1970's Dynatron Cordova GR14 Sound Faulty. - UK Vintage Radio Repair and Restoration Discussion Forum

HavenRoyal · 2nd May 2021, 3:58 pm

I have a 1970's Dynatron Cordova record player. Recently the records only play very quietly, as in hardly audible. I’m not sure if this is related but when it was working, it used to make a thud/crackle noise when turned on as though the speaker was working, since it has stopped working, it doesn’t make this noise when turned on.

Any advice on what the problem might be/how I can fix this would be much appreciated!

Edward Huggins · 2nd May 2021, 4:47 pm

I suspect the power supply section has failed. It may now need new rectifiers and/or smoothing caps.

HavenRoyal · 3rd May 2021, 9:21 am

Quote:

Originally Posted by Edward Huggins

I suspect the power supply section has failed. It may now need new rectifiers and/or smoothing caps.

Thank you for your advice! I’m afraid I’m a novice when it comes to the parts of a record player so I’m not sure which parts you’re referring to (power supply, rectifiers, smoothing caps). I have taken photographs of the inner workings.

If you’re able to point out these parts with reference to the photograph, that would be very helpful and appreciated.

Click image for larger version

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Station X · 3rd May 2021, 10:31 am

Hello and welcome to the forums.

The first thing you need to do is to download the service manual for your player from here:-

https://www.service-data.com/product...09/1814/m17609

To get you started I've posted a drawing of the power supply. I suggest you locate the power supply and check that the fuse F1 hasn't blown.

If you're going to make any further progress you're going to need a Digital Multimeter (DMM). Plenty of threads on these if you search for them.

When you've got one check the DC voltage across SK2 (socket 2) with the player powered up and switched on. Expect to measure at least 22.2 Volts.

Does the pilot light illuminate when the player is switched on, assuming it did before the fault developed?

2nd May 2021, 3:58 pm	#1
HavenRoyal Diode Join Date: May 2021 Location: Leeds, West Yorkshire, UK. Posts: 2	1970's Dynatron Cordova GR14 Sound Faulty. I have a 1970's Dynatron Cordova record player. Recently the records only play very quietly, as in hardly audible. I’m not sure if this is related but when it was working, it used to make a thud/crackle noise when turned on as though the speaker was working, since it has stopped working, it doesn’t make this noise when turned on. Any advice on what the problem might be/how I can fix this would be much appreciated!

2nd May 2021, 4:47 pm	#2
Edward Huggins Dekatron Join Date: Sep 2015 Location: Southwold, Suffolk, UK. Posts: 8,338	Re: 1970's Dynatron Cordova Sound Faulty. I suspect the power supply section has failed. It may now need new rectifiers and/or smoothing caps. __________________ Edward.

3rd May 2021, 10:31 am	#4
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,289	Re: 1970's Dynatron Cordova Sound Faulty. Hello and welcome to the forums. The first thing you need to do is to download the service manual for your player from here:- https://www.service-data.com/product...09/1814/m17609 To get you started I've posted a drawing of the power supply. I suggest you locate the power supply and check that the fuse F1 hasn't blown. If you're going to make any further progress you're going to need a Digital Multimeter (DMM). Plenty of threads on these if you search for them. When you've got one check the DC voltage across SK2 (socket 2) with the player powered up and switched on. Expect to measure at least 22.2 Volts. Does the pilot light illuminate when the player is switched on, assuming it did before the fault developed? Attached Thumbnails __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.