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TOPIC: Re:Colorpainter H-74s Users

Re:Colorpainter H-74s Users 6 years 5 months ago #2094

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My H74s is also having problems. Not just the magenta but also cyan, black and yellow. :S
Prints perfectly for 2 meters then falls in a heap, run a clean, prints perfectly for another meter then falls over again. Have replaced the main controller board, it did make improvement.
Technicians tell me I need to replace 7 print heads, I don't believe them, if the print heads were bad then it wouldn't print perfectly at all. This is my 2nd Seiko and WILL be my last.
Is there anyone else having similar problems with their Seiko?

Re:Colorpainter H-74s Users 6 years 5 months ago #2095

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Hi Addcolour,
7 replace print heads is absurd. Are expensive. You could post the pictures failures ... and testing of noozles so we can see?
How long has your plotter? is the warranty?
Where are you from ?
(google translator - Brazil)

Re:Colorpainter H-74s Users 6 years 5 months ago #2096

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Hi Moa
The h74 is almost 3 years old and is now out of warranty. The nozzle tests vary greatly. If I run 2 nozzle tests, one straight after the other, one can be perfect and the other shows at least 50% nozzle failure. The main problem is that it is NOT always the same colours that fail, this morning it may be Cyan and Magenta, this afternoon yellow, black and light magenta and tomorrow could be Lt grey, Cyan, lt magenta and grey, who knows, out technicians certainly don't know. They are now telling me that they are going to get a technician from Japan. Angry and frustrated.

Re:Colorpainter H-74s Users 6 years 5 months ago #2097

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I think we can email the staff of our factory and report problems, as the representatives of the machines are not educated enough. Your problem is very similar to mine. I'm suspicious that it is the sub cartridges, I asked one to test seven months ago, believe! has not yet come ...

Re:Colorpainter H-74s Users 6 years 5 months ago #2098

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Firstly you must check the caps, make sure they are clean and of good quality.

Then check wiper blades and replace, also check wiping tray, has this been changed also.

(addcolour)
Check that the wiper blades are rotating, all 8 must be turning, open and close front panel to test. If dark colours are all failing, this would be cog on wiping unit broken.

It would be unlikely sub tanks, more likely needs service, if all heads fire and then don't

Re:Colorpainter H-74s Users 6 years 4 months ago #2099

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Hi everyone.

It is costing me too much money to get my point across. It is not the wiper blades; they are all new, it is not the capping station; most of them are new, it is not, in my opion the heads, but as I said it is costing way too much in wasted ink and media and I have given up arguing.
I am going to have ALL the heads replaced.

Re:Colorpainter H-74s Users 6 years 4 months ago #2100

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All times replacing the heads (2) Magenta k2, k7, they worked well for 2 months or are about 700 m2 each one after that began to fail again, are failing today. I gave up trying to help the retailer, as they will say that I have to replace the head again.

I have verified that the head subcartridges that this failing is not loaded with ink. Only loads when retreat, shake and return it. So I'm trying to replace it. I am waiting for subcartridges now come in February (nonsense).:S

Ps. my caps and wiper blades are "new."

(Freedom)
- How many months of use has its ColorPainter-H?
- Had a problem with it?

Re:Colorpainter H-74s Users 6 years 1 month ago #2194

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Hello all ColorPainter H74 Users.
:angry: :angry:
After all the head problems I have had, our service agents continue to tell me it is a head problem.
I have replaced 4 heads over the past 3 months and THEY HAVE ALL FAILED AGAIN.
One day someones is going to listen to me and FIND the cause of the head failures.
Quick fix by replacing the heads is NOT the answer. They have to identify why my printer is so CRAP.

I purchased the Seiko H74s because it was supposed to be the best in the class. I really think I would have been better purchasing a packet of marker pens and hand drawing the banners. :angry: :angry:

SEIKO!!! Never again.

