Troubleshooting Touch-and-Go (TnG)

1. Bring the cradle to the home position.
2. Select the Patient Setup tab on the IRD.
3. Press a TnG button, and verify that a dotted vertical line appears at the approximate position where you pressed the button.
4. Press and hold the Advance to Scan button (on the operator panel) until the cradle moves into the bore approximately 18 inches. (The amount of time that you need to hold the button depends on which TnG button you pressed.)
5. Release the Advance to Scan button. The cradle should continue moving into the bore until it is at the landmarked position.

The TnG Diagnostic is found on the SRI functional diagnostic menu.

When a TnG strip is pressed, the diagnostics page displays the ADC value read.

The following table shows an example of the ADC values you may see during the diagnostic.

The ADC value should return to its original value when the button is released. In the example above, the left TnG value should return to 3187, and the right TnG value should return to 3196.

The following illustration shows a block diagram for TnG.

See TnG Switch Replacement for information about removing the TnG assemblies.

The following illustration shows a schematic of the TnG strips.

With a jumper wire connected to pins #1 & #2 of the female connector on TnG Strip, use an ohmmeter connected to the male connector to verify that the resistance.