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US5027135A Printer self-diagnosis device 失效
打印机自诊断设备

Printer self-diagnosis device
摘要:
A self-diagnosis device provided in a printer that detects more than one error among a plurality of functional mechanisms provided in the printer, with one process. Test devices are provided for testing the functional mechanisms, and a control unit operates the test devices to detect an error, even if errors have been detected in other functional mechanisms.
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