hello everyone,
im trying to diagnose a problem i have never encountered before.
we have a riso rp3700 at our small collective printshop. it runs pretty well. during one of our last jobs, someone thought it would be a cool idea to record the sound from the riso running. he placed a contact microphone against the machine, which is basically a magnet. i did not think anything of it...
however after that, the scanner started to dysfunction. it picked up some of the image on the flatbed, like the top half, and would "drag" pixels on the bottom. i thought the damage from the magnet would be temporary. however after a month, now the scanner creates a randomly placed patch of color – completly unusable.
i thought maybe it was the TPH, but creating a master from the test mode works just fine. the fault seems to reside in the scanning. the drive part seems alright, the lamp moves fine.
i do not know much about scanners. i understand the riso uses a ccd sensor, but im finding contradictory information on its magnetic sensibility, some saying its affected, some not. from what i can understand, the fault would lie in the lens assembly. from what i gathered, magnets dont damage pcbs.
i have a whole scanner unit i can replace the faulty one with. but i would like to understand the root of the problem, and eventually change out the fewest components i can. also, dont want to risk frying my other scanner by connecting it without understanding the source of the problem.
does anyone have any experience or insight on this problem and largely scanner and magnets ? i feel like a million things could have gone bad and kind of dont know where to start...
thanks !
im trying to diagnose a problem i have never encountered before.
we have a riso rp3700 at our small collective printshop. it runs pretty well. during one of our last jobs, someone thought it would be a cool idea to record the sound from the riso running. he placed a contact microphone against the machine, which is basically a magnet. i did not think anything of it...
however after that, the scanner started to dysfunction. it picked up some of the image on the flatbed, like the top half, and would "drag" pixels on the bottom. i thought the damage from the magnet would be temporary. however after a month, now the scanner creates a randomly placed patch of color – completly unusable.
i thought maybe it was the TPH, but creating a master from the test mode works just fine. the fault seems to reside in the scanning. the drive part seems alright, the lamp moves fine.
i do not know much about scanners. i understand the riso uses a ccd sensor, but im finding contradictory information on its magnetic sensibility, some saying its affected, some not. from what i can understand, the fault would lie in the lens assembly. from what i gathered, magnets dont damage pcbs.
i have a whole scanner unit i can replace the faulty one with. but i would like to understand the root of the problem, and eventually change out the fewest components i can. also, dont want to risk frying my other scanner by connecting it without understanding the source of the problem.
does anyone have any experience or insight on this problem and largely scanner and magnets ? i feel like a million things could have gone bad and kind of dont know where to start...
thanks !
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