Turntable speed

diyman · 22nd May 2005, 07:50 AM

I'm trying to repair a JVC TT101 quartz control turntable for my friend. The speed is not constant and sometimes only lock onto 78 rpm. I think probably its some capacitors in the PSU need changing. Any other ideas where to start?? Operating voltages looks okay though.

jaudio · 22nd May 2005, 05:09 PM

Change the caps. If there are trimmers check those too,they might need adjusting.

EC8010 · 23rd May 2005, 03:58 PM

Unless you know exactly what you are doing, leave trimmers alone! At the moment you have one fault - why add more?

jaudio · 23rd May 2005, 06:44 PM

Quote:

Originally posted by EC8010
Unless you know exactly what you are doing, leave trimmers alone! At the moment you have one fault - why add more?

Quote:

Originally posted by jaudio
Change the caps. If there are trimmers check those too,they might need adjusting.

first change the caps

22nd May 2005, 07:50 AM	#1
diyman diyAudio Member Join Date: Nov 2001 Location: Malaysia	Turntable speed I'm trying to repair a JVC TT101 quartz control turntable for my friend. The speed is not constant and sometimes only lock onto 78 rpm. I think probably its some capacitors in the PSU need changing. Any other ideas where to start?? Operating voltages looks okay though.

23rd May 2005, 03:58 PM	#3
EC8010 diyAudio Moderator Emeritus Join Date: Jan 2003 Location: Near London. UK	Unless you know exactly what you are doing, leave trimmers alone! At the moment you have one fault - why add more? __________________ The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...

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22nd May 2005, 05:09 PM	#2
jaudio diyAudio Member Join Date: Oct 2004	Change the caps. If there are trimmers check those too,they might need adjusting.