Which kinds of breakdown to computer be " deadly " ? You should notice

As advocate board circuit is compositive those who spend is ceaseless rise reach advocate board of the price reduce, its but maintainability is lower and lower, but master full-scale maintenance technology to be opposite rapid judgement advocate board breakdown and maintenance are other circuit board still is very necessary. Common advocate board the classification of breakdown has:

(1) basis can be divided to the influence of computer system for mortality breakdown and blame mortality breakdown. Mortality breakdown happens during systematic electrify self check, bring about; of systematic dead plane to be not mortality breakdown to also happen during systematic electrify self check commonly, give an erroneous information commonly.

(2) differs according to incidence can divide for local sex breakdown and global sex breakdown. Local sex breakdown points to systematic certain or a few functions move abnormal, be like advocate board on attaint of chip of the control that print, cause only online print abnormal, what do not affect breakdown of sex of overall situation of other function; to often affect whole system is normal move, make its lose all function, if clock generator attaint will make,whole system breaks down.

(Whether is 3) stabilized according to breakdown phenomenon can divide for stability breakdown and instability breakdown. As a result of,stability breakdown is yuan open circuit of invalidation of function of parts of an apparatus, circuit, short circuit is caused, because the contact is undesirable,stability of its breakdown phenomenon repeats breakdown of occurrence; instability often is, yuan function of parts of an apparatus becomes poor, make chip logic function is in from time to time the critical condition with normal, abnormal from time to time and cause, if insert groove to be out of shape as a result of I/O, cause indication card and this contact that insert groove undesirable, distinguish assumes the wrong position of metabolic adventitious.

(What 4) basis affects rate is different can divide for independent character breakdown and dependency breakdown. Independent character breakdown shows the chip that fulfils single function damages; dependency breakdown points to a breakdown and additionally a few breakdown are relevant couplet, its breakdown phenomenon is many sided function abnormal, and its breakdown essence appears to control the common share of all functions breakdown is caused, work like subsystem of soft, hard disk all abnormal, and its function control is relatively detached on card of control of soft, hard disk, breakdown often is in advocate board the peripheral data that go up transmits control namely DMA dominates circuit.

(Breakdown generation source can divide 5) basis to wait for breakdown of power source breakdown, bus line breakdown, component. Power source breakdown includes advocate board on + 12 bend over, + 5 bend over and + the stoppage of breakdown; component that power source of 3.3 bend over and breakdown of bus line of; of breakdown of Power Good signal include breakdown of bus line itself and bus line to control authority to arise includes etc of chip of resistor, capacitance, integrated circuit yuan.