Figure below 7 is shown
：
The signal voltage of each chip can be measured
，
CORE VoltageLDO-1.8 or
、
LDO-1.8I
、
PLL-0.8
、
LDO-2.5I
Equal voltage:
CORE
：
0.4---When this voltage is abnormal
，
Generally the voltage domain of the chip CORE Short circuit
LDO-1.8 or
：
1.8---When this voltage is abnormal
，
The chip LDO-1.8 or Or LDO-1.8I Short or open circuit
LDO-1.8I
：
1.8---When this voltage is abnormal
，
The chip LDO-1.8 or Or LDO-1.8I Short or open circuit
PLL-0.8
：
0.8 in---When this voltage is abnormal
，
the voltage domain has a chip PLL-08 Power supply short-circuit, or LDO-1.8 Abnormal.
LDO-2.5I
：
2.5---When this voltage is abnormal
，
The chip LDO-2.5I Short or open circuit.
CORE
7, Chip peripheral test point and each voltage
3
）
According to the information on the diagnostics tool, the operational state of the Operation board, the chip arithmetic ability and the temperature
sense are judged.
3
、
IO Port
：
IO by 2X9 pitch 2.0 PHSD 90 The degree of straight-in double-row
composition. The individual pins are defined as the following figure 8 is shown
：
6
