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you for all. TVs use LED back or side lighting and do not have a large bulky back light and do LCD TV Power Supply (IP BOARD) Schematic Diagram &. We will show in this book that drawing the human body need not be so difficult. in interpretive point of view, it allo led lcd tv / lcd tv / plasma tv. instructions in the literature accompanying . as gasoline or candles, or expose the TV to direct air . The owner's manual in PDF file format is supplied.
At the same time, the Main board will also process the audio signals and amplify it and send to the speaker. This is a very important section in Main board. This section will received the voltage supply from the Power Supply board and generate the appropriate DC voltage to other system use. These signals can driving the LCD Panel to working and generate the complete display in the screen. After that, convert it into several voltages and supply to the T-con board and also to driving the LCD Panel too.
Some of the settings. Whenever you replace a main board or lcd panel. Sound is normal. Inverter Board Part Code: Suspect their CCFL lamp defective.
These defects are often not immediately obvious and may be discovered by the customer days after the repair. This will happen several times. After 2 seconds. Use the CCFL tester to testing the lamps. Option Bytes mainly match the correct drive to the panel. The inverter board 24V input voltage also OK. So the problem looks like is the inverter board. After that TV Shutdown. Power on the TV and it is working properly. When checking their front button. HV Transformer and caps all are OK.
The TV owner said this TV has water by his children. When Power On the TV. Use the alcohol to cleaning these buttons. Try to re-program their flash memory but no help.
Try to using the Remote Control or front button also not working at all. Replace the crystal X BGA type or the crystal X Use the ISP Programmer. Try to re-programmer their firmware. So the last suspect is maybe their Main Chipset U So suspect the TV is their firmware corrupted.
When testing this TV, after about 1 hours, the sound will randomly on and off, after that totally no sound. Because of this TV after warm up the problem will occur, and then suspect that Main board Audio section has component sensitive with heat increase.
Try to using the Hair Dryer to shoot to the Main board Audio section and found that just using about 10 minutes, the TV no sound symptom occur. So confirm that the Audio section is the causing this symptom.
After the hair dryer shooting to Audio section, it is slowly drop to 0V and the sound gone! Use hair dryer to concentrate shooting on this circuit and found one SMD capacitor C 1uF leakage and sensitive in heat increase. After replace this cap, the TV no sound problem solved! So trace these two lines to the Tuner section and found that Tuner socket got two pins was shorted. After re-solder these two pins, this TV problem solved!
But they are never provided more details or information about the TV. So that you need to know about these:. After that, power on the TV to look at their symptom is it same describe as the customer complaint. If the TV problem same as the customer describe, so we can start to check the TV now. If the TV symptom is different than what customer describe, then we need to call the customer first before proceed it. When an abnormally occurs in TV, the self test protection circuit will operate and reset the unit to standby mode.
So their TV. LED light blinking 1 times then stop 2 seconds and continue to blinking 1 times. But not all the service manual will show their error chart. So you need to search other nearest model service manual to compare with it. If not. They are: So you need to check their PSU board first. Or you need to do the components level repair. For the Power Supply Board. The Power Supply board will generate several output DC voltage supply in their secondary side and supply it to Main board.
Tuner Vcc and all analogue and digital circuits use. CPU Vcc. These signals can driving the LCD Panel to working and generate the complete display in the screen.
This section will received the voltage supply from the Power Supply board and generate the appropriate DC voltage to other system use. At the same time. This is a very important section in Main board. After that. CPU core power. But it can divide to 4 parts: For example: TV Tuner. Finally the TV can show the display now. After press the power on switch button in Front Panel board or remote control. CPU and the Front Panel board.
The TV is in the Standby Mode now. If you think your skill is not enough to do that. But the actual situation is we need to know the PSU board has output all the voltages correctly.
If their Standby voltage 5V is appear but other voltages are no output then you need to check the Main board and the Front Panel board. So that still need to checking the PSU board secondary side output voltages is normal and stable or not. Check the power cord and the fuse also. If you have learned the V3. If it is appear Vac or Vac.
If not you need to check the AC plug main switch is press ON or not. If the Vac or Vac appear. If the Vcc voltage appear typically it is 12V or 5V. For this symptom. If these signals appear. For example the HDMI section.
If not appear. So that we can confirm it ImagineX ElectronicS.
In this case. Regarding this type of symptom. AV section and etc. If want to do the components level repair. So replace a working T-con board to give it a try. If not stable or abnormal.
With this tool. This type of problem is same as the 3 a.
So just replace the T-con board and the problem solved. Because some repairer after they replace the T-con board and solved this type of problem. Besides the FPC cable. This type of TV problem. The above information is just for the repairers who want to repair the TV in board levels repair only. If you need to do the components levels repair. This type of symptom is causing by their Main board firmware setting or firmware corrupted.
For this type of TV symptom. I had checking their voltage outputs properly and values are stable too. Some repairer may said. But after download a new Main board to replace it. The Main board problem like: From the above TV symptoms.
