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XJP-10-type speed digital display instrument from the school Troubleshooting

Check the C, C, C. Preferably quantitatively measuring the AC capacitor bridge the main parameters. If any one capacitor has a parameter does not meet the requirements, should be replaced with new capacitors the same size. Apricot repair gun above, such failure can be ruled out. From the maintenance of the actual situation, due to decline in the capacity of C or breakdown arising from such failures are quite common. (Anhui Province Product Quality Supervision, Inspection and Xu Chongxin) XJP a digital display device 10 type speed troubleshooting from a school XJP a 10-type speed digital display device is powered from the press with the provisions of the school, the use of different time-based criteria, in addition to 0.1s file shows the normal measurement time, the rest of the files are not properly displayed (all \Constitute a self-calibration circuit of quartz crystal oscillator, the time scale divider, time base divider,[link widoczny dla zalogowanych], the control circuit, counting the door, such as decimal decoder unit count, it was discovered a problem with time-base divider. Then using the \Decimal number in CZ9 board input frequency input signal into account the technology in 1991. N03 [39) number, but the output value of shabu almost no power, but also less than the voltage waveform Xinjiang capsule, which confirmed that the board failed in CZ9 number. \AJj Table 3G1, 3G2 tube normal static and dynamic voltage control '3 G1 Tube 3G2 3G2 3G1 tube pipe the very \ -3.5 ~ a 4-3.5 ... jC O.2-7.5 swinging a pole swing + O .1 ~ +} O.1 ~ + b great a swing of 0.15 O.35 + O.70.15 put e works very OOOO'CZ9 number plate shown in Figure 1. It is guided by the four double-door steady-state circuit of the 8421 code of trigger 'way. a \collector were observed in less than the corresponding waveform. inferred faults in the first stage within the bistable circuit. carefully examined the first stage bistable circuit (Figure 2). 3.G1, 3G2 tube voltage line work in the table. multimeter measuring tube with static electricity F T hide the end of the table to kiss sets, just 3Gi, 3G2 pipe delivery equipment in good condition and then check the resistance from the home to guide the door,[link widoczny dla zalogowanych], 2G1 (2AK10J), 2G2 (2AK10j) tubes are intact. with a multimeter Do not be A,[link widoczny dla zalogowanych], B, c carried out tests and found: = a 1.75v (fibrillation), V = a 3 to a 4V (swing), less than pure. oscilloscope in the A, B two observations to the voltage waveform, No point in C waveform. which determine the fault for the damage caused e. with a 750pF mica capacitor to replace the original C:, speed digital display instrument from the school returned to normal (Fuel Injection Equipment Factory Jinjiang measured physical and chemical snapped Hu Xuepei) EWY-103 electronic potentiometer We pin a case of poor maintenance of a 103 EwY electronic potentiometer with the monopoly of wisdom (the instrument, the same below),[link widoczny dla zalogowanych], after warm-power, full-scale input signal, the pointer at the smallest end of the scale, and the pointer to the smallest end of the reversible motor to rotate, only occasionally shake up the look by adding several times the full scale of the signal, the pointer moves slowly toward it. To this end, the failure to be checked. subject to verification, instrument appearance of the visible part no problem, however, questioned the fault lies in the signal input circuit, . Therefore, the power meter off, turbulence in the thermocouple signal input with a multimeter (× i00Q file) measurements, the results multimeter only stopped at the smallest scale pointer position to confirm the signal input circuit short circuit,[link widoczny dla zalogowanych], combined with the principle circuit (see Figure) analysis, instrument within the filter CL, CL:, CL and measurement bridge is unlikely to focus on the fault type vibration ZBB suspected a problem with the converter. To do this, and look for root causes of failure, that poke amplifier connection plug EC, to find the EC:., EC. \ two points, first with the determination of EC-purpose socket before the sad part, no short circuit, and then plug in the EC EC:., EC.. points to the amplifier section is measured, the result pointer to the multimeter the smallest scale at one end, prove ZBB problems. So, apart amplifier, measuring C., no problem, check the ZBB contacts, indeed 4,5-side short circuit. shall be adjusted on the ZBB. Vibration sediment control variable adjustment method can be found in the correct the books. factory converters without vibration tester, using the following simple method.

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