Sony PS-LX520 troubles

pageboy · 19th January 2011, 09:42 PM

I was recently given a Sony PS-LX520 turntable. I thought I'd get it working if I could. I plug it in and turn it on and I get nothing, almost like a fuse were blown, but I don't find any. My first check fails - no voltage on the secondary of the main power transformer. There are some markings on this but nothing I can identify. I've done some digging around but I don't really know where to look for a replacement. Can someone give me some advice on this - point me to where I can find a direct replacement? Or maybe someone has one of these not doing anything who could take a voltage measurement of the secondary and tell me it is. Maybe I could find something else that would work. TIA.

Number13 · 20th January 2011, 07:13 PM

Are you surer you are getting power as far as the transformer?
Those 80s era liner trackers have several arm position switches
and on that model, as most, the tone arm must be parked all the
way to the right for the table to power up.
Does the tone arm move back and forth properly?
If not, I would start there.

pageboy · 20th January 2011, 07:34 PM

The main power cord runs straight to the transformer. There are no switches ahead of it. The logic control type power switch goes to the circuit boards. It appears that maybe this kind of unit was designed to be plugged into a switched outlet on the stereo. If the cord is plugged in, there is power on the primary of the main transformer, and I measure line voltage there. There is nothing on the secondary.

pageboy · 17th November 2011, 09:13 PM

Unable to find any information absolutely anywhere, my only option was to tear the transformer apart and count the windings to get a primary/secondary ratio. I removed the transformer, confirmed an open primary, and started unwinding. I can see that the primary is obviously burnt. It must be from never getting switched off and having power on it 24/7. Or maybe it took a lightning hit or something. Who knows. I counted approximately 1100/226 turns primary to secondary, plus or minus a few. I might have lost exact count. With a 120V line, that would give me a 24.7V output. I will have to guess at a current rating. I checked Radio Shack's website not hoping for much. Turned out they had one rated at 25.2VCT and .45A for less than $8. That looked close enough. I hooked it up and turned it on and it seems to work fine. I will definitely have this plugged into a switched outlet from now on.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Re: Sony PS-6750	Brownlow	Analogue Source	1	7th July 2011 03:19 PM
Sony PS-X800 tonearm sometimes does not lower??	Maniac	Analogue Source	8	12th May 2010 06:04 PM
Sony PS-X50 wanted	borgunit	Swap Meet	0	19th April 2005 01:19 PM
Sony PS-F5 info needed	dubmaster45	Analogue Source	1	8th December 2004 05:01 AM
Sony PS-X4 turntable	rho	Analogue Source	8	29th March 2004 05:30 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

20th January 2011, 07:13 PM	#2
Number13 diyAudio Member Join Date: Jul 2010	Are you surer you are getting power as far as the transformer? Those 80s era liner trackers have several arm position switches and on that model, as most, the tone arm must be parked all the way to the right for the table to power up. Does the tone arm move back and forth properly? If not, I would start there.

20th January 2011, 07:34 PM	#3
pageboy diyAudio Member Join Date: Mar 2008 Location: FW IN	The main power cord runs straight to the transformer. There are no switches ahead of it. The logic control type power switch goes to the circuit boards. It appears that maybe this kind of unit was designed to be plugged into a switched outlet on the stereo. If the cord is plugged in, there is power on the primary of the main transformer, and I measure line voltage there. There is nothing on the secondary.

17th November 2011, 09:13 PM	#4
pageboy diyAudio Member Join Date: Mar 2008 Location: FW IN	Unable to find any information absolutely anywhere, my only option was to tear the transformer apart and count the windings to get a primary/secondary ratio. I removed the transformer, confirmed an open primary, and started unwinding. I can see that the primary is obviously burnt. It must be from never getting switched off and having power on it 24/7. Or maybe it took a lightning hit or something. Who knows. I counted approximately 1100/226 turns primary to secondary, plus or minus a few. I might have lost exact count. With a 120V line, that would give me a 24.7V output. I will have to guess at a current rating. I checked Radio Shack's website not hoping for much. Turned out they had one rated at 25.2VCT and .45A for less than $8. That looked close enough. I hooked it up and turned it on and it seems to work fine. I will definitely have this plugged into a switched outlet from now on.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)