Blizzard 1230 IV "Do Not Cut"

esel · 16 July 2015, 00:47

hi,

does somebody knows why the blizzrard hat a marking on the PCB named " do not cut" ( see pic ) ?

ptyerman · 16 July 2015, 02:56

Probably because it would stop working if you did!

Daedalus · 16 July 2015, 18:09

I can't be sure, but rough count of pins would tell me that that trace provides power to the SCSI expansion port. Cutting it would probably stop it from working, though I really wonder why it's marked like that. There are other power lines on the trapdoor slot too, but maybe that one's dedicated for the SCSI adaptor. To be fair, cutting any of those traces will cause you problems so perhaps there were earlier versions where that line wasn't connected and it was left there for future modification, or to be replaced with a resistor to protect the boards from a short but was later left off.

16 July 2015, 00:47	#1
esel Registered User Join Date: Jul 2012 Location: Kassel Posts: 160	Blizzard 1230 IV "Do Not Cut" hi, does somebody knows why the blizzrard hat a marking on the PCB named " do not cut" ( see pic ) ? Attached Thumbnails

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16 July 2015, 02:56	#2
ptyerman Registered User Join Date: Jun 2012 Location: Worksop/UK Age: 59 Posts: 1,328	Probably because it would stop working if you did!

16 July 2015, 18:09	#3
Daedalus Registered User Join Date: Jun 2009 Location: Dublin, then Glasgow Posts: 6,334	I can't be sure, but rough count of pins would tell me that that trace provides power to the SCSI expansion port. Cutting it would probably stop it from working, though I really wonder why it's marked like that. There are other power lines on the trapdoor slot too, but maybe that one's dedicated for the SCSI adaptor. To be fair, cutting any of those traces will cause you problems so perhaps there were earlier versions where that line wasn't connected and it was left there for future modification, or to be replaced with a resistor to protect the boards from a short but was later left off.

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