The purpose of this letter is to show how to install a thermistor (part number RS00120-01) to prevent a circuit breaker from tripping at turn on.

Tools required:

• Wire Cutters
• Wire Strippers
• Soldering Iron
• Solder
• Approximately 4" Of 1/8" Diameter Heat Shrink Tubing
• Electrical Tape

To install the RS00120-01 thermal resistor (thermistor) perform the following steps for the appropriate game.

1. WARNING! Turn game power switch off and unplug line cord from the wall!
2. Remove the playfield glass and set aside in a safe location.
3. Raise the playfield to its full upright position.
4. On the transformer in the lower cabinet locate the black wire that connects from the primary windings to pin 1 of the 9 pin male Molex connector (reference figure 1).
5. Cut the black wire midway between the transformer and the 9 pin male Molex connector.
6. Strip approximately 1" of each new end created by cutting the black wire.
7. Cut 2 pieces of heat shrink approximately 2" long out of the 1/8" diameter heat shrink tube. Place 1 piece on each end of the black wire.
8. Wrap one end of the of the stripped ends of the black wire around one leg of the thermistor. Solder it in place. Pull the heat shrink tube up over the connection and shrink in place. After the tube has been shrunk use electrical tape at the top and bottom of the tubing to ensure that it is impossible for the tubing to move out of place.
9. Repeat step 8 for the other lead of the thermistor (reference figure 2).

1. WARNING! Turn game power switch off and unplug line cord from the wall!
2. Remove the playfield glass and set aside in a safe location.
3. Raise the playfield to its full upright position.
4. On the transformer in the lower cabinet locate the black wire that connects from the primary windings to pin 1 of the 3 pin male Molex connector (reference figure 3).
5. Cut the black wire midway between the transformer and the 3 pin male Molex connector.
6. Strip approximately 1" of each new end created by cutting the black wire.
7. Cut 2 pieces of heat shrink approximately 2" long out of the 1/8" diameter heat shrink tube. Place 1 piece on each end of the black wire.
8. Wrap one end of the of the stripped ends of the black wire around one leg of the thermistor. Solder it in place. Pull the heat shrink tube up over the connection and shrink in place. After the tube has been shrunk use electrical tape at the top and bottom of the tubing to ensure that it is impossible for the tubing to move out of place.
9. Repeat step 8 for the other lead of the thermistor (reference figure 4).