| Remove the coin tray and button assembly by removing the Phillips screw.
Gently pull on the assembly to release.
Press the locking clips (2 clips per button) to release, and push the button through the hole toward the front.
There are two bulbs installed in each button. The top bulb, brown base, is the active/on indicator bulb. The lower bulb, blue base, is what illuminates the button.
Take out all the bulbs from the buttons. Use a flat head screwdriver to turn each bulb 1/4 turn counter clockwise, and then lift them out.
For best lighting results line the inner part of the button (the socket where the light bulb/LED goes in) with aluminum foil – this will increase the light reflection therefore increasing the luminosity of the button
Now we need
to take all of our bulbs and convert them. Remove the stock bulb from the base by unwinding the two contact leads. You might need a used staple or something
to pick the leads up from the grooves.
Now pull the bulb out of the plastic holder and insert
the LED through the holes.
To make the buttons light up a little brighter, leave a small space between the plastic bulb holder and the bottom of the LED. (The blue arrows are pointing to the space that was left.) You might want to leave a bit more room than shown in the picture.)
Note which side
is the anode and which side is the cathode. Unlike regular
bulbs, LED's are polarized and will not work if you
plug them in the wrong way. The anode is the + lead
and is longer than the other.
Bend the negative (-) lead so it goes into the groove. Bend the positive (+) lead 90° from the other groove and cut both leads so that they do not stick out past the bulb holder. It will help if you can bend the positive (+) lead slightly toward the end. (See right picture.)
 
Solder one end of the wire (included with your kit) to the the negative (-) lead and wrap the wire around the bulb holder in the groove. The wire will go where the contact leads on the stock bulb were before you removed the bulb. Cut off any extra wire an put the end of the wire in the groove.
  
Take another piece of wire (included with your kit) and bend it in a "U" shape an put it on the bulb holder as shown in the left picture. Cut one of the ends short enough so it will fit down in the groove, and bend the wire into the groove. Next cut the other end of the wire and fold it into the same groove. It is OK if it overlaps the other end of the wire as seen in the picture on the right.
  
The left pictures shows what it should look like. Place a resistor (included in your kit) between the LED lead and the wire you just wrapped around the bulb holder and solder both sides of the resistor.
 
Here is a diagram that shows the layout of an LED correctly installed.
Figure out which way the LED is to be installed. Put the LED assembly (the LED and base) in the button and see if it lights up. If it does not light up, take it out and rotate it 180 degrees. Once you know which way it goes in, then bend the LED toward the front of the button and reinstall it. You may want to play with the angle that you bend the LED to get the button to light up as bright as possible.
*Important!*
- While soldering, do not hold the soldering iron to
the LED lead, resistor or the solder joint for more
than 3 or 4 seconds. If the solder does not make a good
contact, wait until it cools before heating it up again.
If you hold the soldering iron on the solder joint too
long, the resistor and/or the LED will become useless.
The resistor will go out before the LED will, we have included extra resistors in case you need them.
A trick
to help you solder the tiny resistors on the bulb holder
is to use your pliers to hold the bulb holder. Put a rubber band around the handle so it holds the bulb holder and use your tweezers
to hold the resistor into place with one hand while
you solder it with the other hand.
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