Re: Colorpainter H-74s Users 6 years 2 weeks ago #2199

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It is now 9 months since my Seiko Colorpainter H74 failed. :sick: :sick: :sick:
9 months of frustration and anger. I now know exactly what it is like to give birth. The pain is unbearable.
I cannot get a good print from my H74 that is any larger than 300mm in length. Magenta disappears, cyan begins to disappear, light cyan/ light magenta/ black and yellow all become very scratchy.
Our local service agents cannot solve the problem and their headquarters in Sydney are reluctant to give him any assistance and certainly are not going out of their way to help me.
The H74 represented 33% of our total turnover and was growing at 2% per month. The past 9 months have cost us many tens of thousands od $ in lost revenue and wasted ink and media.
I intend to go out of my way to give the selling agent of Seiko machines in Australia the worst publicity that I possibly can. My one goal is ensure that NO Seiko's are sold in this city.
Seiko's representatives in Australia are by far the worst company that I have had the displeasure of dealing with in my 33years in the print industry.

Re: Colorpainter H-74s Users 6 years 2 weeks ago #2200

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My friend Jeff, pass your e-mail, I will send you an "image" of the print. I'm sure they will appreciate and will be very helpful.
I want to help. although suffer the same problem.
(sorry google translator)

Re: Colorpainter H-74s Users 5 years 11 months ago #2219

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I am an Oce tech in Cape Town and have several CS 6407 machines.( same as H74-s)
All my machines had or are having this issue to some degree!!!!!
After a lot of time and loot, i have found a cause of this>>>>>>>

The heads are starving of ink, due to dirty filters on the ink supply( doesn't fill subtanks correctly) and filters on the subtank, causing bad flow to the heads.
Magenta is the worst culprit, followed by cyan and then black. yellow seems the least affected.

Also if you are having dripping problems, the o-rings on the coupling to printhead need replacing.
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Re: Colorpainter H-74s Users 5 years 11 months ago #2220

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Thanks for your help.
Where are these filters and how can we change them?
How to solve this problem?

Re: Colorpainter H-74s Users 5 years 11 months ago #2221

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(addcolour)
I have a paper that you will like to have, and I submit to you, but do not have your e-mail.
My is moa1mga ... gmail....com

Re: Colorpainter H-74s Users 5 years 11 months ago #2224

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Hi Wayne091,
would be this part - INKBOX NEEDLE FILTER ASSY(HV), - where I buy?
not find to buy...

Re: Colorpainter H-74s Users 5 years 11 months ago #2225

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Hi Goa
I can not find the parts required. The filters are part of the PUMP TUBE ASSY and INK TUBE ASSY.
I have cleaned them successfully.
The lower filter ( pump) is easy, just remove needle and open . inside is filter and o-ring. use solvent and some air to clean. Also make sure inside of needle and ports are clean.
The ink tube is more difficult......
Filter is much smaller and difficult to work with.This can slso be done another way>>>>>>>
Remove ink tube from printhead and remove sub cart. reverse flush the ink ink tube and blow with air. Its gonna make a mess!!! You cant attatch a pipe to the needle( holes on side) so lots of rags to soak ink and flush>>>>re-assemble and do "replace ph" in menu
email.... wayne@ craftsigns.co.za
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Re: Colorpainter H-74s Users 5 years 11 months ago #2226

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I'll do that this weekend.
Have risk damaging the o-ring?, (I'm careful), because does not have a backup ...

Re: Colorpainter H-74s Users 5 years 10 months ago #2228

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We have frequent printhead replacements as well.
First they claimed we don't clean and maintain the printer properly and after a while they said that the coating on the PH is extremely sensitive (even to proper cleaning with clean wipers) and after a while it starts to "leak" and create drops which request more cleaning what actually just makes situation worse and on the end you have to buy a new PH.
The suggestion is to try to make the environment as clean as possible to avoid dust and particles where the machine is located and that could probably make the situation better.
I am considering switching to Mimaki JV5 or HP Latex or Roland.

