Four basic principles of automotive electronics knowledge of car repair computer board
Four basic principles of car electronics knowledge of car repair computer boardhttp://www.ibuonline.com/category/Car-Electronics
No schematics status to carry out maintenance on an unfamiliar board, the so-called “experience” it is cast, despite with the circuit maintenance tester increase the probability of repair circuit boards, but if improper work is still less effective. So, how to do in order to improve the efficiency of maintenance? Based on years of maintenance experience in automotive electronics company, summed up the four basic principles, as long as you are methodical step-by-step operation, there must be helpful.
http://www.ibuonline.com/category/PersonalOffice-ElectronicsPersonal / Office Electronics tools: digital (or analog) multimeter, magnifying glass
Mainly to see when holding a circuit board to be repaired, good habits first should carry visual, if necessary, with a magnifying glass to see what?
1 broken? Whether there are traces of burnt?
Discrete components such as resistors, capacitors, inductors, diodes, transistors and other disconnected phenomenon exists?
Circuit board PCB connector cable is broken adhesions?
If anyone repair? Move which components? Exists Weld, weld, plug anti operator mistakes?
Determine the repair plate above situation, first with a multimeter to measure the resistance between the power and ground of the circuit board, usually board of resistance in the 70-80, if the resistance is too small, only a few or more than a dozen ohms components breakdown or part of the breakdown, it is necessary to take measures to find out the breakdown of the components on the circuit board. The specific measures to repair plate powered hand to touch the circuit board temperature of the device, will focus on hot suspect.
If the resistance is normal, fault detection with a multimeter. Caused by circuit board failure factors in a lot measuring board resistors, capacitors, diodes, transistors, FETs, rotary cam switches and other discrete components, its purpose is first of all to ensure that the components measured normal maintenance The principle is to can multimeter solve the problem, not make it complicated.
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