Racegrafix
New Member
Old printhead gave this error. Replaced head, tried many cleanings, couldnt get two channels to work on new printhead. Replaced cables. Error 85. replaced cables again error 85.
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Mutoh 628 error ID-85
- Thread starter Racegrafix
- Start date
Hi! Check all mainboard fuses first. If all ok, check resistance in pin1 from every flat cable from the mainboard to the cr board (where u connect printhead cables) just to check they are correctly aligned. If all ok, check from the cr board to the printhead pins (ser photo) with the cable connected to see if they are aligned too. If all ok, im sorry but surely printheads were damaged, usually for reusing the same cable after a printhead replace or connected in reverse (have seen both sometimes).
Do everything always with printer off (without current at all)
Do everything always with printer off (without current at all)
Racegrafix
New Member
Thank you so much for some direction, I will work on that now. I really cant make out what I am looking at in the picture.
Racegrafix
New Member
Found one fuse good on main board, one that wouldnt fully ohm out, and one that looks to be bad, So really two bad ones.
Thats very good. With a little luck no transistors death. Replace the fuses with the same ones, and be sure cables are perfectly aligned with the pins this time. Be sure with the position in the printhead too... They are not swappable. Be extremely carefull with those cables... Are the worst I ever seen on this kind of machines and is very easy to not align them correcly in the pins.
Solventinkjet
DIY Printer Fixing Guide
The cables are horrible. The official rating is that they can be installed 3 times before failing.
Racegrafix
New Member
Ive replaced fuses, and that cleared error. Still no ink flowing at printhead though. The only thing I havent replaced I think are the boards, the case, and the stand.
the cables are new
the cables are new
Charge the printhead manually with ink (suck slowly with a siringe from both tubes with an Y connector until you have some ml in the syringe) and try to print without doing a cleaning after that. If it prints absolutely nothing... The normal cause is those 8 big transistors in the black cooler are fried... Its very typical. Try to replace all 8 (its not easy but you dont loose but some dollars and some time). Be carefull because there are 2 kind of transistors (a1746 and c4131 usually on rolands and mutohs) If it doesnt work, i suggest changing both, motherboard and printhead at the same time. I had that problem in a 1204 and the old printhead keeped to blow the fuses (and thanks it was only the fuses) until I replaced it. If you want to test the printhead you can buy a cheap Epson 4880 or r2400 (and swapping the printhead cap top with a ecosolvent one)... I tell you because dx5 now are expensive. I only did that once with a 4880 and printhead lasted like 9 months (but it was a really old 4880 we bought on earlys 2000)
At least you learn one thing... Always you mess with that cables, replace them. Every time you replace printhead, replace those devil cables
At least you learn one thing... Always you mess with that cables, replace them. Every time you replace printhead, replace those devil cables
Racegrafix
New Member
Ive already replaced dampers, cap top, pump, printhead, cartridges, fuses, cables, and primed the dampers, tried pulling ink manually, etc.
Ive tried many cleanings, and it just wont pull ink. Its not blowing fuses now, I think the old printhead caused that.
Which transistors would cause that issue? picture by any chance? I will replace them for the hell of it.
Last edited:
You dont get ink in syringe sucking from the pump??
The 8 transistors in the top right black block
The 8 transistors in the top right black block
Racegrafix
New Member
I have in the past, but I just tried it and nothing but air. Seal looks perfectly lined up. Looks like good pressure against cap. tried wetting cap. Nothing but air.
Racegrafix
New Member
When I pull ink manually, its just air.
printer only has cleaning fluid in it, its never had actual ink since ive been fighting this issue. So printhead has never seen actual ink.
printhead is new, cap is new (oem).
I pulled printhead back out to make sure it was hitting correct spot, and yes, it was centered perfectly.
printer only has cleaning fluid in it, its never had actual ink since ive been fighting this issue. So printhead has never seen actual ink.
printhead is new, cap is new (oem).
I pulled printhead back out to make sure it was hitting correct spot, and yes, it was centered perfectly.
Racegrafix
New Member
maybe more downward force? I think only lowering printhead would do that, but no idea if thats a thing or how to do it.
You are sucking from both pump tubes at the same time?
If not, do you see cleaning liquid spitting of the pump while doing a "little charge" or a "complete "charge"? (Or some long cleanings, but is better to do a " little charge")
No, dont lower the printhead yet. Just look if its between 1.2 and 2mm from the bed (not the cap), its above 2 mm, you can lower it a little by moving the white excentric nuts on the carriage.
Look first those 3 things and we will see what to do
If not, do you see cleaning liquid spitting of the pump while doing a "little charge" or a "complete "charge"? (Or some long cleanings, but is better to do a " little charge")
No, dont lower the printhead yet. Just look if its between 1.2 and 2mm from the bed (not the cap), its above 2 mm, you can lower it a little by moving the white excentric nuts on the carriage.
Look first those 3 things and we will see what to do
Racegrafix
New Member
I was having syringe issue, so I was pulling from one, with closed syringe on the other and the 3rd blocked. I can clearly hear and feel the air moving at the cap with printhead moved out of the way. I stuck a card over the cap to test seal, and pulled suction. It really didnt do much, and didnt stop the air flow. The seal looks perfect. It did previously work, because it would move cleaner through it and print cleaning fluid onto material...but only two channels.
where would I see fluid spitting from the pump?
where would I see fluid spitting from the pump?
Racegrafix
New Member
I bought another cap top to try, non oem. I know everyone hates non oem, but I am not a fan of oem parts that dont work either. I bought the oem and it hasnt printed a single thing and Im pretty sure its bad. It absolutely wont seal to pull suction.
Solventinkjet
DIY Printer Fixing Guide
In my experience the DX5/DX7 aftermarket cap tops tend to be good quality as long as they look similar to the OEM ones. The ones that have plastic screens in them instead of metal tend to be the worst. But compared to other aftermarket cap tops most of them are legit.
Put ink with a syringe in cap borders just to test if its the cap or the complete station. I usually dissasemble all station because sometimes tubes get broken inside since are silicon instead of teflon. Anyway I usually replace full station (not original) instead of only the cap.