Re: Colorpainter H-74s Users 5 years 10 months ago #2229

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I did this, only on the filter cartridge that leaves 1.5 liters, but has another filter, in a place that is difficult to reach, leaving the sub-card, which i`ve not cleaned. Don`t have the tools to do it (compressed air)

Unfortunately today, while printing, gave "system error 1310", cleaned the flat cables, and did not solve ... I can not leave this message at startup.
my machine is dead ... :-(
Any suggestions?
(sorry, google translator)

Re: Colorpainter H-74s Users 5 years 10 months ago #2230

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ok error 1310....
can be main board, carriage board or the carriage cables.
reload firmware first.!!!
check carriage cables on both boards.
Or start machine in maintanance mode( hold menu and cancel buttons while switching on until machine has booted) enter code when prompted ( menu .. up...down...> )
on menu tree, go to printer and scroll till you find the boards. OK on each of the boards, it is probably a firmware issue
.if firmware replaced and still errror, check carriage cable carefully, especially neear the carriage and where the cable is clamped. make sure the cables have not pulled tight and the V-bends before the board are good>>> should look like a square root sign. look for chafing damage.

Re: Colorpainter H-74s Users 5 years 10 months ago #2231

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Following instruction manual, i have done all of this, no solve. I think doing firmware downgrade (in machine is 2.11 but have anothers versions before) as boot and system, after clearing the log... i cannot go through at one of the maintenance mode, (the one that bypass the errors).
One more thing, the robot cable have already been damaged, and i fixed sometimes, nowadays its ok ( i guess), because, weld and hot melt glue in connector, i'm going to check it today,.
I have the technical bulletin, but it is the only one with password, i dont have the password and dont know what it does.

Before the 1310 error, it had others errors ( 3501 e others i dont have). At one of them the carriage moves crazy. After that didnt show any other message than 1310. I had to put the carriage manually in the right place.

really really thanks for all..

Re: Colorpainter H-74s Users 5 years 10 months ago #2232

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Hi Wayne,

Thanks so much for sharing your expertise.

I have a ColorPainter H-104S for two years now that we use mostly to print wide signboards , but also for smaller poster printing , various art reproductions and vinyl sticker prints for wall decorations . I have avoided replacing printhead but was reaching a point where my quality was going down due mostly to:
- prinhead shooting slants on many nozzles, with magenta the worst
- erratic behavior as you described i.e. suddenly one color looking like half cloaked, than reprint pattern and not cloaked
- a few nozzle really cloaked, less than 2 per printhead

ALL SETTLED NOW and I get even better quality than day 1, so my turn to share experience. I hope to put some pictures and videos on our blog later but wanted to providefeedback ASAP since this can be a life saver as it was for us.

1) irregular ink starvation
as you explained the erratic behaviour was due to irregular ink supply.
There is not really filters but valves in the ink cartridge [not an issue since you change them regularly] and subcartridge, that were 95% of the problem is. The remaining 5% are the pipe, the pump etc imho not worth looking at them at first pass.
After totally dismantling one circuit to understand, I would recommend to just try this simple method on each subcartridge and give a try since it take less than 5mns.
- remove the subcartridge
- fill the in/out with capping liquid using a seringue
- use a small plastic tip and push the valve in/out multiple time up to the valve move relatively smoothly [clean your plastic tip or use one per colour to avoid contaminating color
- clean the extra capping liquid
- put back your subcartridge and use cap filling or recovery
and give a try

2) nozzles shooting slant
You will have to buy a small ultra-sonic cleaner. I buy an industrial one here in singapore, with 100W, 1L, and hearer. Cost < US$200
- Remove your printhead
- fill your ultra-sonic cleaner with capping liquid [this is the less aggressive and should be enough]
- manually keep just the bottom of your printhead inside the liquid and run the cleaner for only 1mn, 2 times, no heating
- your printhead should look damn clean
=> replace and try, you should not have anymore slant

3) nozzles cloaked
Ask your distributor for the upgrade to H2-104S. Should be free of charge.
This upgrade is really fantastic[/i] and worth the trouble:
- you get nozzle mapping that allow you to map up to 10 nozzles per colour and thus get perfect quality even with cloaked nozzles
- you get a software called CP Manager that allow you to see and do all maintenance operations from your PC and more
- and you get a lot of new and better print mode, including:
* an ultra fast 360x360
* a reasonable 360x540
* a new concept for quality improvement that work by reducing the printhead speed in the X axis, and this really allow very high quality prints that were not possible in a reproducible manner before

