Installing Pedal Mods Boss TR-2 Mod Kit

CAUTION: Read all these instructions before beginning, if you pedal is currently under warranty it will not be after these mods. This kit and the instructions do not include any warranty of any kind and you agree to hold harmless the seller of this kit against any and all claims.

Thank you for purchasing the TR-2 Supreme Mod Kit. After these mods you will not believe it’s even the same Pedal. Included are all the components necessary for total tone transformation, it replaces key components in the signal path to turn your TR-2 into a serious tone machine.

There is also a new LED to replace the red one, it will not change the tone of the pedal, just change the color of the light. It’s a special bi-color led that when installed with glow in time with the rate in blue and will be bright green when the pedal in engaged.

There are two versions of the TR-2 and this kit is for both versions, you will have some parts left over, the two versions are easy to tell apart and instructions for both are included.

Open up the back and take a look inside. There is the main circuit board and a tiny board that only houses the LED. There is no need to remove the jacks or pots for this Kit.

After the board is exposed it’s time to start removing components and replacing them with the new ones. Make sure the battery is removed and no cables or AC- adaptors are plugged in. On the following steps are a detail of both versions of the TR-2. Follow the instructions for the version you have.

These are the instructions for the older TR-2, if your PCB looks different than this the instructions are on the next step

The LED in the kit has 3 leads. The shortest lead is the Green Light, the center lead is the common positive, the longer lead is the Blue Light. Insert the LED into the old LED holder with the short lead going to the green wire and the common (center) lead to the red wire, connect to the white lead and solder for the version of the TR-2 you have.

Note: Replace R37 exactly as shown in the detail. Take the white wire and connect it to the blue side of the LED the other end of that wire goes to R37 as shown in the detail. This is what makes the LED flash in time with the rate of the tremolo.

These are the instructions for the newer TR-2, if your PCB looks different than this the instructions are on the previous page. If your PCB looks like this you will have the 47k resistor left over.

The LED in the kit has 3 leads. The shortest lead is the Green Light, the center lead is the common positive, the longer lead is the Blue Light.

Insert the LED into the old LED holder with the short lead going to the green wire and the common (center) lead to the red wire, use the short piece of heat shrink to insulate the lead for the Blue Light, connect to the white lead and solder for the version of the TR-2 you have.

Note: I like to replace J3 with a little bit longer wire so it’s easier to connect the lead for the Blue LED.