Hi everybody
Hurrah, I just got my TDS 544A working, usual acq fault, replaced all the electrolytics on the acquisition PCB - still same fault, so I replaced all the double and quad SOIC op.amps (TL 02/04 )--fault finding by attrition
I removed the caps by making a 2 pronged fork out of wire for the tip of the soldering iron, to unsolder both sides of the cap simultaneously.
You can alternate the iron from one side of the cap to the other whilst lifting the cap, but there a serious risk of pulling a pad off.
For the ICs I made a U shaped tip for the end of the iron out of brass sheet, which with a bit of adjustment gripped the IC and unsoldered both sides at the same time, very quick.
I then cleaned up all the pads with desoldering (the spellcheck tried to change this to 'disordering' braid) and cleaned the board with isopropyl alchohol.
For replacement i used solder paste and a very fine iron tip, all helped enormously by a great purchase on XXXX,
a nearly new Leica StereoZoom 4 binocular microscope for under $180, it's one of those things you don't know how you managed without
Finally a wash in the dishwasher.
Jonathan
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