In my case this meant I also had to upgrade to Onyx 10.0.2 and review all the media settings since they are not 100% compatible, but really worth the upgrade.
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Re: Colorpainter H-74s Users 5 years 10 months ago #2234

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Hi,
The error 1310, was broken cable, ( white) in robot cable, "thank God" :laugh: , .
The machine go back to normal....
The headprinter stayed 3 hours out the cap, and after 2 strong washes, it got better, even magenta...in test nozzles.

Re: Colorpainter H-74s Users 5 years 10 months ago #2235

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I now understand why I have grey hair.
My H74 was taken to Sydney 3 weeks ago to be fixed. Seiko Infotech has flown a technician from Japan to find and fix the problem.
3 weeks ago !!! and what have I been told about the progress - nothing, nought, zip, F/all.
3 weeks ago they gave me a H2-104 on loan until mine is fixed. 3 weeks ago the H2-104 had a stuffed magenta head, 2 weeks ago they were going to replace it, today that print head is still in transit. Where the F is it coming from, MARS.
I have also been told that the Media I am using, which by the way, happens to be sold by the same company that sold me the H74 and recommends it for use in the H74, is NOT SUITABLE.

I have been told, unofficially, that all they are doing with my H74 is replacing the printheads. WOW what a surprise. In 3 months I will be going through this all again.

Come on guys, how showing a little assistance to the people that support you.

I don't think I have to name the comapny that is Australia's only Seiko distributor because there is only one. But I am going to make sure that any potential Seiko buyer is made fully aware of the dodgy Used Car Salesman tactics of that company and the lack of propper support they can expect when they purchase capital equipment from them.

If there was a competition to find the worlds most useless solvent printer, Seiko would have to come close to winning.

Re: Colorpainter H-74s Users 5 years 10 months ago #2236

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hi guys
the sonic clean is not a bad idea... will certainly help with clogged nozzles.
There are filters on both ink supply and ink tube. They are situated inside the plastic ink needles that enter the carts and sub-carts.
They are not shown in the parts list or service manual, as you are required to replace ink tube or ink pump tube for service.
I need some assistance.... i am looking for H2-74 firmware. my machines are Oce and this firmware is not available to me. i want to try it out.
I feel for pulling ones hair out..... I have a client with similar problems and i swopped his machine out with mine for a month.
His worked perfectly in my workshop and mine ( brand new ) started giving problems after a few days.
Swopped back out and his machine is going crazy once again..... dripping, heads dropping out!!!

Crazy....... i'm going nuts again!!

Re: Colorpainter H-74s Users 5 years 10 months ago #2237

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Just one comment, actually there are not filters but valves ;-)

Re: Colorpainter H-74s Users 5 years 10 months ago #2238

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Hi Blue Fox

It is equal to this valve? (pack ink)
(attached)
Attachments:

Re: Colorpainter H-74s Users 5 years 10 months ago #2239

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Hi, Wayne091
I have firmware only H-74S

Re: Colorpainter H-74s Users 5 years 10 months ago #2240

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Yes, these are the ones ;-)

Re: Colorpainter H-74s Users 5 years 10 months ago #2241

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Wayne,

Even if you get the firmware, that will not be enough. The new firmware use totally different printing mode, declare itself differently on USB etc.

So you would need new firmware + drivers for your RIP + potentially updated RIP.

And the new firmware also come with a software on PC really nice that allow control of all printers features i.e. maintenance, etc directly from the PC with embedded documentation really useful.

All the Seiko firmware and software is Seiko property so even if I get my hand on them would be legally difficult to provide to you...

Maybe I can ask my distributor here in Singapore that has been doing a reasonable job to fly to your place ;)

Printing, Laser Cutting, Signs & Signages, Acrylic Manufacturing & more... Plixo: a Unique Boutique Workshop in Singapore !

