2 Instrument Configuration
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49
Table 2-4 Other indicator lights on the main control panel
Position Code of
Indicator Light
Meaning
Normal Status
D79
It indicates the ARM working status and flashes after
proper system loading.
Flashing
D90
It indicates the FPGA working status and flashes after
proper system loading.
Flashing
D52
It indicates the MPU working status and flashes after
proper system loading.
Flashing
Indicator lights are very useful in practice; hardware problems can be identified by the status of the
indicator lights. For details, see
2.3.1.5 Identification of Main Control Panel Problems
2.3.1.4 Testing Points on the Main Control Panel
There are two types of testing points on the main control panel: Digital and analog.
Digital testing points
The digital testing points on the main control panel listed here are commonly used ones, in particular
for power supply and key signals.
Table 2-5 Digital testing point on the main control panel
Position Code of
Testing Points
Description
TP15
The testing point for 5V digital input, with the expected voltage of
5V
TP9
TPS65910 VRTC output, with the expected voltage of 1.8V
TP61
DDR3 reference voltage, with the expected value of 0.75V
TP7
TPS65910 VDIG1 output, with the expected value of 1.8V
TP8
TPS65910 VDIG2 output, with the expected value of 1.8V
TP6
TPS65910 VAUX33 output, with the expected value of 3.3V
TP5
TPS65910 VMMC output, with the expected value of 3.3V
TP3
TPS65910 VAUX2 output, with the expected value of 3.3V
TP4
TPS65910 VAUX1 output, with the expected value of 1.8V
TP1
TPS65910 VDAC output, with the expected value of 1.8V
TP2
TPS65910 VPLL output, with the expected value of 1.8V
TP20
The testing point for 3.3V digital power supply, with the expected
voltage of 3.3V
TP19
The testing point for 2.5V digital power supply, with the expected
voltage of 2.5V
