LG MC74AADJ free download

File name MC74AADJ.PDF

ADJUSTMENT INSTRUCTIONS Y Safety precautions 2. VCO (Voltage Controlled Oscillator) 1. It is safe to adjust after using insulating transformer between Adjustment the power supply line and chassis input to prevent the risk of Test Point : Observing display electric shock and protect the instrument. 2. Never disconnect leads while the TV receiver is on. Adjust : A-PLL (SVC-0 mode) T 3. Don't short any portion of circuits while power is on. 4. The adjustment must be done by the correct appliances. 1) Input the COLOR BAR pattern with RF frequency is But this is changeable in view of productivity. 175.25MHz and 65dB. 5. Unless otherwise noted, set the line voltage to 2) Press the OK buttons on both of Control Board and 100~ 270Vac, 50Hz. Remote Controller at the same time to get into SVC-0 mode. Y Test Equipment required 3) Press CH UP/DOWN (T/U) button to select A-PLL . T T 1. VIF sweep generator/Alignment scope 4) Press VOL +( ) button and the VCO will be adjusted T 2. Color bar/cross-hatch pattern generator automatically. 3. DC power supply 5) Press OK(Y) button to memorize the adjusted data. 4. Digital multi-meter 5. Color analyzer 6. Oscilloscope 3. RF AGC (Auto Gain Control)Adjustment 1. SIF adjustment Test Point: TP1 (J173) on Main Board DC POWER 10K