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If lubricating does not help then replace scan motor. Usually life time of scan motor 5000 hours.

Check this one: https://www.ebay.com.au/itm/Roland-SP300i-SP540i-service-manual/193616916283?hash=item2d1477af3b:g:5UYAAOSwwmBdy9bN

MikaChip incorporates a user-friendly software and device that allows you to reset Mimaki ink chips unlimited times. You can reset ink level and expiry date on original Mimaki ink chips in one click, still using your original chips so you won't lose warranty. Currently we are supporting Mimaki...

Looks like your magenta nozzles missing. I would check ink first. It could be simply bad magenta ink. Then check your ink lines if there are any air bubbles? It could be head damper need to be replaced. What is the printer model?

Maybe head strike?

Just for Information: If CR encoder error appears on bootup sequence it mean main board does not receive correct information form CR encoder sensor during self check. If you pay attention then you will notice in first 4-5 sec of initialization process main board send PWM signal to PF motor then...

What wrong with boards? What is the errors or symptoms?

I am using ink chip programmer definitely worth it! Try this one:

I assume heaters is off?

Ideal is 20-25 degree Celsius and 60-80% humidity. Just for your information, with lower temperature ink viscosity increase as a result drop formation start to change. Usually below 15degrees ink become too think and you would not able to get print results. When it too hot then ink become more...

Actually yes there are some software which works only with specific F/W version. (below 2.0)

No Problem, thumb UP )

Yes you can do it manually. you have to unlock carriage from home position. Simply push head to the right side and slowly release it. There are small locker mechanism on the right hand side which should unlock head. Then just move carriage across toward the maintenance station.

Usually during startup you should see printer model and f/w Ver. something like 1.07

Hi I have head with some missing nozzles. I replaced it few months ago and kept it like spear. IF you interested send me a PM.

Are you printing in uni or bidir? Try to switch in unidirectional if result much better in unidir then recalibrate your bidir or check the carriage height could be too high.

What is the printer F/W version?

Any messages appears on the control panel? It could be sensor not triggering. Try to remove media and put lever down and repeat procedure.

Try to print in unidirectional mode.

usually it happen when air introduced in the ink lines. If you move carriage toward maintance unit and look under for few minutes can you notice any droplets on the Cyan and Yellow? If yes more likely there are air going in to the head. I would check ruber o-rings, adapter, damper it self.