Jingtaike 1288, 628 Satellite Receiver CPU Fault Emergency Maintenance Circuit

Published:2011/8/4 19:58:00 Author:Robert | Keyword: Jingtaike, Satellite, Receiver, CPU, Fault, Emergency, Maintenance | From:SeekIC

1.Using a 6V 4Ah maintenance-free battery to supply the 5V voltage for CPU and memory (shown in the picture) through two 1N4007 diodes for voltage step-down. The supply current is only 10mA, which would let the CPU and memory to work in a long time and keep the predetermined mode permanently. So that when starting again the CPU would not refuse the power supply.2.The power board +5V power supply voltage should be in series with a low-voltage-drop diode (such as 1N4148) and then it is connected to the main board. Otherwise when starting again, the power's +12V and Vcc voltage would be not normal.



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