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You should look for outward signs of a blown capacitor, while a bad cap may not always show signs 
they usually do.  In this case C13 (right side of picture) was the culprit.  Look at the tops of all the 
other caps and you can see they are all FLAT.  Now look at C13, it has clearly swelled up and the top 
is visibly “domed” upward.  Also look for signs or leakage, brown spots on the cap or the board. 

 
 
 

 

 
 
 
 
 
 

I will jump ahead just a little here so you can get a good idea of what to look for.  These are the two 
caps that were removed; on the left is C14 with the normal “flat” top.  In the center is C13 with its 
swollen and “domed” top.  Even though there were no signs of leakage at first, once removed you can 
see that the bottom of the capacitor was indeed leaking. (Picture on the right) 

 
 

       

   

 

 
 
 
 
 
 
 

Summary of Contents for 3500SD

Page 1: ...ocess to replace is very simple and does not require any electrical knowledge other than how to use a soldering iron What you need 1 Two replacement capacitors with the value of 470uf16v or 470uf 35V...

Page 2: ...With the cover removed this is how your receiver looks inside Here is the area you are looking for the red arrows point to C13 right and C14 left...

Page 3: ...d up and the top is visibly domed upward Also look for signs or leakage brown spots on the cap or the board I will jump ahead just a little here so you can get a good idea of what to look for These ar...

Page 4: ...is I like to reconnect things the same way they were originally connected so I used a felt tip pen to mark a letter T on the top wire connection to the switch Left picture The power plug already had a...

Page 5: ...of the board The left side of the board is mounted on plastic stand offs that have flexible wings at the top I use needle nose pliers to hold these wings together so that I can lift the board off the...

Page 6: ...left is the removed existing capacitor and the replacement 470uf 35V capacitor The can of the 470uf 35V capacitor is larger because of the increased voltage handling capacity 35V The legs are the sam...

Page 7: ...Apply a bead of solder to all four legs and then clip off the excess length with a pair of wire cutters Here is your finished product as seen from the solder side...

Page 8: ...ther Place the board over the plastic stand offs and press firmly into place Replace the two screws on the right side of the board Reconnect the ribbon cable power cable and the two connections to the...

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