Onkyo Main Power Relay replacement tutorial

At this point you are ready to start working on the board. On this unit I found that the 150 ohm resistor was only measuring 146.7 ohms. In my experience, this is low enough to cause the relay to fail.



Step 5) Remove the old relay – The points circled in red are for the relay. The ones circled in black are for the resistor.



Step 5a) De-solder the 4 pins on the relay using solder wick




Step 5b) No pictures but carefully cut through the silicon that holds the relay to the board. In some cases there are components underneath so be very careful to slice along the edge of the relay and try not to force the blade if it meets resistance. At this point the relay should fall out. If not, double check that all the solder is removed and press gently on the pins to make sure they are free. While pressing on the pins, go back to the top of the board and cut away any silicon that may still be holding the relay in place. The relay should come out easily.

Step 6) Remove the existing 150ohm resistor
Step 6a) Easier to remove if you cut it off from the top side first using a pair of side cutters






Step 6b) De-solder the 2 pins from the bottom and remove the stubs left from cutting. The board should now look like this





Step 7) Solder in the new components and re-assemble

For the relay, it helps if you have a second set of hands to hold it in place while you apply solder to the pins. For the resistor, it helps if you bend the pins as shown in the picture below to hold it in place

Great job Todd!!

VERY happy that this worked for you! Congratulations!!