How to check the failure of sharp lcd-60c540a LCD TV
Author:Du Kangjian Time:2021-09-10 16:48 Browse(952)
1、 Here is an example, for example: the indicator light is on after the machine is turned on, but it is not turned on. The answers to the questions are as follows:
1、 Here is an example, for example: the indicator light is on after the machine is turned on, but the answer to the problem is as follows:
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①. First, measure whether the voltage after rectification and filtering is normal.

How to check the failure of sharp lcd-60c540a LCD TV

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②. Measure whether the voltage at the output end of the power factor correction circuit is normal.
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③. Measure whether the voltage at the output end of the auxiliary switching power supply circuit is normal.
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④ Measure whether the on / standby voltage is normal.
and whether the circuit elements such as the standby control transistor are normal.
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⑤ if the above measurement is replaced.
after the switching power supply circuit is restored to normal, the power on test machine fault is still present. In this case, measure whether the voltage to ground of all the DC-DC voltage conversion circuit chips on the motherboard is normal, If there is any abnormality, check the components around the chip's abnormal foot.
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sharp lcd-40lx620a is a 40 inch high-end LCD TV launched by sharp.
it has super crystal panel, LED backlight and uv2a technology, which plays a great role in improving the picture quality.
nbsp; The body of sharp 40lx620a LCD TV is made of metal.
the screen frame is wrapped with silver gray frame, which is full of sense of the times; In the upper left corner is the aquos logo, which is made of silver metal; sharprdquo; The logo is in the center of the bottom border; The loudspeakers are set at the bottom, slightly bent inward, which makes the body stable and thick.
sharp 40lx620a LCD TV adds led.
it improves the brightness and contrast of the picture, and at the same time, it has a good energy-saving effect.
in addition, sharp's unique light transmission technology "is added to the 40lx620a LCD TV; uv2ardquo;.
By precisely controlling the deflection direction of liquid crystal molecules, the utilization rate of light and the opening rate of liquid crystal molecules can be effectively improved, so that more light can pass through the liquid crystal panel, with higher peak brightness and clearer white; uv2ardquo; The technology can accurately control the light passing.
effectively suppress the light leakage phenomenon of backlight, and make the black deep and rich.
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the technology can also accurately control the light passing.
the technology can effectively suppress the light leakage phenomenon of backlight
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