Re: Colorpainter H-74s Users 5 years 10 months ago #2242

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Does anybody have a clue what is a cause or a remedy for ink dripping from the printhead.
(Ink drops cause nozzles failures during printing)
The service says that only solution (remedy) is to buy a new printhead.
The cause is (too) sensitive coating on printhead which is even in properly cleaned printer damaged after about 6 months (depending on the print quantity).
Any thought or experiences ?
thanks

Re: Colorpainter H-74s Users 5 years 9 months ago #2248

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Hi addcolour,
Your printer has returned?

Re: Colorpainter H-74s Users 5 years 9 months ago #2249

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Hi Moa.

NO, still don't have my H74 back. Very frustrating. Apparently the agents have sent my print heads to SEIKO in Japan to find out what is wrong with them.
I have no idea when I will get it back.

Re: Colorpainter H-74s Users 5 years 9 months ago #2252

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Hello you all,

I found this forum after searching to information about dripping printheads in the Seiko Colorpainter 74S.
We have this problom now for over 18 months. Last year in May we replaced 4 printheads (Cyan, Magenta, Yellow and Black). After 3 months we needed to replace Magenta again bcause it was dripping again. In October we replaced Light Grey and Light Magenta because they where dripping also. By the end of December all the printheads where starting to drip again. At that moment a refused to believe that the printheads where the cuase of the dripping heads and I believe there is something wrong with the vacuum or the the ink supply to the printheads. I mentioned this to Oce, who sold us the printer and does the support. Up to this moment they didn't do anything to the printer, because the only thing they want to do, is replacing the printheads. Last spring I have invited 2 different company's to do a second opinion, and both of them refuse to beieve also that the printheads are the cause of the problem.

Because Oce doesn't want or can't help us, we have a big problem. I have read in this forum that the cause of this problem could be related to the secundaire ink container or the filters. Could anybody send me the maintenance manual, so I can try to fix this by myself?

Thanks in advance!

Re: Colorpainter H-74s Users 5 years 9 months ago #2253

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Hello you all,

I found this forum after searching to information about dripping printheads in the Seiko Colorpainter 74S.
We have this problom now for over 18 months. Last year in May we replaced 4 printheads (Cyan, Magenta, Yellow and Black). After 3 months we needed to replace Magenta again bcause it was dripping again. In October we replaced Light Grey and Light Magenta because they where dripping also. By the end of December all the printheads where starting to drip again. At that moment a refused to believe that the printheads where the cuase of the dripping heads and I believe there is something wrong with the vacuum or the the ink supply to the printheads. I mentioned this to Oce, who sold us the printer and does the support. Up to this moment they didn't do anything to the printer, because the only thing they want to do, is replacing the printheads. Last spring I have invited 2 different company's to do a second opinion, and both of them refuse to beieve also that the printheads are the cause of the problem.

Because Oce doesn't want or can't help us, we have a big problem. I have read in this forum that the cause of this problem could be related to the secundaire ink container or the filters. Could anybody send me the maintenance manual, so I can try to fix this by myself?

Thanks in advance!

Re: Colorpainter H-74s Users 5 years 9 months ago #2255

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Hi Setup
I have been struggling with this issue for a while....
I dont think Oce or Seiko can help with the problem, as i dont think they understand it!
I have tried all the recommended "fixes" and it is still a problem.
( replace pump ink tube assy... replace sub-carts.... replace all o-rings on ink tube.... flush system... replace printheads..... to fail after 2-3 months)
Oce have now asked for old printheads for analysis....

I can send you the maintainence manual, but its too big for e-mail. my e-mail (wayne@craftsigns.co.za) and set up a drop-box or access to a server for upload.

As a matter of interest, what profiles have you been using and did the problem start soon after using a particular profile?

Re: Colorpainter H-74s Users 5 years 9 months ago #2256

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Hello Wayne,

Thanks for your reaction. I have send you an email with the link to our FTP-server. Could you please upload the maintenance manual to our FTP-server?

We have our problem always. It doesn't matter which profiles we use. We use profiles from Oce or our own profiles, it's not profile related.

