Roland VP540 - when job begins, as soon as the head assembly begins to print, I hear a slight knock and the machine turns itself off.

Question edited for clarity, full 'maker model (what it is)'.
Question moved to the only Roland Printer category.

Try a Head Soak. Make sure the tube to the waste ink bottle is not blocked or pinched.

https://www.google.com/search?q=versacamm+vp540%2C+coverig+image+in+black+ink

..

Go to the manufacturers website for that answer

Just one Question?
Do you have your LAN Cable tied with your AC power Cable?
I have th same problem on two VP540 after seven years of trouble free working. A few months ago I was reorganizing my shop and I tied up both cables to avoid tangle cables with machine wheels every time I move It.
I think that the noise produced by AC Voltage Affect the VP540 ethernet port.

your print head dry out, cause is: no use! you should detach the tube between the pump and the caps, the one of magenta and yellow, insert a seringe in the tube (that comes from the cap) and suck some cc´s of ink, .then atatch the tube again and run one or two powerful cleanings, then run the test. A smart advise is: never turn off the machine in the main power, the machine when in stand by, does automatic a check and a cleaning process from time to time if needed.

Does the machine come to ready state? and if it does, does the code blow as soon as an original in placed in the df or the start button is pressed?
Make sure you have 2 ribbon cables and one connector running through back of machine from PH unit. Also make sure you have the correct ph unit installed.

Here this is straight from Konica ...
C4101 code at power up.
Description:
C4101 code at power up.
Solution:

PROBABLE CAUSES:
1. Failed PWB-A (Mechanical CB).
Replace the PWB-A board (p/n 4040 0101 03).

2. No 24V DC at PJ17A, pin 5.
Replace the 3.15A fuse located on the power supply.

3. Polygon motor in the Print Head Assembly fails to turn.
Begin by checking the connections to the Print Head Assembly. Unplug and reseat all connections. If issue continues, replace the Print Head Assembly (p/n 4040-0751-00).

C-4101 (C4101) at power up.
Description:
C-4101 at power up.
Solution:

CAUSE: Failed BCRS board.

SOLUTION: Replace the BCRS (p/n 4551 2033 01 for bizhub 350 and p/n 4551 2034 01 for bizhub 200/250).

G.L.

Hello there
You may not see a paper jam.

This may work for you, it has worked for many here I given this advice so gave it a try it could work for you. Generally when this happens, something has fallen into the printer, or a piece of paper has been jammed in there.

First step, remove the ink cartridge, and turn the printer upside down and gently shake it, see if anything comes out.

If nothing goes, or you can't hear anything rattling around, get a piece of cardstock paper (60lb or heavier) and gently push this through the printer, to see if it will help push out what might be stuck in there.
And gave the rode that the ink slides on a good clean and maybe a bit oil on cloth and wipe the rod with it.

Also clean The purge unit, called a spittoon assembly in an HP, Lexmark, Caonon and other inkjet printers, is where the print head assembly parks when not in use, also its other job is to clean and make sure the print head is clean and open for printing.

That is where you'll find the print head assembly parked on top of it.
It also has an electrical pump to milk the print heads and test for ink flow.

So clean all under where the heads are parked and on IP6600D models you can take out the heads just by clipping them out, and then clean well.


Please come back and just gave a vote, it will gave me some satisfaction to know am helping some one so I will keep on helping.
All The Best: Pineworks

Hello there
You may not see a paper jam.

This may work for you, it has worked for many here I given this advice so gave it a try it could work for you. Generally when this happens, something has fallen into the printer, or a piece of paper has been jammed in there.

First step, remove the ink cartridge, and turn the printer upside down and gently shake it, see if anything comes out.

If nothing goes, or you can't hear anything rattling around, get a piece of cardstock paper (60lb or heavier) and gently push this through the printer, to see if it will help push out what might be stuck in there.
And gave the rode that the ink slides on a good clean and maybe a bit oil on cloth and wipe the rod with it.

Also clean The purge unit, called a spittoon assembly in an HP, Lexmark, Caonon and other inkjet printers, is where the print head assembly parks when not in use, also its other job is to clean and make sure the print head is clean and open for printing.

That is where you'll find the print head assembly parked on top of it.
It also has an electrical pump to milk the print heads and test for ink flow.

So clean all under where the heads are parked and on IP6600D models you can take out the heads just by clipping them out, and then clean well.


Please come back and just gave a vote, it will gave me some satisfaction to know am helping some one so I will keep on helping.
All The Best: Pineworks

Hello there
This may work for you, it has worked for many here I given this advice so gave it a try it could work for you.
Generally when this happens, something has fallen into the printer, or a piece of paper has been jammed in there.

First step, remove the ink cartridge, and turn the printer upside down and gently shake it, see if anything comes out.

If nothing goes, or you can't hear anything rattling around, get a piece of cardstock paper (60lb or heavier) and gently push this through the printer, to see if it will help push out what might be stuck in there.
And gave the rode that the ink slides on a good clean and maybe a bit oil on cloth and wipe the rod with it.

Also clean The purge unit, called a spittoon assembly in an HP, Lexmark, Caonon and other inkjet printers, is where the print head assembly parks when not in use, also its other job is to clean and make sure the print head is clean and open for printing.

That is where you'll find the print head assembly parked on top of it.
It also has an electrical pump to milk the print heads and test for ink flow.

So clean all under where the heads are parked and on IP6600D models you can take out the heads just by clipping them out, and then clean well.


Please come back and just gave a vote, it will gave me some satisfaction to know am helping some one so I will keep on helping.
All The Best: Pineworks

Try turning the paper around. Some times the corners of the paper get slightly bent and the paper wont load.If turning the paper around does not work, switch your paper. Hope this helps.

I have always had best success using manufacters ink