UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

bionicmerlin · 28th May 2020, 4:37 pm

I know this is not normal but I’m lucky my partner likes old stuff so she bought me this tv a while back.
On first power up a few caps disided to try and explode . So they were the first to be changed.
First problem picture size only about 3/4 . I could pull it out so much with the hight and width but only so far. On tests H.T. 3 was down about 50 volts below what it should be.
It’s R135 on the main dropper where I tested and according to the diagram should be 1.5k. Yet mine is clearly marked 1.7 K and tests 1.7K
Also I have a new old stock dropper and that’s the same 1.7K
I checked on another old set I have and that’s 1.5K as it should be. So why is it different was their a modification on later sets. What’s going on here.
Also I got poor frame and line hold , poor contrast and focus and 625 dosnt work
Any help appreciate Andy

28th May 2020, 4:37 pm	#1
bionicmerlin Heptode Join Date: May 2010 Location: Warminster, Wiltshire, UK. Posts: 682	Marconi 1400 birthday present I know this is not normal but I’m lucky my partner likes old stuff so she bought me this tv a while back. On first power up a few caps disided to try and explode . So they were the first to be changed. First problem picture size only about 3/4 . I could pull it out so much with the hight and width but only so far. On tests H.T. 3 was down about 50 volts below what it should be. It’s R135 on the main dropper where I tested and according to the diagram should be 1.5k. Yet mine is clearly marked 1.7 K and tests 1.7K Also I have a new old stock dropper and that’s the same 1.7K I checked on another old set I have and that’s 1.5K as it should be. So why is it different was their a modification on later sets. What’s going on here. Also I got poor frame and line hold , poor contrast and focus and 625 dosnt work Any help appreciate Andy Attached Thumbnails __________________ I bet that car doesn't have a suppressor.