the fix (SM has no info)? Oil to the motor, perhaps?

have you washed out the bearing and re-lubed it? could be just hardened lube
rather than grime
 
M

Madness

Jan 1, 1970
0
have you washed out the bearing and re-lubed it? could be just hardened lube
rather than grime
The motor bearing? I'll take a look at it.
 
G

GregS

Jan 1, 1970
0
Been working on this turntable for a bit of time. Did get a copy of the
service manual. Replaced tonearm belt, lubed rail & adjusted some of the
adjustment screws (arm height,tracking error, etc.) inside the tonearm,
itself. So, no more sticking during play. But one issue remains: rumble
being picked up when the stylus lands on the record. Being a
direct-drive, what's the fix (SM has no info)? Oil to the motor, perhaps?

i don't think I ever had this problem. I know the low frequency fundamemtal resonance
of the arm/cartridge can agrivate this. To find out place the needle on the non moving
record and gently tap the record to see if there is a similar frequency sound. You could also try a record
clamp but this may actually increase rumble. A record clamp makes a huge difference on the tap test.
So whats the frequency of the rumble ?

greg
 
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