CORE_TECH

SONY / LG / SAMSUNG / VIDEOCON / SANSUI / PHILIPS / TCL SONY Colour Television Receiver Models:G-Series,J-Series,KV-G21M1,KV-G14F2RS,KV-2197M3(RM-870),KV-G14M1,KV-G14MD1,KV-G14P1,KV-G14P1,KV-G14P11,KV-G14Q1,KV-G14S1(RM-870),KV-J21MF1,KV-J21MH1,KV-J21MN11(RM-870),KV-2168MT,KV-2169MNT(RM-870),KV-XF29M35,KV-XF29M63,KV-XF29M93,KV-XF25M21,KV-XF25M63,KV-XF25M93 (RM-945).KV-XA21M80,KV-XA21M83.KV-XA21M50,KV-XA21M61,KV-XA21M60(RM-952),KV-XF25M81,KV-XF25M80(RM954),KV-F29MF1,KV-F29MH11,KV-F29MH31,KV-F29MN11,KV-F29MN31(RM-857),(RM-858) For entering into service mode: · Press the remote control key in the following sequence               STANDBYðDISPLAYð5ðVOL+ðPOWER · To raise/lower service item no: press numeric buttons “1” or “4” · To raise/lower data value: press: “ MUTING” Button on handset · To execute writing in memory; press “0” on handset · To cancel service mode ; turn the TV into standby by pressing “POWER” button on the handset, and then again switch on the TV by pres

FREQUENCY MEASUREMENTS USING PC  H ere is a simple technique for measuring frequencies over quite a wide frequency range and with acceptable accuracy limits using a PC. It follows the basic technique of measuring low frequencies, i.e. at low frequency, period is measured for a complete wave and frequency is calculated from the measured time-period. Cascaded binary counters are used for converting the high-frequency signals into low-frequency signals. The parallel port of a computer is used for data input from binary counters. This data is used for measuring time and calculating the frequency of the signal. The block diagram shows the basic connections of the counters and parallel port pin numbers on 25-pin ‘D’ connector of a PC (control register 379 Hex is used for input). External hardware is used only for converting the higher frequency signals into low frequency signals. Thus, the major role in frequency-measurement is played by the software. The PC generates a t