| 摘要 |
If printing is commenced while a relay is supplying power supply voltage from a battery to a power supply controller, a control circuit outputs a power supply switching prohibition signal to a permission/prohibition circuit. Even if an AC adapter is connected during printing, the relay will not be switched by an ON signal from an input voltage determination circuit. Once the printing is completed, the power supply switching prohibition signal is stopped, and a switch is made to power supply input from the AC adapter. As a result, even if an AC power supply is connected during printing, this will not cause the printing to take a longer time, and will prevent a decrease in printing quality.
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