It is the function and feature of cell phone jammer | china cell phone ...

March 1, 2013 doadmin cell phone jammers

The design method can not only accelerate starting speed of the cell phone jammer system
Refer to the circuit diagram found that the C411-C422 is connected to the display interface, and put a little rosin blowing hot air gun to melt capacitors, clean washed, power test machine, the display is completely normal, contrast can be adjusted. Estimated that this machine has dropped, so this part of the capacitor Weld caused the failure. Models: Samsung N188 mobile phone. Fault phenomenon: End will display. Analysis and Maintenance: Replace the display invalid the disassemble measurements show some VCC3V, the RST voltage is normal, with the N188 upgrade software to write data after the fault is still, after accidentally enter * # 0523 # ?to adjust the contrast, actually show up slowly, by careful adjustment, troubleshooting. And the program can be transmitted to the main machine of cell phone jammer by the far-infrared communication.
Mobile Phone Repair Training ? Chapter 10: The phone displays the failure of maintenance. GSM mobile phone LCD main role is to reflect the information and work status of the phone to the user, allowing users to phone through the display of information to understand the current state. Maintenance practice, the phone does not display, display abnormal failure is more commonly encountered, this chapter, Motorola, Ericsson, Nokia, Samsung mobile phones, for example, the description is not displayed correctly on the failure analysis and repair. Common mobile phone display circuit analysis and maintenance and repair methods to correct for the display circuit, and quickly repair the display circuit. Manpower to be from the working conditions of the display, the display must be able to display properly, you must meet the following conditions. So that main machine of cell phone jammer can automatically run according to the switching time set by the program.
Display all the pixels can emit light. To meet this condition, you need to display the power of work (generally marked VCC, VIII workers G,) for Motorola cell phones, generally there is a negative pressure supply side. Available power supply voltage multimeter measurements. Display pixel can be controlled only all pixels can be controlled on the display screen to properly display the desired content. The serial interface circuit (such as Ericsson and Nokia phones), the control signal including the LCD-DAT (display data), the LCD-CLK (clock), the LCD-RST (reset) three signal; parallel interface display circuit (such as Motorola and Samsung mobile phones). It is the function and feature of cell phone jammer .
The control signals include eight data lines (D0-D7), the address line (ADR), reset (RST), to read and write control (W / R) cell jammer, start control (the LCD-EN). Whether the display circuit of the serial interface or parallel interface circuit, the failure of these control signals, generally there is no display, showing the failure of the insufficiency and so, by measuring the maintenance of the control signal waveform analysis and judgment.

cell jammer

Source: http://www.cellphone-jammer-china.com/it-is-the-function-and-feature-of-cell-phone-jammer/

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