How to solder with capacitor on foil side?

[sajjad amer]

Dear all
I am trying to restore amplifier boards on Revox B780. I would like to install new capacitors but capacitors on the amplifier board are soldered on the foil side. I could not get the soldering iron underneath the capacitors so I used a hacksaw to take them off and clean the solder contacts. But now the question is how do I solder them back on? As a last resort I will use jumper wires but if Revox technicians can solder it so should anyone. Has anyone got any experience how to tackle it?
Below is a picture of B750 Boards to give you an idea of what I am talking about. Top board is in genuine condition , foil and solder contacts are underneath the capacitor. Please help !

 

[Binkman]

greetings
https://www.hifiengine.com/manual_library/revox/b780.shtml
see pdf pg 10 to remove heat sink(s) etc.

 

[BillWojo]

Take the heatsinks off.

BillWojo

 

[arts]

I believe that he is referring to the large electrolytics.....

 

[Goldie99]

Maybe photos of the actual boards, top & bottom, might help ?

 

[Hyperion]

Maybe the large electrolytics are 'snap-ins' ?

 

[Goldie99]

Maybe the large electrolytics are 'snap-ins' ?

...and the boards are double sided ?

http://audiokarma.org/forums/index.php?threads/revox-b780-restoration.701664/

 

[sajjad amer]

I agree with you all, I am talking about the electrolytics and they are indeed snap ins. However the board is single sided. and only way to solder is on the same side as the capacitor. This is the picture of my amplifier board. The mess on board is not mine, I want to do it properly, unlike the jumper wires used by previous repairer. I have marked the area of concern.

 

[Joe Roberts]

Are the insides of the cap holes plated? If so, you can solder from the "back" of the PCB

 

[Binkman]

I gave the correct answer! see link to show screws to remove heat sinks.
https://www.hifiengine.com/manual_library/revox/b780.shtml

 

[BinaryMike]

One of the best ways to deal with problems like this is to install eyelets in the board. Like these: https://www.alliedelec.com/m/d/5c6352584468ed2d05f437f5c7bd642e.pdf

 

[sajjad amer]

@Joe Roberts @BinaryMike you both are absolutely correct. Thank you ever so much. There are brass eyelets on the board, which allow soldering. Problem sorted. I could not clear solder from the eyelets as it needed higher temperature, once cleared the solder flowed around terminals easily. Problem sorted