Received a Hisense TLM32V76, the fault phenomenon is that there is no sound when booting. Obviously, the backlight is faulty. This machine is not a separate high voltage backlight. Instead, the two-in-one LIPS power supply is used. Roughly smashed the circuit and found that this is not the simple transformer power amplifier circuit. Simply put, the backlight power amplifier uses the 380V power generated by the PFC boost. Measuring 12V, 5V is normal. There is no flashing when the backlight is turned on. Generally, the backlight circuit board is faulty. If the lamp is faulty, it is flashed. (This is not a 100/100 statement, please don't shoot bricks, no helmets. So, first check the circuit part. After measuring one lap, no obvious abnormalities were found. Only one power tube pushes the G pole to ground resistance value is too large. Remove the power field tube and retest the resistance value, which is to push the transformer part.
The test pushes the transformer secondary two ways to have an open circuit. This ghost is a tormented guy. I can't look at the red grandfather's share and do it.
Finally, it was fixed.
Every time I repair things, I am exhausted and bitter. .
DB25 Female Connector, DB25 Male Connector,DB9 Male Connector,DB9 Female Connector,DB9 Right Angle Backshell,Molded D-Sub Cables
The On-site injection molding enables us to custom mold your D-Sub assemblies to your specs with logos. We are tooled for:
DB9 molded cables,,DB25 molded cables, DB50 molded cables, HD15 molded cables
DB Backshell or Boot-Kit Cables: The backshell cans and boot-kits are available for D-Sub DB15 cablesD-Sub DB37 cables.
Backshells are offered for: D-Sub high-density HD26, HD44, HD62, HD78
D-sub cable, DB cable, 9pin DB cable, molded DB connector, Data Cable
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