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ok, after some measurements and a bit of reasoning, I desoldered the IC11 chip, and voilà the short circuit disappeared, the absorption dropped a lot (and obviously the same error still remains :D) I don't want to be wrong but that integrated circuit is programmable, so now the hopes of being...

thanks to all for the answers.this regulator take in input 5v and should give 3v output (called VCC3 into service manual) (that doesn't give power cause the short). indeed I didn't tell you all the tests I had done. once I found the short on the output of the voltage regulator, I obviously...

Hello , i hope someone can help me into repairing this sp-540v servo board. i have a short to the ground on the output of IC13 ( voltage regulator) but i cannot understand what this 3v goes in to power.. Can someone with more experience in this stuff give me an hint? will happily pay for any...

thanks for hint.. that has been my first suspicion, when i checked the board the first time, it had indeed an A1746 and C4131 not working and transistors WM and WL too.. but now all the power transistor seems to be good. this is the reason i would check with a service manual if i could find it

Hi to all. I have a mutoh rj900 that does print good BLACK channels, but only one channel for the others.. It is a board problem, since i replaced main board with a working one i use for tests and all is printing ok. Now.. someone can help me with a service manual and/or suggestions what...

i am a 40 year old technician from italy. usually work with epson plotter but in the last times i had to repair some mimaki and mutoh too. i hope to be a good user of this great forum

A bad workman always complains of his tools.

A bad workman always complains of his tools