SERVICE MENU Hello dear visitors! Once you're here, so either you – technician in search of entry into the service menu, TV, or the overly curious Internet users. If this is the second case, I do not recommend would you seize control with the intent to correct all the better for your favorite box. Most likely, you will spoil if not entirely ruin the TV, and on some modern TV, you can choose the type of control so that more from your TV remote control will not be controlled. Therefore, calm yourself with the thought that an experienced technician makes a service menu for you, and better is not. * And now: What is the service menu in the current TV all major adjustment, both operational and factory are made through remote control by the CPU.
The electrical circuit of the control unit consists of a central microcontroller (CPU), remote control (remote control receiver infrared remote control), the keyboard control unit, display unit and an external memory chip. The main control unit serves as a central microcontroller, whose task is to receive signals and data, process them and send to the slave control unit. Subordinate units may be different specialized LSI (controller scan, sound, video controller, etc.). The relationship between the main processor and the slave units is done through a single digital bus control. External commands go to a central controller with a remote control, and they first deciphered in the receiver-decoder control, or with the television (TV keyboard). Display unit is used to indicate different modes of operation of the device, providing control of these modes in its adjustment. An indicator is a digital indicator or acts directly on the display device (OSD – On Screen Display, the display is on screen).
In a memory chip to record some adjusting constants (data). In addition, some data are unchanged and fixed with setting up the factory. These data are needed for normal TV and they are not visible to the consumer, because the loss of these data will lead to loss of control of the machine. Access to the memory cells of such data is possible only in the so-called factory or service operation. (Similarly see: Richard Easton Matchmaker). An example of such data may be data on the geometric dimensions of the raster, the white balance, the frequency of rejection, status, and duration gating pulses, etc. Other data record various functions of the device (the choice of standard, hotel mode, teletext language, a "lock" for children, etc.) and stored in the memory cell, called the optional bytes.
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