Need Help XC-540 Keeps blowing F3 Fuse

[corey_deuser]

So I recently changed my light magenta head, Once I did that, I lost all printing function in the C group (Light Magenta & Light Cyan). I checked the fuse and it was blown so I replaced the fuse to only have it blow again. I've spent most the day troubleshooting and here are the steps and wanted to get a second opinion on what I came to.

1) I took an ohm meter and checked the grounding to make sure it wasn't a grounding issue it was not.

2) I unplugged the ribbon cables from the heads that I was having problems with and still blue the fuse/

3) I unplugged the ribbon cable that went from the carriage board to the headboard on both boards. Once I did that I did not blow a fuse, so I proceeded to plug the ribbon cable back into the headboard and still did not blow the fuse. Once I plugged the ribbon cable into the carriage board the fuse blew.

My conclusion is to replace the carriage board.

 

[Broome Signs]

hi

you have got ink or cleanig flued on the cabel and in the print head

get a new ribon cabel and dry out the print head befor conecting the cabel

 

[crny1]

Same thing happened to me......one of the gold tabs on the ribbon cable was folded when I put it back in. Low and behold I had to get a new mainboard. For some reason the fuse did not protect it like I expected it should.