| 摘要 |
<P>PROBLEM TO BE SOLVED: To easily and rapidly judge which one of control signal systems is abnormal which are the systems for a plurality of information display means constituting a pattern display means. <P>SOLUTION: When picture display control is started by the pattern display means 22 after power source supply, a special pattern display means 23 and a normal pattern display means 24 are each displayed as a whole black picture (Fig. (a)). A control signal for a normal pattern is received and the whole picture black display is stopped in the normal pattern display means 24 by the time that a set time by an error display timer elapses. When a control signal for a special pattern is not received even after the set time passes, the abnormality of a special pattern control signal system is displayed in the special pattern display means 23 (Fig. (c)). <P>COPYRIGHT: (C)2003,JPO |
