Date: Wed, 2 Mar 2005 23:32:09 -0800 (PST) From: Matt Hanson <[EMAIL PROTECTED]> Subject: RE: [LIB] Mr. Barnacle
Hey Dick... --- [EMAIL PROTECTED] wrote: > > Matt, if the component measures zero across it, and that component is > the fuse, it is good. Other devices, like resistors, may or may not be > good. Doh!! Yeah... I meant to write... "if the resistance across the fuse is >infinite<, then it's blown". Are you familiar with what fuses look like on the 50/70 & 100/110 MBs Richard? I just opened up my 70 and found the fuse that Neil had me work on is quite large compared to similar parts on the 110 MB. It's one of two such components on the 70 that's visible without removing the heat sync. The 110 has nothing that looks similar, though I haven't pull the heatsink on it to peak underneath. The fuse from the 70 wouldn't even fit under a heatsink. There are about a dozen similar components on the 110 MB that are about 1/3 the size of that 70 fuse, and quite a number even smaller. It doesn't seem any of those would be a fuse. But I'd think a fuse would look physically different, unless there are 1-2 dozen fuses on the board. That doesn't seem likely. > Usually you are measuring more than just the resistor when you > place your meter leads across the resistor - you also get parallel paths > from other components connected to the resistor. That's where my circuit testing abilities become severely handicapped. Measuring one component on its own I can deal with. Components within circuits on the other hand.... [EMAIL PROTECTED](*%! Matt > This is another case where a copy of the schematic would be extremely > helpful. I sent a letter off to Toshiba support a few weeks ago > requesting the schematic, but received no reply. > > Anyone have a contact inside Toshiba? > > Dick > > -----Original Message----- > From: Matt Hanson [mailto:[EMAIL PROTECTED] > Sent: Wednesday, March 02, 2005 2:30 PM > To: Libretto > Subject: Re: [LIB] Mr. Barnacle > > > Date: Wed, 2 Mar 2005 11:29:09 -0800 (PST) > From: Matt Hanson <[EMAIL PROTECTED]> > Subject: Re: [LIB] Mr. Barnacle > > > --- barnacle <[EMAIL PROTECTED]> wrote: > > On Sunday 27 February 2005 23:35, you wrote: > > > > > I recall you had me test to see if the resistance across the fuse on > > > > the L70 was zero, and then solder a fuse wire across the top of the > > > case. The L70 is still going after all these years. I may just > > > pull > > the L110 out and see if I can spot any fuses in it. > > > > Um, basically that was what I did - I looked for things in fuse-style > > packages - look for quite a large package and markings like '3.15' or > > > similar. > > Hmmm.... I've checked the 110 MB. I haven't yet taken the 70 apart to > look at the fuse we worked on. But it seems it looked exactly the same > as a number of other components. White case with silver metal caps on > either end. The 110 MB has dozens of components that look like that. > And it seems the 70 did too, tho' my memory is always pretty bad. > > I don't know much about circuit testing. Would any such component that > measures 0 ohms across it be bad? I know some resisters can measure > near zero, yet still are what the circuit calls for. > > Will have to take the 70 apart. I now have the original 100 MB running > in the place of the dead 110 MB, and am wondering if clocking it to 233 > might be more stable than when I had it at 266. It was always shutting > itself down at 266 due to overheating. W2K is obviously impossible to > run at 166. > > Matt __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
