LG M64AAI free download

File name M64AAI.PDF

ADJUSTMENT INSTRUCTIONS * Safety precautions * VCO (Voltage Controlled Oscillator) Adjustment 1. It is safe to adjust after using insulating transformer between the power supply line and chassis input to Test Point : JP4(L504) prevent the risk of electric shock and protect the instrument. Adjust : VL501 2. Never disconnect leads while the TV receiver is on. 3. Don't short any portion of circuits while power is on. 4. The adjustment must be done by the correct appliances. 1) Turn on DC power supplies. But this is changeable in view of productivity. 2) Adjust VCO ADJ. coil(L501) so that the level of Picture 5. Unless otherwise noted, set the line voltage to 220Vac+_ Carrier (PC) may be at the lowest position as shown Fig. 20%, 50/60Hz. 2. *Test Equipment required SC (Sound Carrier) : 32.5 MHz 1. Swee p Generator 2. Marker Generator(38.0MHz: Picture/32.5MHz: Sound) 3. Alignmen t Scope(5121A) 4. Patter n Generator(PAL/SECAM) 5. DC Power Supply 6. Color analyzer 7. Multimeter(Volt meter) PC (Picture Carrier) : 38.0 MHz Preparation for VCO Adjustment Fig. 2: Output waveform on Alignment Scope 1. Connect the measuring equipment to the TV as shown in Fig. 1 2. Set RF output level of Sweep Generator to 90dBuV. NOTE: When performing this adjustment, if there are 2 adjusted point in VL501, select the lower core position. * R