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 Posted: Tue 8:59, 07 Dec 2010 Post subject: ugg stivali Shanghai Johnson & Johnson, the black |
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,[link widoczny dla zalogowanych]
Shanghai Johnson & Johnson, the black meter malfunction analysis to determine
Electrical Company developed verification tests, Harbin 150036) Abstract: This paper describes the display of Johnson & Johnson meter principle and fault diagnosis. Keywords: taxi meter; fault; analyze and judge since 2000, Harbin, Shanghai Johnson & Johnson replaced a large number of the meter. The meter not only look great, versatile, also achieved with computer networking, IC card can be settled. Meter black machine is called the \(1) hardware fault mainly refers to the fault line. The more common are the key to the door +12 V; battery power +12 V and ground fault these three lines. Generally have the following possible three-terminal ① bad: There may be bad or the ground loosen the insurance. ② fuse: fuse blows, the insurance can not be simply replaced one of the over. There are several possible blown fuse: a. Host internal short circuit; b. Sensor short-circuit wire with the body. ③ Connector bad: general power supply wire color is red then the battery power, then the key to the door of green, black ground. When you are familiar with the color of the wires of these functions, the search for cause of the malfunction to be much more convenient. (2) soft-meter failure is mainly a hardware failure within the circuit. Figure 1 Figure 1 from the circuit theory point of view, the meter lights up to be successful must have the following conditions: ① CPU (89C52) crystal oscillator must be from; ② 9 RST pin must be reset signal; ③ 12 feet IN1D must have 0 ~ 1 transition signal; @ CPU to identify the machine after the original sign of loss of power. Then these conditions who completed? In general: the circuit components in the MC34064, PCF8583, U5: 74HC14 and capacitor C9 (10U/10v), C11 (1U/50V), etc., of crucial importance. Because the MC34064 is a loss of power detection circuit. Its working principle is: when the power meter when the capacitor voltage can not be mutated c9 top. Therefore,[link widoczny dla zalogowanych], U5: 74HC14 3 feet slowly increased the voltage from 0 to 1. In U5. . 74HC14 6 feet, 12 feet or CPU as the voltage increased to 1. At the same time, in the U5: 74HC14 8-feet, that is, CPU 9 feet, 6 feet 74HC14 followed by a jump to 0. CPU reset, it is the first thing to do from the u3: 8583 to read the last loss of power in 8583 when a sign in the store. Because in 8583 there are 256 bytes of RAM memory, its loss of power interruption when the power failure when the field data and the meter empty or loaded car at the time the state has set a flag stored in the RAM memory 8583 Lane. If more than a few components out of order,[link widoczny dla zalogowanych], then the meter is not naturally bright. Author: Xie Haibin,[link widoczny dla zalogowanych], male. Engineer. Company: Harbin Measuring Electrical Company developed verification tests. Address: Zhujiang Road Xiangfang District, Harbin 150036 5. Received :2007 -08-02 quantitative for packaged goods business and manufacturing illegal businesses, corporate penalties to be imposed? A: production, distribution and labeling prepackaged goods without the correct net content shall be ordered to rectify; the net content is not marked, the deadline correct, fails to do, and be liable to a fine of 1,[link widoczny dla zalogowanych],000 yuan; the production, distribution quantitatively tested packaged goods, the mark does not match the amount and the actual amount, a fine of 2,000 yuan fine.
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