| 摘要 |
PURPOSE:To prevent the malfunction due to the frequency shift of the internal clock of a terminal equipment, by changing the frequency of the internal clock of the terminal equipment in a prescribed direction. CONSTITUTION:When the frequency of the internal clock of a terminal equipment becomes lower, address data from a main operation panel is not reproduced correctly. In this case, a counter C0 of a frequency adjusting part 28b counts pulses, which are outputted from an astable multivibrator M oscillated by the input of a malfunction detection signal NO, and the time constant of a time constant circuit CR consisting of a resistance R8, a capacitor C2, and one of resistances R9-R16 is changed by this count output to change the frequency of the internal clock outputted from an internal clock generating part. |
