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 After a schematic for a 1979-1980 Toshiba Blackstripe C1821
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 Return to top of page · Post #: 1 · Written at 1:24:08 PM on 27 August 2019.
NickyD's avatar
 Location: Erskineville, NSW
 Member since 5 July 2018
 Member #: 2261
 Postcount: 10


Can anybody on here please help me locate a schematic for a Toshiba C-1821 Colour TV from around 1979-1980.

The TV has an issue is with the vertical sync pulse.

The model is the same set in the below link.


Any help would be greatly appreciated.


 Return to top of page · Post #: 2 · Written at 6:08:50 PM on 1 September 2019.
Ian Robertson's Gravatar
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 2088

Used to sell that model when new with a video monitor conversion. They were a well designed TV with good performance and one of the early "single chip" designs..

Circuits all gone, sorry. Might still be able to help. What's the issue, weak vertical sync?

 Return to top of page · Post #: 3 · Written at 10:00:01 AM on 2 September 2019.
Irext's avatar
 Location: Werribee South, VIC
 Member since 30 September 2016
 Member #: 1981
 Postcount: 414

I seem to remember a filter cap on one of the supplies causing poor vertical lock on that model.
I wish I had a circuit to point out which one.
Otherwise they were supremely reliable.

 Return to top of page · Post #: 4 · Written at 10:27:20 AM on 13 September 2019.
NickyD's avatar
 Location: Erskineville, NSW
 Member since 5 July 2018
 Member #: 2261
 Postcount: 10

Thanks for your replies guys,

Irekt, you hit the nail on the head. It’s a great little set that has a beautiful picture, however the vertical hold didn’t lock. I’ve been liaising with Labrat about this. As were both in Sydney, Wayne he agreed to take a look at it and I believe he’s replacing one of the IC’s in the vertical section which has rectified the issue.

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