2 Instrument Configuration
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ARM OS on the main control panel fails to boot
The ARM on the main control panel boots from NAND using its default factory setting, so the
booting media selection switch S6 should be turned to NAND (i.e. OFF state for DIP switches),
as shown in Figure 2-43.
Figure 2-43 ARM booting and running
1 - DIP switch status
2 - ARM normal working
indicator light D79
When the ARM OS is booted properly, the working-status indicator light D79 will flash on the
main control panel. If D79 is not lit up, it means that the ARM OS has failed to boot.
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MPU program loading fails
When the MPU program is booted properly, the working-status indicator light D52 will flash on
the main control panel. If D52 is not lit up, it means that the MPU program has failed to boot. The
location of D52 is shown below.
Figure 2-44 Location of D52
1 - MPU status indicator light
