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the printhead is original mimaki printhead?

plz wipe off the materials,head connection side remove the static.

static disturbances possible, if you have electrostatic altimeter， you can test it, if you do not have, please use the brush to wipe off the static 2. The disturbance also may come from the data cable , mother board, head board.

the print out photos were from your epson printer or mimaki cjv30 printer? the mimaki printhead printed out the photots or the epson printhead printed?

only print other colors except yellow one, let's observe other colors situation. so need to remove the yellow cable. Good luck, waiting for your further news.

the horizontal banding is the ink supply problem, check the nozzel test, check the dampers.better to upload your nozzle test.

exchange the head cables, like from yellow to blue to check if blue can print out.

the control chip on the mainboard have problems. Please first remove the yellow head cable, and print other colors to check the printing.and let me know the result.

1. can print out the nozzle test? If can ,please upload it. 2. you can check the head cables, if they are not folded or any ink on the connection, which will not be admited. 3.the head is new head ? 4.consider the headboard problem.

thanks for your photo, i thought the vp540 designed for 2 heads, meantime, the headboard is designed two groups of channels. From your photo, only one group channel, then we cannot check the headboard through change cables channel. Then first replace the head cable , if still fail to print...

1. headboard damage can lead to the printhead fired 100%. 2. head cable is the first part we can replace and check . if no problem, then go check the headboard, replace new one, or send it to repair company to test. 3, if you do not want to pay more on heads, please send the heads to repair ...

The vertical banding is belong to the head electricity problem.

1. print red , come out yellow, means the printhead film open, need to repair or replace a new head. Print head film is on the surface of the printhead, when it open, the color will mess up.

please upload your nozzle test to check so that we can help.

Please upload the nozzle , or color block , we will see it.

. 1.exclude the head cable problem.You already did by exchange the cables , and it can work fine, means the head is ok, you can try to replace the Y/M cables to check firstly. 2.the headboard have other channel, you can try your Y/M cable on the other group channel of the headboard.

1.exclude the air leak problem in ink supply parts. do it by replacing the dampers on black color and adjust head voltage. Now the market always have OEM dampers , original one is rare. I am not sure how long your dampers used already, change new one to try . 2. if the above ways cannot improve...

1. horizontal banding is the ink supply problem. replace new dampers to check. 2. see if your printer can adjust head voltage. Through adjusting the voltage , see the result. anything unclear, please ask.

1.please provide the nozzel photo , we can check. 2.please check the head cable, you can insert the yellow and magenta cable to other channel of the headboard, see the result.

what is your printer model? the scan motor is the the new one you just replaced?