6881094C12-A November 11, 2004
Performance Checks: Radio Test Mode 4-5
4.2.3 Control Top Test Mode
This test mode is used to verify proper operation of all radio buttons and switches if a f ailure is
suspected.
To perform the control top checks:
1. Press and hold the green button on the control top: the display is backlit, the radio icons are
displayed, and the LED lights red.
2. Release the green button: “3/0” appears, which indicates that the green button is in the
open position.
NOTE:Your radio is now in the control top test mode.
3. Press and hold the green button again: “3/1” appears, which indicates that the green button
is in the closed position. Release the green button.
4. Rotate the Channel Select knob: “4/0” through “4/15” appear, which indicate that the select
knob is in any of the channel positions from 1 through 16.
5. Cycle through the Channel Bank Select (A/B/C) switch settings: “67/0”, “67/1” and “67/2”
appear.
6. Rotate the On/Off/Volume knob: “2/0” through “2/255” appear. The display values may vary
slightly at the upper and lower limits.
7. Press and hold the top side button: “96/1” appears; release: “96/0” appears.
8. Press and hold the two-dot side button: “97/1” appears; release: “97/0” appears.
9. Press and hold the one-dot side button: “98/1” appears; release: “98/0” appears.
10. Press the PTT button: “1/1” appears; release: “1/0” appears.