We also have replaced printheads, and after replacing the printheads, the phenomenom dissapears also for 2 or 3 months, and then it's back again.

I am afraid that we have a, as we say in the Netherlands, a Monday-morning machine which can't be fixed.

Re: Colorpainter H-74s Users 5 years 8 months ago #2257

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Hello,

We have beside our dripping problem also a problem with the data.
When we print large tiled files we have no problems, but when we print several small images (pdf/eps/tiff) and nest these images in our RIP (Onyx Production House 10.1) our Colorpainter H-74s will stop printing and gives an error (see attachment) "No data received, check host" Our Rip is not verry bussy at that moment. we replaced the USB cable en installed Onyx on 2 fresh new PC's. Problem stays. It happens while printing with al my profiles and all my quicksets.

Is there someone who has a clue or having the same problem?

Thanks for any reaction!
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Re: Colorpainter H-74s Users 5 years 8 months ago #2259

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If reinstalling firmware ....does that set the machine back to factory default? Would that require the print head to be re calibrated using the gauges?

Re: Colorpainter H-74s Users 5 years 8 months ago #2260

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How many of your printers have vacuum vents attached to the top of the printer?

Re: Colorpainter H-74s Users 5 years 8 months ago #2261

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We have vacuum vents attached on top of the printer for ventilation.

Today I have spoken to Sihl, the distributor of Seiko in The Netherlands. The guy told me something totally new for me. It is not allowed to get the nozzleplate in contact with capping fluid. Capping fluid will damage the teflon layer off the nozzleplate.

Is there anybody who is familiar with this?

Re: Colorpainter H-74s Users 5 years 8 months ago #2263

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Hi all

Can anyone tell me where to purchase the head alignment tool kit for the Seiko H2-74s.

Moa..... My H74s has been returned, still doesn't work. Going to fix it myself.

Re: Colorpainter H-74s Users 5 years 7 months ago #2269

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As already mentioned, we’ve had a visit from the Technical Sales and Support Manager of Seiko. During this visit he discovered that the non-wetting coating was damaged and this causes the dripping problems, what is a logical explanation.
The main causes of the damaged non-wetting coating looks like the printheads have touched the media several times, without causing a headcrash and this wasn’t visible during printing (there where some scratches in the head-carriage direction) and wrong instructions for maintenance given by the supplier of the printer (missing non-wetting coating). We have used the wrong tools and wrong procedures which were advised by the supplier of the printer.
To be honest, Seiko and Sihl (the distributor of Seiko in The Netherlands) did a very good job to solve all the problems and have given a great support to get the printer running as it should be.
As some kind of a warranty, Sihl will monitor the printer every few weeks to check the status of the printer and the printheads. Seiko doesn’t want to take any risks with our printer anymore because of all the problems we’ve had and would like to have a satisfied customer at all costs.
To my opionion, at this moment, Seiko would do everything to keep us happy with the printer. After the replacement of some printheads, capping units, lower wiper box, wiperfluid and updating to H2 firmware, the printer is running perfectly and fast again.
Seiko and Sihl are totally convinced that the problems are solved definitely and after all the communication I’ve had with them, I’am also convinced that the problems are solved.
So, it took some time, but if you can come to the right contacts, problems can be solved without having a hard time to get them solved.

Re: Colorpainter H-74s Users 5 years 7 months ago #2270

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Hi Setup.
The problems you have had with your Seiko sound very similar to my problems.
The distributor of Seiko in Australia have spent 18 months trying to fix my machine without success.
They have returned my H74 to me and is un-usable.
I do not know what I can do to get my machine producing again. The agents here have dumped it back on me and have basically said the machines problems are caused by me.
I cannot get Seiko to reply to any of my emails.
It seems that at least in Europe both Seiko and Sihl are trying to look after their customers. In Australia we don't have that committment from either Seiko or their distributors. The only option for me is to sell my Seiko H74 for scrap metal.
As long as the current distributors have the Seiko dealership in Australia, I will never again purchase one of their machines.

