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Troubleshooting Microcomputer control device maintenance

Single failure and common signal processing is very important. From the 80's to the present decade, the central control station through a CMOS integrated circuit from the control, protection, transition to a computer control, cMOs integrated circuit protection stage. Thereafter and from a machine developed to the eight San l6-bit machine and computer, and the San present 32-bit machine, the control, protection, signal, measurement and communication together. All done by the San machines. One from the original four to the current Observing. In either mode which manufacturers control console. Common signal processing is much the same. I make some analysis of this issue for over duty and service officers. For normal operation has adjusted the control console, run over a period of time after failure. The general principle to repair it, nothing more than the replacement insurance or chips (or manifold). However, which specific to the film chip fuses or what a bad time. Analysis of specific symptoms is necessary. l re-election signals that the blocking signal is changed based on the station with the capacity and safety considerations when line maintenance, in order to prevent attendant simultaneously two or more circuit breaker tripping and closing the set. Resulting in the well associated with intermittent audio signal, it must check for more than two buttons and circuit breaker outside the state does not correspond, the key pressed corresponds to the closing state. Corresponding points to lift the gate state. Missed an alternate line circuit breaker. Button should be lifted. If the state corresponds to,[link widoczny dla zalogowanych], it is very likely to enter the on-board computer chip is broken. 2 machine-card protection signal that the signal is to protect the circuit breaker tripping coil in the jam and set up burning when Buzhi Yu. No more than 3s operating circuit breakers open or close the Municipal, the signal will appear at this time, and time cards to be cleared. Such as the removal can not afford to, most likely corresponding chip is broken. 3lOkV system ground signal is present the signal, the attendant should check the three tables indicate whether the system voltage is normal. In case of two-phase high. One phase is low, there are lines to ground. Explore the function of the ground through the computer will be able to automatically find the line,[link widoczny dla zalogowanych], or man-made platform to find the breaker. Lift ground, the signal will go away, if the signal. Three-phase system voltage and normal, then the exchange of insulation monitoring board has the chip is broken, the replacement will solve this problem. In addition,[link widoczny dla zalogowanych], if the PT fuses fuse pressure, or less of a phase voltage into the line. Will also appear in the signal. 4 tripping unsuccessful attendant often encounter this phenomenon, computer self-test if normal, then there are several agencies tripping phenomenon-a_, b. Not switch on power, c. Controlled power to vote, d. Blown fuse. e. Implementation of a bad relay, f, circuit breakers at both ends of the internal diode Tripping Coil piercing. 5 grade trip stuck mainly to institutions or setting the time and size mismatch. Need to adjust the value of the time and size. The monitor does not display, the printer does not print self-test is not successful and other failures,[link widoczny dla zalogowanych], refer to the manufacturers of the product service manual can be solved. * 45 *
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