Step by step to fix error code 6502 on printer Canon GP-4000, GP-2000 and Canon GP-540, GP-520

Xin chào, tôi đang đối mặt với vấn đề cần giải quyết liên quan đến. Máy in model GP-4000, GP-2000, GP-540, GP-520 gặp lỗi "A printer error has occurred."... Cần step by step to fix error code 6502 on printer canon gp-4000, gp-2000 and canon gp-540, gp-520
 
Turn off the power and unplug the power cord. Wait a moment and turn the power back on. If the error appears again, make a note of the detailed error code (ECxx-xxxx) that appears on the touch screen, and then contact a Canon customer service center.
 
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