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FAQS
After the radio frequency statistics of major cities in the country, it is found that the 94.4MHz band is empty in most cities, so the recommended frequency is set to this value. The recommended frequency may not be the best choice for your region. You can manually increase or decrease 0.1MHz to adjust the car FM to a frequency free from radio interference. At the same time, remember to use Netease Cloud Music APP to adjust the car Bluetooth player to the same frequency. If it sounds very good for a while, you are welcome to share your city and frequency with us through the "About" - "Feedback" of Netease Cloud Music APP. We can optimize the recommended frequency to users in your city during software iteration.
-Please confirm that the car stereo is not at the lowest volume;
-Please click "Set Frequency" and adjust the car radio frequency to the same value as the car Bluetooth player frequency after resetting;
-Please confirm whether your mobile phone has been bound to another Netease Cloud Music on-board Bluetooth player, and the bound Netease Cloud Music on-board Bluetooth player is near your mobile phone. At this time, you need to drive away from this area and reconnect or disconnect the Bluetooth connection to try to connect your own on-board Bluetooth player;
-Adjust the on-board FM to a frequency, then adjust the on-board Bluetooth player frequency to the corresponding frequency through Netease Cloud Music APP, and click OK;
-Please check whether there is ash residue in the cigarette charger. If there is, please clean the cigarette charger before inserting the product;
-Please re plug and unplug the Netease Cloud Music on-board Bluetooth player, and wait for the logo light to flash;
3. No "Cloud Music Car Bluetooth Player" Bluetooth is found in the mobile phone system Bluetooth
The logo light flashes: the on-board Bluetooth player is waiting for Bluetooth connection;
The logo light is always on: the on-board Bluetooth player has successfully connected to the mobile phone;
-Both states can charge your mobile phone, tablet and other electronic devices;
This may be the case that there is a problem in contact with the power supply. The chip of the power supply is damaged, and its capacitor will burst. We're going to need the first
First disassemble the machine, carefully check whether the motherboard is burned, and then carefully remove the damaged components with a hot-air gun
Then, use the multimeter to test whether 2P and 3P of TD1410 are short circuited, and connect the multimeter to test whether the power supply pin of 8202RQ is intact
Check whether the 720C power supply pin is short circuited. Finally, replace a power supply chip after checking all the conditions
Excluded. However, pay attention to the cause of this fault, which is capacitor short circuit due to large current. Therefore, pay attention to the stability of current when using
Qualitative.
In this case, first check the power supply of the fuselage to see if the movement reacts,
You can continue working after the TV is replaced
Made. This may be caused by the loss of data, as long as the data is rewritten.
Maintenance idea: 27M crystal oscillator is abnormal and FPC is in poor contact. In DVD, the crystal oscillator frequency is usually 27MHz, which is used for CPU
DSP, D/A and other electronic components with computing processing or storage capability provide clock signal (high frequency) internally for timing, loading, mixing, etc
Use. The clock signal is an important factor for the operation of the whole machine. Whether the clock signal is normal or not will affect the normal operation of the whole machine (usually the machine is started
Colorlessness is also caused by abnormal crystal frequency)
The working principle of this circuit is the same as that of previous DVD clock circuits. XI is clock output, connected to pin P234 of MT1389, and XO is clock output
It is connected to P233 pin of MT1389.
Solution: check whether the crystal oscillator has a differential pressure, the cable is in good condition, and replace the 27M to remove the fault.
Experience summary: Some motherboard data may be out of color due to confusion, such as 720 25X10 memory data.
1) Before maintenance, the user shall be carefully asked about the use condition and fault phenomenon of the machine to determine the fault location. Through understanding the situation, we can accurately judge the fault location to avoid detours in maintenance.
2) Understand the characteristics of DVD and its working principle. Understanding its characteristics before maintenance can be a reference for maintenance improvement.
3) Pay attention to keep the maintenance workbench clean, dust-proof and anti-static. If the air environment is bad, too much dust on the surface will affect its disk reading performance, so it is necessary to keep it clean during maintenance.
4) Note whether the working principle of DVD is consistent with the grid voltage. The working voltage of some imported machines in normal channels is 110V/60Hz. If 220V/50Hz voltage is used directly, they will be damaged.
5) Pay attention to personal safety and the safety of maintenance equipment. DVD is mostly powered by switching power supply. The power supply part has 220V AC voltage, and the hot part is live. If you don't pay attention to it during maintenance, you will get an electric shock.
If the product has faults not listed above and cannot be eliminated, you can call the customer service phone for help during working hours.