Multimeter help!!!

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Multimeter help!!!

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chupa31

Newbie

6. August 2008 @ 19:58

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I tried to follow the tutorial to adjust the pot on your gamecube laser, however I am stuck in the multimeter section. So my problem is how to read the multimeter. It says that 170-210 ohms is good for your pot. So what I want to know is what is my reading? I have pointed to it using the image of the analogue model I have. Thanks.

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varnull

Suspended permanently

7. August 2008 @ 02:41

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500 ohms.. if that is the factory setting and you are reading the right pins then setting to 170 blindly will just shut down that laser. There are 2 ways to arrange the bias setting on a laser.. series and shunt.. if it is series then reducing the value increases the volts to the emitter diode, if it is parallel (shunt) the opposite applies.. in any case, you don't want to adjust more than 10% from the factory setting in either direction... unless it is already completely fried and then you have nothing to lose anyway....

The number of perfectly good ps2 lasers I have seen ruined by the pot tweakers is incredible... especially when the real problem was low quality disks ;)

Seriously.. anybody who doesn't know how to use a multimeter shouldn't be messing with lasers. You set the bias of a laser using an oscilloscope on the test point and set the eyeheight of the envelope to around 1v p-p (or as big as you can get it without clipping)

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This message has been edited since posting. Last time this message was edited on 7. August 2008 @ 02:45

chupa31

Newbie

7. August 2008 @ 08:44

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Originally posted by varnull:
500 ohms.. if that is the factory setting and you are reading the right pins then setting to 170 blindly will just shut down that laser. There are 2 ways to arrange the bias setting on a laser.. series and shunt.. if it is series then reducing the value increases the volts to the emitter diode, if it is parallel (shunt) the opposite applies.. in any case, you don't want to adjust more than 10% from the factory setting in either direction... unless it is already completely fried and then you have nothing to lose anyway....

The number of perfectly good ps2 lasers I have seen ruined by the pot tweakers is incredible... especially when the real problem was low quality disks ;)

Seriously.. anybody who doesn't know how to use a multimeter shouldn't be messing with lasers. You set the bias of a laser using an oscilloscope on the test point and set the eyeheight of the envelope to around 1v p-p (or as big as you can get it without clipping)

Are you sure you know what your talking about when it comes to the gamecube? Everything you say sounds very technical (Ill admit over my head, although I think you intended it that way), but it does not seem to pertain to the gamecube. Have you seen the tutorial for changing the pot on modthatcube? http://modthatcube.wiinewz.com/main.htm
It does not mention any of what your talking about? It is not that I did not know how to use the multimeter, I just did not know .5 meant 500 ohms (silly me, how could I be so stupid).

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afterdawn.com > forums > archived forums > nintendo gamecube - general discussion > multimeter help!!!


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