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Mutoh Rockhopper II motherboard transitor HELP!
Hi Everyone,
Can someone please help me with a mutoh rockhopper II that we just bought? Flushed out all the lines manually as all the inks were dry, accidentally had some ink spill down the cable in to the top of the print head, (didn’t realise) when we re filled the lines noticed that the cyan/black lines did not fill, in the nozzel check we r missing all the cyan and black… we noticed on the motherboard a tiny transitor is burnt and cracked… does anyone know how we can fix this? Any help with this machine would be greatly appreciated, we are running blind…
Thanks
Gimme a sign…
(chat.) -
10 Replies
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i dont know your machine but going to presume it using similar head… the transistor may be a small box on the board near the heads? it is on the mimaki, that is a fuse transistor type thing, they burn when heads are shorted. So you do have to find a new head I suspect and repair the board. Not good news I dont think but I am a Mimaki person and not a Mutoh person, so please seek advise.
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Hi, Thanks for that. the motherboard is above the inks in this machine… the burnt transistor is the only thing we could physically see that was wrong…so now I need to know where to get the same type of transistor??? or is there other types that can be used as long as it has the same points? We were thinking of pulling one from an old computer motherboard that looked the same? just the tiny code on the top of the black box is different.. Does anyone know much about these?
Thanks -
Hi
Mutohs do have a head fuse which is approx 3mm in size & black, should be what blows when a head shorts. If it is a transistor that has blown then the colour stripes identify it, so if you go to a electrical component supplier they should be able to match it. The Mutoh fuse that i have used before is soldered at each end with no pins, but i fitted it in my Roland so can’t tell you where its located on a MutohKev
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Hi,
Thanks Kev and Dave…
now it seems that the ink isn’t filling either… we have tried switching heads etc so it must not be the heads… still no ink to one head though…
Pump seems to be running, how can you tell if you need another ink pump? anyone got any ideas of anything we could try before I have to call out the very $$$ expensive techs???
Thanks -
if you disconnect the small plastic hose that goes from the capping station to the pump and fit a syringe to the pump end and can pull ink through then the problem will be the pump. These are easy to change (5 mins and a couple of screws), they are also fairly cheap.
The fuses are at the front of the board on the lower level i.e. there is a panel that site above that lifts off. I think there are seven fuses and they are more or less in a line if I remember correctly. These can be bought from a good electronics supplier.
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Hi again,
Thanks Dave, looks like the pumps are fine.
Ok so the tech said it is the head… so we swapped a few things around and found all heads still work fine, we then put the cables in one pair at a time and tested them, we get all the way to the 7th cable (to the light cyan) and then it comes up with Head Over Current, one of the transistors was busted and we put one in that (looked the same)
Does anyone have any ideas of why this could be??? we think maybe the current in the tiny transistor is wrong? but it is very hard to find another one the same…
thanks everyone -
Have you tested the fuses?
On the main board in the top left there are 2 tiny black fuses with 20 on them. Put a crocodile clip over each one so that the clip is touching both parts of the solder. If it prints then its the fuse.
Make sure you turn power off and unplug the power cable before doing so or you’ll more than likely blow the head.
Cheers Mark
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hi mark, when u say top left…. according to our motherboard that is under the hard drive looking at the machine from front on… is this where u mean?
because we cant find anything on the rest of the motherboard that is black, with a 20 on it anywhere???
also, if it were one of these fuses(2) which i gather is 1 per 2 heads, we shouldnt be able to print out of 2 of the heads? just a guess…
and…. its only 1 section of 1 head that has the problem, the other side of the head works fine… (4a is the problem) but, if i plug 4b into where 4a goes, it prints fine… we have definatly established that the problem is coming from the motherboard, and not the heads, ribbon cables (both the long and short) its also not the circuit board on top of the carriage, this we are certain of…
any ideas would be great!!!
thanks again! -
Hi there, the mainboard in your machine is in the housing to the right of the machine, under the hard drive and everything else. Then you will see a "Head Driver Board" that sits flat on top of the mainboard,….after this is taken out, (It sits in a few white sockets) then you have access to the head fuses, each chanel has a fuse on it. They are black. You can check these with a meter to see if they have blown.
But head overcurrent, if your lucky is the head cables. One of them I think you will find has a connection bent over and is shorting out. (one of the outside edges usually)
The only problem you may have is that this can sometimes finish the head off in the process. Whenever I change a head on an Agfa or a Mutoh, I change the head cables as a matter of course.
Hope this helps -
Hi Everyone,
Thanks for all your help…
Turned out to be those little fuse things, 4 had gone… So fixed that and now the printer runs…
In all of this testing and cleaning and draining we have run out of 2 colours… Does anyone know of a relatively cheap supplyer of ink for this machine that would ship to Australia??? Ink is very hard to get here…
I found one on ebay called Kingfisher ink from china??? has anyone used this type of ink in a printer like this? If so is it compatible with the other Eco Sol +? another one is solventinks on line…
Once that is sorted then let the fun begin with profiles etc… (oh Dear)
Thanks again…
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