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Boot Up and Initialization Troubleshooting
Potential Problems During Boot Process
Figure 2-7 A1A2 Front Panel Interface Board LCD Backlight Inverter Control Voltages
Table 2-1 Expected Backlight Inverter Control Voltage Levels
Signal Expected Voltage
Brightness Control
0 to 3 VDC
a
a. On newer analyzers, the backlight is a string of LEDs, rather
than a fluorescent tube. The brightness control voltage for the
LEDs ranges from 0 to 2.5VDC, rather than 0 to 3VDC. If the
A1A2 Front Panel Interface board installed is either
W1312-60042 or N9020-60033, expect this voltage to range
from 0 to 3VDC.
Inverter Enable >6 VDC
Inverter Supply +12 VDC
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