2. ADJUSTMENTS 2-1. Adjustments to be done Adjustments Necessary equipment Adjusting block 1. VCC2 voltage adjustment Power supply, Digital multimeter (FD730C) Video unit 2. Contrast adjustment Power supply, Pattern generator, Signal generator, Oscilloscope Video unit 3. Tint, Color adjustments Power supply, Pattern generator, Signal generator, Oscilloscope Video unit 4.
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3. Tint/Color adjustment Video signal Oscilloscope 33kw CP313 Video Output Input CP337 1) Ground CP313 via 33k ohm resistor. 2) Unsolder (open circuit) IF pad HP200. Pulses 2 and 3 are adjusted by TINT While pulses 1 and 4 are controlled byCOLOR. 3) Apply 75% color bar signal to video input of the set.
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6. VCO Free run adjustment CP757(VCC4-2) Set + monitor Power supply Frequency counter CP756 Input Output DC12V CP181 1) Adjust power supply voltage so that CP172 voltage becomes 11.5 ± 0.05V. 2) Connect CP756 and CP757 (VCC4-2). 3) Connect a frequency counter to CP181 and adjust VR751 so that the counter reading is 15.73 ± 0.1kHZ. 7.
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9. Brightness adjustment Oscilloscope Pattern generator Set + monitor Output Input CP803~CP805 Video CP802 Trigger 1) Apply color bar signal to video input terminal. 2) Provide trigger pulse from CP802 to an oscilloscope. 3) Connect the oscilloscope to CP804 terminal. Observing the oscilloscope, 4.0 ±...