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Changhong TV maintenance
Source: http://xrqa.cn Author: Mianyang Changhong air conditioning after sales maintenance update date: 2015-09-07 22:39

Automatic shutdown of Changhong TV

Changhong TV users have reported that the TV general user has an automatic shutdown fault. What are the common causes of this failure? Now let's summarize some of the causes of this fault, which are mainly?

First, the power supply voltage of line oscillation is low. At this time, it is necessary to check the circuit of TV more often to make sure that the circuit of TV is in normal operation, so as to ensure the normal operation of TV.

Second, X-ray protection circuit causes automatic shutdown, which requires specific measuring instruments

3. The ABL circuit is open circuit. If this condition is the same as the above situation, it is necessary to pay attention to the inspection and the safety problems in the maintenance process.

4. Om8380 has poor performance. Among MS21 and MS25 movements, om8380 is used as digital video processing IC, which is easy to cause automatic shutdown due to its poor performance.

V. tda16846 is used as power supply. At this time, it is necessary to check the condition of relevant components and pay attention to the maintenance of relevant parts, so as to avoid the damage of other connected components caused by corresponding problems. Pay attention to the safety of circuit maintenance.

6. If s6856 machine is used for power supply, such as ar25228, at25211, etc., the automatic shutdown occurs. Check r8282 (4.7K Ohm) and d826 (9.1v) (poor thermal performance, which cannot be detected by multimeter).

7. Light back projection, such as dlp56r6, has automatic shutdown failure, most of which are poor bulb thermistor or color wheel, which can be replaced.

These are common causes of failures caused by automatic shutdown of TV. When dealing with the above problems, attention should be paid to safety problems, and maintenance should be carried out in time, so as to avoid other related problems caused by the expansion of TV failure or the expansion of the scope of damage to TV. For more problems, please contact Mianyang Changhong TV after-sales telephone number, We are dedicated to share your worries.

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