By inspecting the high-frequency head has been damaged. Change after high-frequency head, receiving sensitivity returned to normal, to search again, all units can search and storage. 8Niservice manual download site
 8Niservice manual download site
Checked the tonal anomaly of fault, with the eraser to the tube after degaussing spots disappear. But still color aberration. When a character image, people face a violet. Input color bar signal, its ribbon in the order: purple, yellow, red, green, blue, green, and normal color bar for: yellow, blue, green, purple, red, blue). The tube each cathode instantaneous short circuit to ground, tube can correctly display the corresponding monochromatic grating. Tube is proved to be the problem is that circuit parts. Single input R, G, B three primary signal, screen display, R, G, B respectively gezer, picture color is not normal, the fault may be out in the color decoding part. Measuring IC601 - MC13584SP the road resistance and voltage values of each foot are unable to determine whether it is normal. Substitution of chromaticity delay line is invalid. Because have little MC13584SP integrated block, then decided to use the existing music of TC - 21 l12r color TV (circuit structure with 2188 - almost the same movement) in the same kind of IC - TA8844N change, commissioning. Constant fault phenomenon. And carries on the comparison to two machine circuit, also cannot find the malfunction. The maintenance of before. Red, green and reciprocity failure is encountered, color reversal phenomenon, namely the input color bar signal shown in the color bar order and normal order of striped opposite, namely the striped sequence into blue, red, purple, green, blue, yellow) also dealt with. Appear the phenomenon of PAL switch did not work. The fault in the above phenomenon, and is related to the internal data storage change? Ever seen in related electronic newspapers and color anomaly due to memory data change. But the machine is not bus control models, should not have this possibility.

 3    1 2 3 Next Last