Today, I repaired the Human Digital E-press 1600 Printer. Its main board hoson cob eps r800_4 v2.51.01 was water damage. That's why it was showing error code (A) on board. When I clean the main board with mbc and dry sold all components. After this, the printer status is changed now it showing error code (3). Then, I found one sensor was damaged too. I changed the sensor. Now the printer is working again. Job done

I am sharing some pictures in which you can see the error

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