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Now downloading free:LG Lg tv DI-28Z12

LG Lg tv DI-28Z12 free download

TV - Conventional CRT, LCD Projectors, TFT, Plasma, Big Screen, HDTV, Home theater - Service manuals, repair tips

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ADJUSTMENT Y Safety Precautions 1. It is safe to adjust after using insulating transformer between the power supply line and chassis input to Test Point : J189 or Observing Display prevent the risk of electric shock and protect the Adjust : VR101 instrument. 2. Never disconnect leads while the TV receiver is on. The RF AGC control (VR101) was aligned at the time of 3. Don't short any portion of circuits while power is on. manufacture for optimum performance over a wide range 4. The adjustment must be done by the correct appliances. conditions. Readjust of VR101 should not be necessary But this is changeable in view of productivity. unless unusual local conditions exists, such as: 5. Unless otherwise noted, set the line voltage to 230Vac!10%, 50Hz. Y Test Equipment required AGC TP. IF Board 1. RF signal generator (with pattern generator) 1[EA] J189 2. DC Power Supply 3. Digital Multimeter (volt meter) 2[EA] Tuner Digital 4. Oscilloscope 2[EA] Multimeter 5. White balance meter 1[EA] VR101 (AGC ADJ.) : VCO (Voltage Controlled Oscillator) Adjustment Fig. 2 : Connection Diagram of Equipment for AGC Adjustment. 1) Channel interference in a CATV system. Test Point : J72 2) Picture bending and/or color beats, which are unusually Adjust : L107 due to excessive RF signal input when the receiver is too close to a transmittin



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