For the DC-DC circuit.. But most of the repairer after doing step No. For some repairer. Or try to replace the crystal and give it a try. For example the 1. So the acceptable voltage values for 1. So what will cause the CPU not working or working abnormal except the voltage input not correct or not stable?
If a bit different voltage values. After you learn this tip. But from lots of the Main board repair case. So the TV repairer will think this output voltage is ok and can be trusted Because of the Multimeter and Oscilloscope not detect any abnormal values or waveform there. The Flash Memory voltage input also same too.
If the Ripple Voltage is below 10mV. So just replace the old electrolytic capacitor in the circuit with a new one. The values of that capacitor should be same or a bit more capacitance than the old one. But the TV screen is always no display. After open the rear cover.
So confirm that the problem was in TV Main board. The steps to checking the TV Main board are: PSU board and the backlight system are working properly! Below is the voltage output value of this Main board: When the backlight lit about 10 seconds. But TV problem still the same and no change! So continue to checking the CPU reset circuit and the crystal waveform. When checking the Crystal. The Reset Circuit is operating properly. So suspect this Y1 crystal 12MHz is failure and tries to replace it with a new one.
Make sure these signals are reach to the CPU there. Also check their control signals and the clock signals in between to CPU there. WE and CS. After checking all these signals and the voltage inputs.
Sometime these signals will break in half way. This Vref voltage is about 0. These Control signals are: The Clock signal like: CPU or just replaces a new Main board. The last remaining is replacing the DDR Ram. I highly recommend to backup their old firmware first before replace it with the new one. One more thing. Finally this TV problem solved!
Starting now. It will save your time and the money too! If all voltage outputs normal and stable. The other ceramic capacitors all looks like good. This TV even burn test several days.
Finally this TV problem was solved. But some time it can work properly! Even try the repair tip procedure on 1 above. When the problems occur.
When the TV auto shutdown. But the problems still same. Actually this problem is easy to solve. For more details on how to do that. Their Main board is ok. The front LED light will flashing Red. Unless you change the Main board. Green then Red again and non-stop or etc.
So this is an exception case of the Main board problem. Besides to using the Programmer to send data or firmware to memory IC. Actually all electronic component inside the PCB board. So this information is to let you know. But some time it is difficult to do that. Please make sure that it is using the same IC packages. The 24C08 can replace 24C04 and 24C And it can work very well. But the 24C32 cannot replace 24C Because some different packages.
For more details. The 24C64 can replace 24C KOR and KS. Write Protect have two kinds of method to connect it. The 24C can replace 24C64 and 24C Actually it is using the part number or calls it as marking code. PCF pin7 need to connect to ground.
Besides the DIP packaging. N8 24CS Also make sure that the pins are same. So recommend to read their IC datasheet to compare it first before replace it. If the number is different. They are many flash memory manufacturers in the market now. ShangHai Fudan Microelectronics: Most of the TV and Monitor Main board flash memory manufacturers are: A25xxx series. But in this chapter. MX25Lxxx series. They are many type of the flash memory use in the Main board.
Chingis Technology Corp. Vcc input voltage and their pins configuration. Actually to find the substitute flash memory IC you must follow these rules and successfully to replace it. Because of this flash memory EN25T80 density is just 8Mbit only. Not recommend to use 64Mbit or Mbit to replace it. So the Main board firmware is missing half of the data and cause the firmware corrupt. So we can use the W25X16 16Mbit to replace it. This section will received the voltage supply from the Power Supply board and generate the appropriate DC voltage to other system use.
These signals can driving the LCD Panel to working and generate the complete display in the screen. After that, convert it into several voltages and supply to the T-con board and also to driving the LCD Panel too. After that, this 3. The TV is in the Standby Mode now. Finally the TV can show the display now. If not you need to check the AC plug main switch is press ON or not.
Wi-Fi disconnection 2. Wi-Fi Module replacement 2. Check Voltage 3. N Check the Camera wafer P pin no. Normal Operating? N If un-paired. Then un-paired. If paired. LED should blink 3times. Method 1. Method 2 Repairing. To re-pair Press OK button.
Press "BACK"button for 5 sec. To bring up cursor. Maximum communication distance: Explain the customer cause is interference from light in room.
When checking the Pre-Amp when the power is in ON condition. Check the st-by 3. Check the 3. ADJ Key Adjustments method after Repair Step 1.
Check menu Non-Smart TV model. Upgrade TV a. Make sure file is unzipped before placing in Folder f. Make sure file is unzipped before placing in Folder c. Check a label on TV Side or Rear Check full model name of your TV Select one a.
Press Home key on remot. Press MENU key on remot.
Flag for inappropriate content. Related titles. Jump to Page. Search inside document. Red light or Turn Off - Power on Condition: No Power Check check method 1. A-Dim LED: Malay K Ghosh.