LG 068aadj free download

File name 068aadj.pdf

ADJUSTMENT Y Safety Precautions 1. It is safe to adjust after using insulating transformer between the power supply line and chassis input to TUNER 6700VPV002A(LG C&D) 6700VPV002B(LG C&D) prevent the risk of electric shock and protect the AGC Voltage 2.5 ! 0.1V 3.0 ! 0.1V instrument. 2. Never disconnect leads while the TV receiver is on. Default AGC Data 24 24 3. Don't short any portion of circuits while power is on. 4. The adjustment must be done by the correct appliances. But this is changeable in view of productivity. 5. Unless otherwise noted, set the line voltage to 230Vac!10%, : Screen Voltage Adjustment 50Hz. Test Point : RK (Red Cathode of CPT Board) Y Test Equipment required Adjust : Screen Control of FBT 1. RF signal generator (with pattern generator) 2. DC Power Supply 3. Multimeter (volt meter) 1) Input the Color Bar Pattern into Antenna jack. 4. Oscilloscope 2) Select CutOff of SVC-3 mode. 5. Color analyzer 3) Turn the screen control clockwise until the Horizontal line is visible and turn it counterclockwise until the Horizontal line is faintly visible. : RF AGC (Automatic Gain Control) Adjustment Test Point : AGC TP (J17) : Focus Adjustment Adjust : Remote Control NOTE: This adjustment should be performed after warming up for 10 minutes. The RF AGC was aligned at the time of manufacture for optimum performance over a wide range conditions. Test Point : Observing Display Readjustment of RF AGC should not be necessary unless Adjust : Focus control of FBT unusual local conditions exist, such as ; 1) Channel interference in a CATV system. 1) Input the Color Bar Pattern into Antenna jack. 2) Picture bending and/or color beats, which are unusually 2) Adjust the Focus control of FBT for best overall focus. due to excessive RF signal input when the receiver is too close to a transmitting tower or when the receiver is connected to an antenna distribution system where the RF signal has been amplified. In this case, the input signal : VCO Adjustment