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9. Brightness adjustment
Pattern generator
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,
adjust VR805 so that the voltage level between
positive and negative pedestal is 4.0 ± 0.1V.
4) Perform the same adjustment on CP803 with VR800.
5) Perform the same adjustment on CP805 with VR803.
10. Contrast adjustment
Pattern generator
1) Apply color bar signal to video input terminal.
2) Provide a trigger pulse from CP802 to an oscilloscope.
3) Observing CP804 waveform with the oscilloscope, adjust VR804 so that
voltage level between pedestal and white level is 2.7 ± 0.1V.
11. Monostable multivibrator
Pattern generator
1) Apply color bar signal to video input terminal.
2) Connect CP760 to an oscilloscope as a trigger.
3) Observe CP760 and CP181 signals at the same time. Adjust VR750 so that
delay time between the two pulses is 1.0 ± 0.6µsec. (in case of kx-650) and
0.0 ± 0.8µsec. (in case of kx-660).
Set + monitor
Output
Input
CP803~CP805
Video
CP802
Set + monitor
Output
Input
CP804
Video
CP802
Set + monitor
Output
Input
CP181
Video
CP760
— 5 —
Oscilloscope
Trigger
4.0 ± 0.1V
Oscilloscope
Trigger
2.7 ± 0.1V
Oscilloscope
Trigger
0.1 ± 0.1µ sec
CP760
CP181
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