02-24-2014, 02:56 PM
It is an FR2 PCB right?
Yeah....you are a glutton for punishment borderline masochistic.
My old experience with Russian TVs - those were the only devices I saw using FR2 PCBs and tubes:
lots of times due to the tubes panels getting hot (yes, with the miniature tubes) the pins of the panels develo cold solder spot around them. When looking at it it might even look normal but touch it with soldering iron and the solder becomes powdery and the pin inside is not wetted and oxidized. And even the solder pad could be grey and not wetted with solder.
Also sometimes due to the weight of the tubes and the temperature the solder pad start separating and eventually tearing off the traces.
Check for that just in case. At least in the TPA-1 all transistor player it did not take any temperature rise, about 1/3 of the solder pads we separated and tore off.
Yeah....you are a glutton for punishment borderline masochistic.
My old experience with Russian TVs - those were the only devices I saw using FR2 PCBs and tubes:
lots of times due to the tubes panels getting hot (yes, with the miniature tubes) the pins of the panels develo cold solder spot around them. When looking at it it might even look normal but touch it with soldering iron and the solder becomes powdery and the pin inside is not wetted and oxidized. And even the solder pad could be grey and not wetted with solder.
Also sometimes due to the weight of the tubes and the temperature the solder pad start separating and eventually tearing off the traces.
Check for that just in case. At least in the TPA-1 all transistor player it did not take any temperature rise, about 1/3 of the solder pads we separated and tore off.
