S19 Maintenance Guide
6
Figure 5-1
Second step: to check the voltage output in the voltage domain
The voltage of each voltage domain is about 0.36V. If there is 14V power supply, generally it has domain voltage. The priority is given to
measure the output of the power supply terminal of the hashboard and whether the MOS is short-circuited (measure the resistance between
pins 1, 4 and 8). If 14V has power supply but no domain voltage, continue to check.
Figure 5-2
Third step: to check the PIC circuit
Measure whether there is output on the second pin of U3 and the voltage is about 3.3V; if yes, please continue to troubleshoot the problem;
if there is no 3.3V, please check the connection status of the hashboard tester cable and the hashboard is OK, and reprogram the PIC.
It will take 2ms to increase to 24.5V.
It will take 1.9ms for simulation increase
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