Hi I'm a newbie here, looking for some circuit help
I have a redsail 1360c plotter cutter or sticker cutter that is playing up- it can cut intricate patterns in paper or vinyl and takes paper 1360mm wide and is run by computer software.
when I turn it on with the switch the lcd screen flashes on, the plotter knife goes down and then it stops (screen off, knife up) and it does it again every second flash/ up/ down. it's supposed to travel to the right and be ready to cut with the lcd on. I bought it like this and the seller said it worked once from new and then did this , although it looks like it's done more work than one!
I looked inside and the power supply circuit has 240v going in, the fuse is good and it has 3 connectors coming out - one ground - one 28v and lastly -8v but the -8v reads about -0.5 and the 28v has about 3v coming out.
The board looks clean and nothing looks or smells burnt out or defective
I've had some help on another forum that has stopped but this is where we got to..
The 240v input goes up to a mosfet svf4n60f (far right) this looks to feed the transformer in the middle with around 300vdc to the sides and ocillating between 150 and 400vdc to the middle. Nothing seems to come out of the transformer, but it does have contenuity a quick test of the diodes inc the big one and the mbrf 10200ct (middle bottom) seems OK
I think the octocoupler is OK but unsure
I think it should be a simple fix but I'm out of my depth!
cheers trev
I have a redsail 1360c plotter cutter or sticker cutter that is playing up- it can cut intricate patterns in paper or vinyl and takes paper 1360mm wide and is run by computer software.
when I turn it on with the switch the lcd screen flashes on, the plotter knife goes down and then it stops (screen off, knife up) and it does it again every second flash/ up/ down. it's supposed to travel to the right and be ready to cut with the lcd on. I bought it like this and the seller said it worked once from new and then did this , although it looks like it's done more work than one!
I looked inside and the power supply circuit has 240v going in, the fuse is good and it has 3 connectors coming out - one ground - one 28v and lastly -8v but the -8v reads about -0.5 and the 28v has about 3v coming out.
The board looks clean and nothing looks or smells burnt out or defective
I've had some help on another forum that has stopped but this is where we got to..
The 240v input goes up to a mosfet svf4n60f (far right) this looks to feed the transformer in the middle with around 300vdc to the sides and ocillating between 150 and 400vdc to the middle. Nothing seems to come out of the transformer, but it does have contenuity a quick test of the diodes inc the big one and the mbrf 10200ct (middle bottom) seems OK
I think the octocoupler is OK but unsure
I think it should be a simple fix but I'm out of my depth!
cheers trev
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