Screwdriver tool set
Soldering iron
Host power supply
The BOARD master is as follows: ASUS X8AC Intel CUP 4 U9 Northbridge SIS M672 Southbridge SIS968 Board No. K40C MAIN BOARD REV2.1 Capacity 25VF088
20140910, the peer brought an Asus X8AC, connected to the adjustable power supply 19 volts, standby current 0.033, feel is a little high, I do not know, and then press the switch without any reaction, 12345, regardless of it, disassembly again, this machine is easy to disassembly, can be convenient, disassembly people understand. Soon the board was removed, and here's what I did:
1: Measure the resistance value of each major inductor, normal. 2: Connected to the power, measured 3.3 volts, 5 volts, and one 1.8 volts are out. 3: The switch 3.3 volts is also available, and there are jumps when pressed. 4: The two feet of crystal vibration measurement, actually are 0.3 volts, that is, there is no pressure difference, is it broken, in exchange, the material board did not find the crystal vibration of this, just hand welded a desktop computer. 5: Power on, standby 0.007, startup current three times jump, display. 6: ash cleaning, installed. 7: Copy machine.
When operating the circuit board, pay attention to the safety of electricity