Hi Folks

I have a National TC-1406R Colour TV that is currently playing in black and white but not colour. I am based in sydney and took it to Wagner for repairs. They told me it needed a new flipback transformer mar board but that they are no longer available. Does anyone know where I could source a part to fix it or know a specialist or enthusiast collector who might be able to repair it.

Its such an awesome looking tele, I don't want to give up hope until I've exhausted all avenues!!

Thanks for any advice in advance

Cheers

Kim

Interesting to know what sort of board it is? Some modern stuff is just e waste once it goes wrong. But the older it is the more of it there is that escapes, the throw away mentality. At least all of the guns are working if it's a CRT.

Here is a video tour of the insides of that model. Unfortunately, as with too many YouTube videos, the lighting is very poor.

https://www.youtube.com/watch?v=2uu8LZWjWlY

Interestingly, it has a built in remote control:

https://www.youtube.com/watch?v=-XytCPAQ0Ak

Hi Kim.

I have the full service manual for that model. I can also look at your TV if you wish.
Are you sure that it is not something silly, like the colour control being turned-down, or the fine tuning not being adjusted?

Regards

Wayne.

From my old notes the TC-1406R has an M11 Chassis, vintage 1984.
Not many common faults noted on this chassis, so may have been fairly reliable.
Using normal components, it should be fixable.I may even have a circuit somewhere.
There would be dozens of high ESR or open electos, at this age point.
Not like restoring a valve radio.
JJ

Wow thanks for all the great advice everyone.

Wayne: I'm pretty sure it isn't something silly as I had a play around and also took it to Wagner Electronics to see if they could fix it. It would be amazing if you could take a look at it when its convenient. I'm based in Marrickville/Redfern, but I can bring it out to wherever you're based if you like? What's the best plan of attack?

Johnny: Thanks for that specialist advice and super excited to hear there might be a way to fix it! Perhaps I can contact you again about spare parts on this thread after Wayne's taken a look at it?

Really appreciate everyones thoughts. Thanks!

Hello again Kim.

My e-mail address is un-hidden. If you click onto my User name "Labrat" you will find my e-mail address.

Contact me and we can arrange to to get the TV to me.
I'm happy to help you at no charge.

Regards Wayne.

"They told me it needed a new flipback transformer mar board but that they are no longer available"
If you mean flyback transformer, it won't be that, if it's showing an OK B&W picture.

What are you using for a colour video source?
A lot of equipment with a PAL video output has the colour subcarrier a mile off frequency these days, so it pays to check it with more than one source.
Also, are you absolutely sure you have it tuned in correctly? If you tune to the wrong sideband, you will get a nice B&W picture but no colour.
As Johnny says, an open-circuit electro is a strong contender.
In sets of that vintage, you'll most likely find that all the signal processing is done in one large chip. If it's in a socket, it's remarkable how often pulling it out and re-fitting it will cure faults like that.

Also, remember, that's a live chassis, and it remains live whichever way the mains is connected, so be careful!

Maybe "flipback transformer" is meant to be "line output transformer". This transformer will send a reference pulse back to the colour decoder, via a resistor, to tell it a new line has begun (PAL = phase alternating line). If the pulse is missing (usually due to the resistor), then no colour.

Pull out your oscilloscope and make sure the pulse exists, and makes it all the way back to the colour decoder. (And no, I have no schematic).

Thanks Keith and Robbbert, great advice and very much appreciated. Wayne's kindly going to take a look at it for me. I'll let him know your thoughts if he hasn't already seen them and let you know how we go.

Hello All.

The television in question was fixed some time ago, and was picked-up only last Friday, due to various reasons.

The real fault was the tuning preset switch being dirty and causing the tuning voltage to vary wildly.

While I had the set, I gave it a complete service to give it some relialability.

It is a pity the tube has a little air in it affecting the focus.
Still it is only noticable when it is sitting next to the Sharp portable TV that I use for fixing video recorders.

Case closed.

Wayne.