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 STC T212DA circuit diagram/service manual needed
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 Return to top of page · Post #: 1 · Written at 11:41:51 AM on 31 December 2019.
John116's Gravatar
 Location: Ryde, NSW
 Member since 29 October 2008
 Member #: 370
 Postcount: 46

Hi - looking for a service manual or even a circuit diagram for this set, so I can the restoration of it. Happy to pay for it.

John


 
 Return to top of page · Post #: 2 · Written at 9:24:36 PM on 31 December 2019.
MonochromeTV's avatar
 Location: Melbourne, VIC
 Member since 20 September 2011
 Member #: 1009
 Postcount: 1050

There is a schematic at Radiomuseum. https://www.radiomuseum.org/r/stcaus_t212da_t212.html

However a TV like yours warrants the 39 page service manual. I'll scan the document and send a pdf copy here gratis. Might take a few days though.


 
 Return to top of page · Post #: 3 · Written at 11:02:19 AM on 1 January 2020.
John116's Gravatar
 Location: Ryde, NSW
 Member since 29 October 2008
 Member #: 370
 Postcount: 46

Wow - thank you MonochromeTV. Much appreciated.


 
 Return to top of page · Post #: 4 · Written at 3:14:24 PM on 6 January 2020.
John116's Gravatar
 Location: Ryde, NSW
 Member since 29 October 2008
 Member #: 370
 Postcount: 46

How are you going with this?


 
 Return to top of page · Post #: 5 · Written at 6:41:14 PM on 7 January 2020.
MonochromeTV's avatar
 Location: Melbourne, VIC
 Member since 20 September 2011
 Member #: 1009
 Postcount: 1050

Sorry John,

I am nibbling away at it , but most my time at the moment is taken up by work. I have a few days off later in the week and you should have it by the weekend.


 
 Return to top of page · Post #: 6 · Written at 5:42:49 AM on 8 January 2020.
John116's Gravatar
 Location: Ryde, NSW
 Member since 29 October 2008
 Member #: 370
 Postcount: 46

All OK, many thanks again.


 
 Return to top of page · Post #: 7 · Written at 2:55:02 PM on 15 January 2020.
MonochromeTV's avatar
 Location: Melbourne, VIC
 Member since 20 September 2011
 Member #: 1009
 Postcount: 1050

 
 Return to top of page · Post #: 8 · Written at 3:19:19 PM on 15 January 2020.
John116's Gravatar
 Location: Ryde, NSW
 Member since 29 October 2008
 Member #: 370
 Postcount: 46

Where did you send it to?


 
 Return to top of page · Post #: 9 · Written at 8:21:35 PM on 15 January 2020.
Brad's avatar
 Administrator
 Location: Greenwich, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 5562

See the links in Post 7, John. Smile


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...

 
 Return to top of page · Post #: 10 · Written at 8:25:42 AM on 16 January 2020.
John116's Gravatar
 Location: Ryde, NSW
 Member since 29 October 2008
 Member #: 370
 Postcount: 46

Awesome!!! Thanks so much!!! This will be invaluable!


 
 Return to top of page · Post #: 11 · Written at 11:34:28 AM on 19 January 2020.
John116's Gravatar
 Location: Ryde, NSW
 Member since 29 October 2008
 Member #: 370
 Postcount: 46

Success! With the help of the manual, the television now works. It needs some height/linearity adjustment, but otherwise looking good.

It's actually a BGE branded TV, but made by STC.

Pictures below:


 
 Return to top of page · Post #: 12 · Written at 10:51:48 PM on 19 January 2020.
Ian Robertson's Gravatar
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 1305

They were a VERY good TV in their day. Many stayed in service until colour arrived in 1974.

The following 110 degree chassis was very much a cost reduction exercise and a very disappointing performer by comparison. I recall having to re-install one of these chassis after a workshop overhaul. The client had been left a loan set, a battered Pope Motorola metal case 14" portable. On re-installation, the STC picture faded and fluttered badly whenever a large vehicle on the road above passed through the signal path. Reason? Only two stages of vision IF and simple AGC with a long time constant. The older loan set outperformed the STC in an embarrassing way.

How to explain to the client that there was nothing we could do about it? I think I ended up booking it in for an antenna call.

Consider yourself lucky you don't have one of these!

Although, running from a modulator, you'd only have to put up with the floating, AC coupled black level.


 
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