A TCL TV pulled back yesterday, booted the AV2 signal line, see the picture without sound failure. I had to remove the cover to detect the sound part. As a result, it was found that the volume control part inside the main computer IC chip was broken. In addition to changing the main chip, if you want to repair the sound, you really have to use your brain. (I don’t want to change the board)
Now I use the digital set-top box to watch TV. Just try to make a sound. For the volume control, use the set-top box to control the volume. After checking the TV amplifier position is normal, the AV conversion block 4052 is also normal. As long as the sound source is connected to the input end of the TV power amplifier block 4558 by means of a jumper, the television sound can be made. Just a flaw, the TV itself has no volume control. Unless a dual potentiometer is added to control, because there are L, R dual channel output.
Tell the user about this situation, the user also agreed to change. Charges: red and black. The patch cord modification diagram is as follows. After this modification, the test machine TV sound appears. What better way, everyone can talk about it. It can only be handed over to the user. In fact, this TV has been repaired before, because the motherboard screws only installed two, the other two are empty. The packaged iron cover of the main computer chip also has traces of disassembly. For the sound source to find this must have a certain theoretical basis, otherwise you can't change it.
Marine High Temperature Pressure Sensor
Product overview high temperature pressure sensor is a signal measuring element. The measured medium pressure is transmitted to the sensor through the heat dissipation structure on the transmitter. The high-precision signal processing circuit is located in the stainless steel shell to convert the sensor output signal into standard output signal. The whole product has undergone strict testing and aging screening of components, semi-finished products and finished products, with stable and reliable performance, so that the product can work stably for a long time when used for pressure measurement of high-temperature medium. Product features 1. 316L stainless steel isolation diaphragm structure 2. Imported high temperature resistant chip 3. Wide applicable medium temperature range 4. Strong anti-interference and good long-term stability 5. Direct contact with high-temperature medium to improve pressure response frequency 6. Provide rich pressure range of low pressure, medium pressure and high pressure
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Taizhou Jiabo Instrument Technology Co., Ltd. , https://www.taizhoujbcbyq.com