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#1 LinksAwakening

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Posted 02 January 2003 - 10:44 PM

I recently had a problem with my Playstation. When I turn it on, everything works fine except for the controllers. I realize this is do to SMF #15 (Surface Mount Fuse 15) blowing. This fuse runs (ran) at .6 to .7 amps. I found a site that says I can replace this fuse with a resistor of the same value for better results, but I don't know what value resistor I would need.

Can anyone help me out here? Any help is greatly appreciated.

#2 feflicker

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Posted 02 January 2003 - 11:22 PM

You need to know the supply voltage, and the desired output voltage, to determine the resistors value in ohms...

#3 LinksAwakening

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Posted 03 January 2003 - 12:57 AM

I found th following equation on an electronics site: Ohms= Watts/Amps*Amps (amps squared). When I put in .25 for watts (for a 1/4 watt resistor) and .4225 for Amperage (average desired amperage (.65) squared), I get about .6 ohms of resistance is what I would need. But this doesn't make any sense to me, especially since the only way I know of to get .6 ohms of resistance is to parallel circuit 15*10 ohm resistors (the smallest I've seen). That to me seems very wrong and highly impracticle.

Has anyone ever successfully replaced Surface Mount Fuse #15 on the Playstation motherboard with a resistor? If so, what value did you use?

#4 MorfiusX

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Posted 03 January 2003 - 02:51 AM

if it's a fuse, just get another from radioshack. it doesn't have to match perfectly. just get one that's close to the orig.

#5 LinksAwakening

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Posted 03 January 2003 - 03:01 AM

QUOTE (MorfiusX @ Jan 3 2003, 01:51 AM)
if it's a fuse, just get another from radioshack. it doesn't have to match perfectly. just get one that's close to the orig.

Do you think that a .750 amp automotive (or other type) fuse would do the job of the .6 to .7 amp SMF for the Playstation? I really don't know much about fuses, but it seems close enough.

If worse comes to worse, I suppose I can just bridge the connection.

#6 feflicker

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Posted 03 January 2003 - 04:23 PM

Check this page out... There are many like it, but this one came up first at askjeeves...

http://www.angelfire...acon/page2.html

#7 LinksAwakening

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Posted 03 January 2003 - 09:55 PM

QUOTE (feflicker @ Jan 3 2003, 03:23 PM)
Check this page out... There are many like it, but this one came up first at askjeeves...

http://www.angelfire...acon/page2.html

Thanks for the info. That site is pretty cool, although it just restated that I will need a .6 ohm resistor. I'll try to use that .750 fuse and see if that works.

Again, thanks for the site, I will use it many more times!

#8 MorfiusX

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Posted 04 January 2003 - 07:26 AM

QUOTE (LinksAwakening @ Jan 3 2003, 03:55 PM)
QUOTE (feflicker @ Jan 3 2003, 03:23 PM)
Check this page out... There are many like it, but this one came up first at askjeeves...

http://www.angelfire...acon/page2.html

Thanks for the info. That site is pretty cool, although it just restated that I will need a .6 ohm resistor. I'll try to use that .750 fuse and see if that works.

Again, thanks for the site, I will use it many more times!

just make sure it's a fast blow type fuse (or a least not slow blow) you could try one of the automotive bus fuses (thin round ones, about an inch long). they even make mini bus fuses (that are about 1 centimeter long and 1/8inch thick, don't you just love mixing metric and us standard). I'd go the mini bus fuse. you can get them a ShadioRack(RadioShack...)

#9 LinksAwakening

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Posted 04 January 2003 - 04:20 PM

Thanks man! I'll get one of those fuses today (or at least soon), and I'll report back if it works.

Again, thanks for all your help.

#10 LinksAwakening

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Posted 05 January 2003 - 02:37 AM

Well, today I got a .75 amp fast-acting fuse from RadioShack, and it worked perfectly!! Thanks for all your help!

If anyone wants to know, it is RadioShack part #270-1004. I was going to get #270-1048, which is the same exact fuse, only half the size, but my RadioShack didn't have any left in stock. I still managed to find room, so it doesn't really matter that much.

Again, thanks for your help in clearing up this question for me!

#11 MorfiusX

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Posted 05 January 2003 - 07:22 PM

np, better than buying a new one!

#12 LinksAwakening

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Posted 05 January 2003 - 09:09 PM

QUOTE (MorfiusX @ Jan 5 2003, 06:22 PM)
np, better than buying a new one!

My thoughts exactly!!




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