Sometimes can work normally low luminance color TV Hitachi CHF 321 or the signal is weak; but when the high brightness or when a strong signal is received, immediately "fault repair method -" |
| Time£º2014-07-22 09:40:56 Source£ºNetwork Author£ºUnknown Clicks£º1317 |
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NJyservice manual download site
Power supply voltage rise when a "squeak" cries, it shows that the power switch frequency change, is most likely to lose power supply circuit "horizontal frequency flyback pulse signal control. When powering thick film is measured with a multimeter (4) feet" line output transformer "to (1), (2) feet between resistance (see figure 1) found that" stuff "(2) feet coated copper copper wire has desoldering! After welding is good, color TV work back to normal. NJyservice manual download site
NJyservice manual download site
NJyservice manual download site
Due to the secondary line output transformer (1), (2) the foot to part of the power supply line flyback pulse control signal is "cut off", make the power oscillation frequency of free vibration frequency, oscillation frequency changes with the change of the load will be! The results make the output voltage increase along with the increase of load. When the output voltage rises to 150 ~ 160 v, overcurrent or overvoltage protection circuit action, make the power "off". If the voltage exceeds 160 v, it is possible to make the pipe or breakdown ignition coil, so will cause the user said the continuous burning of malignant fault of the ignition coil and pipe. NJyservice manual download site
NJyservice manual download site
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