The machine USES the I2C bus control technology and field oscillation signal into the pillow first correcting circuit TA8859 plastic after correction, then sent to the output circuit. Use the oscilloscope observation input TA8859 waveform is normal, and TA8859 output waveform distortion seriously. Measuring the bus interface voltage is normal, damage of peripheral components did not see. The suspect was charged with circuit TA8859 internal control circuit damage. After replacing TA8859, grating, but the frame picture is too big, a linear, and the pincushion distortion. Ujdservice manual download site
Switch S1101 according to maintenance, repair the machine into the state, press S1103 function selection, field linear, pillow three projects in the school, with the volume up and down keys to adjust the data to the normal, according to the "normal" key to exit the maintenance state, everything is back to normal.Ujdservice manual download site