VJ1617H Not printing anything

[abccopyco]

Hi, I attempted to deep clean my printer and now it no longer prints anything. I'm looking for advice on how to troubleshoot what the issue might be. Here are some details that may be important:

- I unscrewed and lifted the printhead, flipping it upside down to clean around the edges/sides of the head.
- I did NOT disconnect any ink lines
- After cleaning I turned it back on and during the initialization I believe the machine lost power/shut down. I wasn't standing by the machine just came back over and it was off. This makes me believe the issue is electrical.
- After turning the machine on a second time and running a nozzle check, it printed 2 solid magenta lines and nothing else. Repeating the nozzle check resulted in nothing printing and nothing has printed since.
- I have checked all fuses I can find and they seem fine
- I run cleanings or ink charge and see ink flowing into the waste

Any details on test points and voltages at the printhead I can check to see if the printhead it dead or if it's signals not getting to the printhead?

 

[Ssignature]

There is a thread about a 1614 not printing anything. Basically the main board is the same. Look up that thread and you can read about a blown head fuse and where it’s located.

 

[abccopyco]

Thanks! I read through that thread before posting (didn't want to hijack that thread with my questions, although close to the same topic). I checked the fuses already and all the fuses I could locate are functional. Any suggested next steps before I order a printhead? Hoping someone has info on the signal/power to the printhead or additional troubleshooting steps. I know my way around circuit boards but just don't have schematics to know what/where to test.

 

[jcskikus]

Thanks! I read through that thread before posting (didn't want to hijack that thread with my questions, although close to the same topic). I checked the fuses already and all the fuses I could locate are functional. Any suggested next steps before I order a printhead? Hoping someone has info on the signal/power to the printhead or additional troubleshooting steps. I know my way around circuit boards but just don't have schematics to know what/where to test.

Had you tried soaking the printhead in a lint-free cloth that was doused in cleaning solution for a few hours? It may soften up anything that may have dried around or in the nozzles that appear clogged.

 

[abccopyco]

I attempted that a few times. The towel gets soaked with ink when soaking the head and I have seen ink droplets form on the nozzles when the machine is running the cleaning, but I never see any ink spray into the waste mat and nothing is printed on the media during prints or nozzle check.

 

[abccopyco]

So... replaced the printhead. Wasn't that. Now trying to find a CR board (DE-38013A). Anyone have any leads, google isn't turning up anywhere that has one.

 

[netsol]

get a service manual & a cheap digital meter and apack of clip leads from harbor freight.
check voltages, at the fuses not continuity across them. CAREFULLY!

since the machine shut down, i would GUESS you damaged or misaligned a ribbon cable & blew 42(?)VDC source that drives the power transistors feeding tge printhead

 

[abccopyco]

Thank you netsol for helping. I agree with your assessment/suspicion about the ribbon cable shorting. Here are the tested voltages:
- 0V at the fuse on the CR board
- 42V, 5V, 3.3V at the fuses on the main board near the ribbon cables
- 0V on the fuse next to the heatsink/back side of board
I didn't test the cylindrical socket fuses, just the slow blow.

I tried checking V on the CR board fuse at different points after initialization. Should I expect V there at all times? I have electronic experience so I'm good with testing any other board locations if you have guidance to continue debugging.

 

[netsol]

Thank you netsol for helping. I agree with your assessment/suspicion about the ribbon cable shorting. Here are the tested voltages:
- 0V at the fuse on the CR board
- 42V, 5V, 3.3V at the fuses on the main board near the ribbon cables
- 0V on the fuse next to the heatsink/back side of board
I didn't test the cylindrical socket fuses, just the slow blow.

I tried checking V on the CR board fuse at different points after initialization. Should I expect V there at all times? I have electronic experience so I'm good with testing any other board locations if you have guidance to continue debugging.

Slow blo wiuld be heaters.
we biught and refurbished a vj1617h 2 years ago. (Love the printer!) butbi would be lying if i claimed to bec
am expert on these. Mutohs are different, i would rather answer roland questions.