At the same time field amplitude reduced, picture pause a mosaic, serious epidemic is not synchronous, protection shutdown, firing line pipe.uscservice manual download site
First, replace the DG board fault invariant, measured voltage output voltage is normal, the heating circuit board fault still. Suspected U plate has a problem, but have no replacement. Measurement of A4 seats each foot level using the oscilloscope, found 8 feet SCL2 is only 3.3V, A1101 block 28 feet only 3V (normal 5V), remove the U board test of resistance, 27 feet and 28 feet of 8K, only 2.2K, with iron heating LC1101 for resistance rose to 8K, the test machine 2 hour fault appears again, after replacement of the LC1101 test machine for several days to normal.uscservice manual download site