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ADJUSTMENTS IMPORTANT NOTICE
Do not attempt to adjust the following service adjustments except when adjustments are required in servicing otherwise it may cause loss of performance and product safety. + B VOLTAGE ADJUSTMENT 1. Receive white raster pattern. 2. Set controls to normal. 3. Connect digital voltmetre to test point TP-B and GND. 4. Adjust voltage to 130 ±0.5V by using VR641.
DRIVE ADJUSTMENT 6. Select item no.3 �REGULAR 3, GRY� (G-Drive) or 4 �REGULAR 4, GRY� (B-Drive) and adjust both initially to 3F. 7. Change data value of each item by using LEVEL + or LEVEL - button to obtain the proper white balance.
AGC ADJUSTMENT 1. Connect digital voltmetre to test point TP-A and GND. 2. Using the CS button, input and tune an RF signal which is VHF to the clearest station. 4. Press the LEVEL+ or LEVEL - button to adjust voltage to be 3.2Vdc. 5. Enter to the service mode and select mode �REGULAR�, and select item no.1 �REGULAR 1, AGC�.
FOCUS ADJUSTMENT By using FOCUS VR, adjust focus control for well defined scanning lines.
GREY SCALE ADJUSTMENT SCREEN ADJUSTMENT 1. Receive black & white pattern. 2. Enter to the service mode and select mode �REGULAR�, and select item no. 2 �REGULAR 2, CUT�. The horizontal line will appear on the screen. 3. Using the numeric buttons shown set each colour to minimum by decreasing to the point where any further decrease resets the adjustment to maximum value. 4. Set the SCREEN VR for one colour to be just visible. BIAS ADJUSTMENT 5. By using the buttons 1, 2, 4, 5, 7, 8 on the remote control, adjust the line to be white. The key allocation is as follows;
Button No. Operation 1 Increase Red 2 Decrease Red 4 Increase Green 5 Decrease Green 7 Increase Blue 8 Decrease Blue
-10C2KZV
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