SERVICE ADJUSTMENT
RF AGC Adjustment 1. Receive a good local channel. 2. Enter the service mode signal category and select the service adjustment "AGC". 3. Set the data value to point where no noise or beat appears. 4. Select another channel to confirm that no noise or beat appears.
CHROMA ADJUSTMENT
No. Adjusting point Adjusting procedure/conditions SUB-TINT (I2C 1 1. Receive the "Color Bar" signal through AV in. BUS CONTROL) 2. Connect the oscilloscope to TP47B (Pin (5) of P882) BLUE-OUT. Range : 10 V/div. (AC) (Use probe 10:1) Sweep time : 10 µsec/div. 3. Call the "SUB-TINT" mode in service mode. Adjust the "SUB-TINT" bus data to obtain the waveform shown as Fig 1. 4. "SUB-TINT" bus data decrease 4 steps to get final waveform. (Fig 2.) 5. Clear the SERVICE mode. Waveform and others
WAVEFORM 1
SAME LEVEL
W Y CY G MG R B
Fig 1
Fig 2
HORIZONTAL AND VERTICAL DEFLECTION LOOP ADJUSTMENT
No. Adjusting point Adjusting procedure/conditions V-SLOPE (I2C 1 1. Receive the Monoscope Pattern Signal. BUS CONTROL) 2. Call the "V-LIN" mode. 3. Increase or decrease "V-LIN" by Volume key till the horizontal line in the center of monoscope is just at the position where the blanking starts. 2 V-CENTER (I2C 1. Call the "V-CENT" mode. BUS CONTROL) 2. Increase or decrease "V-CENT by Volume key till the picture is centered. Waveform and others
3 V-AMP (I2C 1. Call the "V-AMP" mode. BUS CONTROL) 2. Increase or decrease "V-AMP" by Volume key to set overscan to 10.0% typical. Adjustment Spec 10.0% range ± 1% 4 S-CORRECTION (I2C BUS CONFIXED DATA, NO NEED TO ADJUST. TROL) 5 H-CENTER 1. Call the "H-CENT" mode. 2. Increase or decrease "H-CENT" by Volume key to center the picture horizontal. 1. Receive the "Monoscope Pattern" signal. 2. Press the R/C to set Picture NORMAL condition.
6 Focus Adjustment
3. Adjust the focus control to get the best focus.
