How to resolve/fix error code 6700 Canon GP-300, GP-200, GP-5300, GP-5200 step by step??

Xin chào, tôi muốn hỏi về cách giải quyết vấn đề. Máy in model GP-300, GP-200, GP-5300, GP-5200 gặp lỗi "A printer error has occurred."... Cần how to resolve/fix error code 6700 canon gp-300, gp-200, gp-5300, gp-5200 step by step??
 
Make a note of the detailed error code (ECxx-xxxx) that appears on the touch screen, and then turn off the power and unplug the power cord. Contact your Canon dealer for assistance.
 
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