Casio TV-500 Audio / Visual Socket - UK Vintage Radio Repair and Restoration Discussion Forum

Richard_FM · 3rd May 2018, 9:43 pm

A while back I bought a Casio TV-500 LCD TV of eBay but haven't had much time to do much with it.

It works fine with an RF connection, but I've not been able to get a decent picture with the 3/5mm Audio / Visual Socket. I've tried both 2 & 3 RCA to 3.5mm cables but couldn't get anything with the 3 way (I tried all 3).

With the 2 way I could get a fuzzy picture if I used the left channel RCA connector & moved the 3.3mm plug out slightly, but the slightest movement would leave me with a blank screen.

I imagine it need a specific 3.5mm plug to connect correctly, assuming there isn't a fault.

If anyone can suggest anything it would be useful.

julie_m · 3rd May 2018, 10:06 pm

I'd be surprised if it was not a standard 3-conductor ("stereo") 3.5mm. jack socket. But I would not be surprised if it was wired in some unusual fashion like not having what you might think of as the earth connection as earth, just to try to force you to buy their special expensive A/V cable as opposed to using any old Walkman-to-hi-fi cable. (Remember this is before the Internet; no videos showing how to solder up your own A/V cable, nor online marketplaces full of cheap knock-offs of anything you like. Though there were still repair shops, with staff capable of making up custom cables.)

If you have a 3-conductor 3.5mm. plug and a digital multimeter, look for one of the plug connections having a low resistance to the negative battery terminal; that's the earth, and the other two must be video and audio.

winston_1 · 3rd May 2018, 11:41 pm

There are two versions of 3.5mm A/V jack plug. One version, often found in £ shops, is the same size as a stereo plug with an additional ring for video. Another version, supplied with Roku among others, is longer and goes deeper into the corresponding socket.

kan_turk · 4th May 2018, 1:45 am

Don't know about this specific model but quite a few similar sets use 4 pole 3.5mm jacks for A/V connections - with at least 2 different pinouts just to aleviate boredom

Rgds to all
John

philthespark · 4th May 2018, 11:26 am

We get some supplied with certain cctv stuff we use, I could probably dig one out for you if you like, try it and see if it works? Pm me if you want me to send you one.

Richard_FM · 4th May 2018, 2:35 pm

Thanks for the feedback I've been doing some searching & have found the original Casio cables are available, but at a price.

It looks like the jack might be slightly longer than normal, at least going by a You Tube video of someone demonstrating one.

At the moment the TV is being a bit temperamental using the RF connector, but it might be due to low batteries, next time I'll try with a mains adaptor.

3rd May 2018, 9:43 pm	#1
Richard_FM Nonode Join Date: Sep 2017 Location: Stockport, Cheshire, UK. Posts: 2,004	Casio TV-500 Audio / Visual Socket A while back I bought a Casio TV-500 LCD TV of eBay but haven't had much time to do much with it. It works fine with an RF connection, but I've not been able to get a decent picture with the 3/5mm Audio / Visual Socket. I've tried both 2 & 3 RCA to 3.5mm cables but couldn't get anything with the 3 way (I tried all 3). With the 2 way I could get a fuzzy picture if I used the left channel RCA connector & moved the 3.3mm plug out slightly, but the slightest movement would leave me with a blank screen. I imagine it need a specific 3.5mm plug to connect correctly, assuming there isn't a fault. If anyone can suggest anything it would be useful.

3rd May 2018, 10:06 pm	#2
julie_m Dekatron Join Date: May 2008 Location: Derby, UK. Posts: 7,735	Re: Casio TV-500 Audio / Visual Socket I'd be surprised if it was not a standard 3-conductor ("stereo") 3.5mm. jack socket. But I would not be surprised if it was wired in some unusual fashion like not having what you might think of as the earth connection as earth, just to try to force you to buy their special expensive A/V cable as opposed to using any old Walkman-to-hi-fi cable. (Remember this is before the Internet; no videos showing how to solder up your own A/V cable, nor online marketplaces full of cheap knock-offs of anything you like. Though there were still repair shops, with staff capable of making up custom cables.) If you have a 3-conductor 3.5mm. plug and a digital multimeter, look for one of the plug connections having a low resistance to the negative battery terminal; that's the earth, and the other two must be video and audio. __________________ If I have seen further than others, it is because I was standing on a pile of failed experiments.

3rd May 2018, 11:41 pm	#3
winston_1 Heptode Join Date: Oct 2012 Location: London, UK. Posts: 500	Re: Casio TV-500 Audio / Visual Socket There are two versions of 3.5mm A/V jack plug. One version, often found in £ shops, is the same size as a stereo plug with an additional ring for video. Another version, supplied with Roku among others, is longer and goes deeper into the corresponding socket.

4th May 2018, 1:45 am	#4
kan_turk Hexode Join Date: Mar 2014 Location: Dublin, Ireland Posts: 398	Re: Casio TV-500 Audio / Visual Socket Don't know about this specific model but quite a few similar sets use 4 pole 3.5mm jacks for A/V connections - with at least 2 different pinouts just to aleviate boredom Rgds to all John

4th May 2018, 11:26 am	#5
philthespark Pentode Join Date: Oct 2017 Location: Newton-le-Willows, Merseyside, UK. Posts: 158	Re: Casio TV-500 Audio / Visual Socket We get some supplied with certain cctv stuff we use, I could probably dig one out for you if you like, try it and see if it works? Pm me if you want me to send you one.

4th May 2018, 2:35 pm	#6
Richard_FM Nonode Join Date: Sep 2017 Location: Stockport, Cheshire, UK. Posts: 2,004	Re: Casio TV-500 Audio / Visual Socket Thanks for the feedback I've been doing some searching & have found the original Casio cables are available, but at a price. It looks like the jack might be slightly longer than normal, at least going by a You Tube video of someone demonstrating one. At the moment the TV is being a bit temperamental using the RF connector, but it might be due to low batteries, next time I'll try with a mains adaptor.