Granada TV with width Problem - UK Vintage Radio Repair and Restoration Discussion Forum

GadgetM · 6th May 2013, 8:47 pm

Hello again everyone, Firstly, thanks to everyone for their help last time around with my Granada Colour (GEC sarline) TV.
It now has a new fault: When I first turn on the set, the picture is narrower than the screen by about 5mm, but when fully warmed up (20mins) the picture is much wider, probably the correct amount of overscan. I've replaced a couple of capacitors on that board (2200uf and 47uf) as they were the only 2 I had replacements for at the time, but it didn't cure the problem. Any ideas?
Meurig

MALC SCOTT · 7th May 2013, 9:28 am

Do you have a circuit for this set? The first thing to check is the HT voltage. Is it the height or the width?

GadgetM · 7th May 2013, 11:46 am

I'm afraid I have no circuit diagram or service manual at all. It's only the width that changes. I have a spare power board, which I tried swapping but it was still the same, so I'm guessing its still on the board that deals with the HT, width, pincushion etc. Unfortunately I don't have any gear to test the HT voltage.

Welsh Anorak · 9th May 2013, 5:47 pm

Hi
I'd invest in a meter - you can get a reasonable digital (or analogue if you insist) for just over a tenner in Maplin or similar. It'll repay itself in no time and you'll never look back.
Glyn

6th May 2013, 8:47 pm	#1
GadgetM Tetrode Join Date: Jul 2011 Location: Cardiff, Wales, UK. Posts: 72	Granada TV with width Problem Hello again everyone, Firstly, thanks to everyone for their help last time around with my Granada Colour (GEC sarline) TV. It now has a new fault: When I first turn on the set, the picture is narrower than the screen by about 5mm, but when fully warmed up (20mins) the picture is much wider, probably the correct amount of overscan. I've replaced a couple of capacitors on that board (2200uf and 47uf) as they were the only 2 I had replacements for at the time, but it didn't cure the problem. Any ideas? Meurig

7th May 2013, 9:28 am	#2
MALC SCOTT Octode Join Date: Aug 2006 Location: Willington, County Durham, UK. Posts: 1,499	Re: Granada TV with width Problem Do you have a circuit for this set? The first thing to check is the HT voltage. Is it the height or the width? __________________ Malc Scott

7th May 2013, 11:46 am	#3
GadgetM Tetrode Join Date: Jul 2011 Location: Cardiff, Wales, UK. Posts: 72	Re: Granada TV with width Problem I'm afraid I have no circuit diagram or service manual at all. It's only the width that changes. I have a spare power board, which I tried swapping but it was still the same, so I'm guessing its still on the board that deals with the HT, width, pincushion etc. Unfortunately I don't have any gear to test the HT voltage.

9th May 2013, 5:47 pm	#4
Welsh Anorak Dekatron Join Date: Apr 2005 Location: North Wales, UK. Posts: 6,916	Re: Granada TV with width Problem Hi I'd invest in a meter - you can get a reasonable digital (or analogue if you insist) for just over a tenner in Maplin or similar. It'll repay itself in no time and you'll never look back. Glyn