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Magenta/yellow blowing F2 fuses
hiya,
One more question related to the last one i posted related to my Versacamm SP300V.
after the weekend, I went to print adn Mag/Yel head was not printing at all. thanks to the forum I tested fuses first and found F2 fuse to be out. (this happend several years ago as well due to my own fault so was aware of the fuses already)
I ended up replacing with a removable fuse.. but once replace it blows as soon as I switch on from the panel. So I trouble shoot in following way:
1. All cables plugged in as in a fully operational status: starts up just fine, blows fuse immediately. no errors on Lcd panel.
2. (unplugged power cable first, then..) Removed all ribbon cables between mainboard and heads. (plugged back in power, then…) Starts up fine, displays "temperature too low" on lcd but does not blow fuse.
– following the route from mainboard to head started plugging cables back in.
3. cables from mainboard to printer carriage board. same as above, "temperature too low" but does not blow fuse
4. plugged in cable from printer carriage to mag/ylw head but no cable attached to black/cyan head – same "temp too low" mesage, no blown fuse.
5. plugged in cable from printer carriage to blk/cyan head but removed cables from printer carriage to mag/ylw head. no errors on LCD screen, startup procedure ok, but blows fuse.
Any ideas? I noted that a post on this forum topic61654.html suggests transistor blown on mainboard. another suggests he followed schematics from thermistor to a resistor on mainboard and replaced to fix. both of these were old posts but no more details. Any idea how to check the transistor mentioned above? I have a digi multimeter.
so any help would be appreciated. been down a couple days and being just a one man show cant really afford a new mainboard/printer carriage board printhead combination in order to diagnose and repair.
thanks anyone who can help
dan
edit: my subject title is misleading.. mag/yel head failure only a result of F2 fuse blown. seems the black/cyan or something else between mainboard and head is causing fuse to blow
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12 Replies
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Yes I’ve had this before on a old Versacamm
It was transistor and needed replacing. Actually quite easy if you can sold but make sure your replace the correct one with correct replacement. Check with multimeter in Ohms and you will see a pattern in the parallel set of transistors. They should have similar values that match on every other transistor so not all the same. I would definitely get an engineer in to sort. My problem was microscopic ink in socket that ribbon cable slots into that blew the fuse and transitor. Can take out the head also. But generally it all depends on bad luck.
I knew a good engineer as I’m sure many do. Pm if you need his number he’s based down South from memory but travels everywhere. Good luck
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OK cool. Awesome thanks for that.
was it one of these?
download/file.php?id=41822
i found this pic from a few years ago on here. I have a Electronic technician i can ask for help, he does my fine soldering. I shall ask his help tomorrow morning to test it.Are these parts available to purchase somwhere that you know of?
thanks again mate.. i’ll keep this updated.
danny
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That’s the ones Dan. Unplug everything. Punch a few keys to dissipate any static before removing. Take of main board gently heat bellow the board and pull up the transistor easy. You will have to sets like that and there will be a pattern so something like
See the pattern zig zag between the 2.4 this is an example obviously.Transistor batch 1 to 12
2.4 / 1.0 /2.4 / 1.0 /2.4 / 1.0
1.0 /2.4 / 1.0 /2.4 / 1.0 / 2.4
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If you find the faulty one you can get it sourced from most electrical suppliers must match. There’s also digital print supplies. Not B&Q 😉
Also a company that will repair and test boards I know of also fixed another printer of mine years ago. Company is called Lumico mention my name. Top bloke sorted me out massively. Take board out pack well send in post he returns fixed. Lovely jubbly.
No trying to figure out. I may add he is a highly skilled bloke that fixes anything for a living not printers. He will fix anything literally TV, relationships lolDo a Google search you’ll find him
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Based in Lincoln here’s the number for all 07932 977615 his name
Is Richard.Always best to go to main dealer for obvious reasons.
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quote Michael Kalisperas:No trying to figure out. I may add he is a highly skilled bloke that fixes anything for a living not printers. He will fix anything literally TV, relationships lol
hahahah brilliant. You can always use a dude like that. lol
once again thanks loads mate. keep ya posted
d
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Welcome
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UPDATE:
yes.. had one faulty transistor. got it from digi print part sc4131. should be here tomorrow, need some thermal paste as they are mounted to a heat sink but looks like a piece of cake to replace.
had a faulty capacitor on there as well, which maplin stocked, one of the 50v 220u types.
hopefully it will all work again and no head damage. will know tomorrow.
thanks again
Dan
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Just make sure everything is in place seated properly and clean and dry before your reassemble. Also be aware that transistor may have sent dodgy signals back to the head and damaged the head but very unlikely. Worth remembering though.
Glad to be of some help. -
OK… just an update. I replaced the transistor that was faulty.. but it blows the new one almost immedietely once sub power is turned on and a test print is initiated.
any idea what could be blowing the transistors?
D
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Check cables I would ring an engineer if it’s blowing right away but could be as simple as a cable not in properly or warn.
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sounds like the head cables are not seated properly/bad connection. Where in the country are you?
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