Diagnostic mode Use diagnostic mode to check the functionality of LEDs, the control panel display LCDs, and to check the firmware version. Note Diagnostic mode is available for firmware version 2.2 or higher. To gain access to diagnostic mode 1 Unplug the product from the power source. 2 Press and hold down V OLUME , S TOP /C LEAR , and 1 on the one- touch keypad simultaneously. 3 Continue to hold down the keys while you plug back in the product, through the entire power-on sequence. The table below shows the tests and key sequences to perform in diagnostic mode: Table 15. Diagnostic mode key sequences To perform this test . . . Press these keys . . .
Toggle LED1 on/off 1 or 5 on the one-touch keypad Toggle LED2 on/off 2 or 6 on the one-touch keypad Access LCD pattern 1 (solid fill) 1 on the numeric keypad, , or > Access LCD pattern 2 (empty fill) 2 or 8 on the numeric keypad Access LCD pattern 3 (> fill) 3 or 9 on the numeric keypad, or R EDUCE /E NLARGE Access LCD pattern 4 (H fill) 4 on the numeric keypad or 3 or 7 on the one-touch keypad Access LCD pattern 5 (frame fill) 5 or 0 on the numeric keypad, or R ESOLUTION Access LCD pattern 6 (check fill) 6 on the numeric keypad Access LCD pattern 7 (ROM check) 7 on the numeric keypad or R EDIAL / P AUSE Access firmware version number # , * , or 10 on the one-touch keypad 176 Chapter 6 - Troubleshooting EN