COLOR TELEVISION CAMERA APPARATUS WITH SELF-DIAGNOSIS FUNCTION

A color television camera apparatus wherein a video signal is adjusted by the steps of detecting adjustment data with respect to predetermined adjustment items from the video signal corresponding to the pattern of a test chart, comparing the adjustment data with reference data to obtain correcting data and supplying the correcting data to a video signal adjusting circuit. The correcting data is modified by variation data stored in a memory in advance and the modified correcting data is supplied to the video signal adjusting circuit. The difference between the video signals adjusted on the basis of the correcting data and the modified correcting data is then calculated and judgement is made as to whether the difference falls within a predetermined allowable range, whereby abnormality in the control system of the color television camera apparatus can be detected.