LG 058aadj free download

File name 058aadj.pdf

ADJUSTMENT Y Safety Precautions 1. It is safe to adjust after using insulating transformer between the power supply line and chassis input to PAL/SECAM-BG SYSTEM PAL-BG/DK PAL-I prevent the risk of electric shock and protect the SECAM-LL' instrument. 2. Never disconnect leads while the TV receiver is on. TUNER 6700VPF002A 6700VPF002B 6700VPF002B 3. Don't short any portion of circuits while power is on. AGC Voltage 2.3 ! 0.1V 2.3 ! 0.1V 2.1 ! 0.1V 4. The adjustment must be done by the correct appliances. But this is changeable in view of productivity. NOTE: AGC must be adjusted when the tuner was changed. 5. Unless otherwise noted, set the line voltage to 230Vac!10%, 50Hz. : Screen Voltage Adjustment Y Test Equipment required 1. Multimeter (volt meter) 2. Oscilloscope Test Point : RK (Red Cathode of CPT Board) Adjust : Screen Control of FBT : RF AGC (Automatic Gain Control) Adjustment 1) Tune the TV set to receive a digital pattern. 2) Press PSM (RED) button on remote controller. (standard Test Point : AGC TP (J3) picture) Adjust : Remote Control 3) Connect the probe of oscilloscope to the RK (Red Cathode) of CPT Board. 4) Adjust Screen Volume of FBT so that the waveform is the The RF AGC was aligned at the time of manufacture for same as below figure. optimum performance over a wide range conditions. Readjustment of RF AGC should not be necessary unless Horizontal unusual local conditions exist, such as ; FlyBack Time Black level 1) Channel interference in a CATV system. 160Vp-p 2) Picture bending and/or color beats, which are unusually due to excessive RF signal input when the receiver is too close to a transmitting tower or when the receiver is White level