Installation guide

Troubleshooting
Getting Started with Troubleshooting
1-14
Figure 1-7 Pulsing Activity
J1-1, J30-7, J15-93
— If the signals in Table 1-7 are correct, replace the A3 Front Panel Auxilary Board.
(Refer to “A3 Front Panel Auxilary Board” on page 2-14.)
— If any of the signals are incorrect, use an oscilloscope to check J15 on the A23 Motherboard for signals
shown in Table 1-8.
— If the signals in Table 1-8 are incorrect, replace the A12 CPU.
(Refer to “A12 CPU” on page 2-30.)
Table 1-8
Signal State
J15-35 VLCD approximately 21 Vdc
J15-95 LCD_EN_L >3 Vdc
J15-24, 25, 28, 29, 32, 33,
36, 86, 90, 93, 94
Refer to Figure 1-4.