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KCeservice manual download site
KCeservice manual download site
This case fault phenomena shown in the color bar order is really confusing, suddenly remind of the motherboard of the machine and put a plate between the video signal of attachment plug E32 seems to have a trace of welding. Whether man-made fault? Inspect the relevant parts immediately. Found near the apparent put board signal lines among three had been cut burned her fork to the welding, and heat shrinkable tube on interface set of sets. The row of five line, in the order: 12 v power supply, B primary output, G primary output, R gezer output, grounded. Five lines in addition to the first line 12 v power supply for the white, the other four are blue, it is difficult to distinguish them with the naked eye, but from the circuit board by mark symbols, mainboard and depending on the board's pin function is one-to-one relationship. Using a multimeter to measure, found that only article 1 and article 5 of the connection is correct, the other three lines are wrong, the motherboard (2), (3), (4) feet, respectively, and put the plate (3), (4), (2) connected to the foot (i.e. IC601 tricolor output were wrong: the blue color output connected to your green: green primary output connected to red gun; red primary output connected to the blue gun, resulting in a color abnormal fault phenomenon. Take three connected after the wrong line accordingly. Boot figure color returned to normal. KCeservice manual download site
KCeservice manual download site
The machine repaired, found in the commissioning process degaussing is not complete, with external magnetic intentionally made magnetic screen, repeated several times on all cannot complete demagnetization. Check the degaussing resistance did not see unusual, after its change new fault remains. Check the dc resistance of degaussing coil is only about 10 Ω, and unstable, compared with other two similar models. Found that the dc resistance of degaussing coil around 27 Ω, obviously had a partial short circuit degaussing coil, make provide degaussing magnetic field is insufficient, can't eliminate tube with the residual magnetism. Because of the color TV degaussing coil resistance varies with different models vary widely, from several European to dozens of European is possible. Common degaussing coil structure has two kinds: one kind is a single fixed around the tube explosion protection with a rectangle coil, near the degaussing magnetic field parallel to the ground, the requirements of the large degaussing current, dc resistance, generally within a dozen European, multi-purpose at 21 inches below the machine; Another is around to turn it into a figure 8, half fixed in the upper portion of the tube, and the other half is fixed at the bottom of the tube, the synthesis of degaussing magnetic field perpendicular to the ground, demagnetizing effect is good, adopted by most of the models. The dc resistance is bigger, usually around 20 Ω ~ 30 Ω.
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