Re: Colorpainter H-74s Users 5 years 7 months ago #2271

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Hello addcolour,

I can not judge about the distributors at the otherside of the world. I can only say, that, after I've had contact with Seiko, everything worked out fine. Seiko was really willing to listen to us and to solve the problem, what they did in cooporation with Sihl. What I should do in your case, what is similar to mine, is trying to contact Seiko directly and keep on trying.
You also need to find out the importer of the Seiko printers in Australia, because that can be a different company as the reseller where you are dealing with. For example, Oce is a reseller of Seiko in The Netherlands and that's the company where we bought the printer. Oce is not the importer of Seiko in The Netherlands, Sihl is. Oce had the same attitude as your supplier, that's why I have contacted Seiko Europe directly, and it helped!

Good luck!!

Re: Colorpainter H-74s Users 5 years 5 months ago #2282

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:dry: everyone seems to have trouble with their printer h74s when it becomes more then a couple of years old! Same problem here since 3 months, dripping magenta, etc. Seems this is our last Seiko anyway. Setup, Addcolour we should file a claim against them :ohmy: It's definitive not the climate, Australia, Netherlands (also Netherlands). The only thing they want is to spend another 8 printheads and blame us for no proper cleaning. :evil:

Re: Colorpainter H-74s Users 5 years 5 months ago #2283

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Same problem here, dripping magenta, several other issues, printer is almost 2.5 years old and seems Seiko wants us to replace expensive printheads! To be continued....

Re: Colorpainter H-74s Users 3 years 3 months ago #2567

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Hello. Can you help me to solve same problems like in topic. Also can aome give manual for mainternance?

Re: Colorpainter H-74s Users 3 years 3 months ago #2568

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Hello. Does anyone can help us with service manual for Seiko H74. And also latest firmware if have. Please send to my email expoo@vipline.ee or upload anythere like dropbox.
Thanks

Re:Colorpainter H-74s Users 3 years 2 months ago #2616

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Did you try replacing the capping units or/and the ink pumps ?

Re:Colorpainter H-74s Users 3 years 2 months ago #2617

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Did you try to reduce the middle heater temperature ?
it may be applying a field of hi temperature, then drying the surface of the heads.
this is all if your problem is while printing not while cleaning.

Re:Colorpainter H-74s Users 3 years 1 month ago #2665

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I have tried many things… cannot find solution. All heads working bad, make cleaning and after all ok. 1 meter max and again bending, printhead test are poor and different nozzles crash always. Clean again and nozzles are perfect…start printing and same problems. What it can be? it cannot be printheads all need to change… We print mostly on that machine Yellow posters and print run of other printheads are low…Totally machine runs about 50000 m2. We have other machine which print run is much much more on different heads and no any problem. Service talks sorry need to change all heads. Caps i have changed…Nothing happens. All head cannot die in same time. What can be else? And where is possible to find service manual. Some people write is is filter and valves, where they located? Also i find in one head in tube air inside. How it is going inside i do not understand, also not find any ink dripping from tubes. About same problem was on Roland but it was solved when i have changed dumpers, but on that model dampers not sold like spare parts. Does anyone have solution to solve that problems or not?

Re:Colorpainter H-74s Users 3 years 3 weeks ago #2724

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Hello. Every one any body have Main board for Seiko H104S, 2xCMYK???

Re:Colorpainter H-74s Users 3 years 3 weeks ago #2725

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Regarding problem with bending after 1 meter. You can try clean a dampers inside print head. You need take print head out of machine. Open metal cover and you will see metal bag attached to a head surface. Very gentle undo two top screw which are holding the damper. After please hold top hole by finger in a damper to make sure no any ink spill will be on electronic parts. After that use syringe and a lot of solvent and try push solvent inside and sock it out until the clear solvent will appear. I'm not guaranty it will help, but you can try. Some time ink can be stuck in a damper, so it will not let ink to go thru print head normally.
Another thing you can try to clean this print head, use ultrasonic bath, but it can damage print head completely so I'm not recommend to do that, unless you are ready to loose print head and you have spare one to replace, if some thing will happen with old one.
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