About 10 cm on the upper display grating, about 1 cm wide scan line is thinning, and a wave of rolling. For this phenomenon is caused by the low frequency interference, the relevant circuit as shown in figure. So doubt filtering bad field output circuit power supply circuit, but change C764 is invalid. Measuring IC68l each foot line voltage as shown in table 3. Random provide drawings given in each foot IC681 voltage line 2 are shown in table 1. Through the principle analysis on the original machine drawings given IC681 (2), (4) feet voltage is obvious mistake, 7 feet it was unknown whether the voltage error, so it can't make judgment on the measured data. Decided to use the method of shunt capacitance further judgment. Because C689 is convenient for operation, the first in C689 position and on a 1000 pf capacitor, grating no improvement not only the upper part of the scan line is thinning, and instead of increasing, cannot to judge the stand or fall of C689 according to this phenomenon. xFmservice manual download site
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Each foot IC681 voltage (V) xFmservice manual download site
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A foot xFmservice manual download site
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All landowners xFmservice manual download site
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The original machine drawing stated value xFmservice manual download site
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120 xFmservice manual download site
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Fault state measured values xFmservice manual download site
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12 xFmservice manual download site
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