Page 10 - 1.Antminer L3+ Hash Board Repair Guide EN

6. DC-DC Circuit: Composed of LM27402SQ and CMOS tube TPHR9003NL. See below Fig 15
and Fig 16:

Fig 15. DC-DC Schematic Diagram

Fig 16. DC-DC Circuit

DC-DC output voltage testing points are the two ends of capacitance C948

When the voltage of DC-DC is abnormal, firstly check the consistency of voltage value of PIC and DC-
DC output voltage through tool print information; if they are inconsistent, replace the low capacitance
around LM27402SQ;