| 摘要 |
An improved image forming apparatus for data communication system which makes it possible to keep on signal transmission by changing signal transmission path in relation to the operating conditions of the apparatus. The apparatus is constructed with an image signal processor, an input/output unit for governing input and output of signals between the image signal processing device and signal transmission path, first power source for supplying electric power to drive the image signal processor and the input/output unit, and second power source for supplying electric power to the input/output unit when the first power source is not in operation.
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