> -----Original Message----- > From: PowerBooks [mailto:[EMAIL PROTECTED] Behalf Of Dan > K > Sent: Thursday, October 23, 2003 2:57 PM > To: PowerBooks > Subject: Re: PB 5xx Battery repair > > > "Ben Smith" <[EMAIL PROTECTED]>wrote: > >Lind that does much the same, however I have just been > re-building some 5xx > >batteries and out of 5 I was playing with 3 had faulty eeprom chips (they > >had a stuck bit and would not re-program even in a stand-alone programmer > >after removing,) I ended up copying the data from a good chip to > brand new > >chips and then running the batteries through the VST and Lind > utilities, I > >am now in the middle of checking them, so far it is looking good. > Ben, you're the first of whom I'm aware to go as far as replacing bad > eeproms with new programmed chips. Can you tell us a bit more about what > you did? eg: What sort of hardware/sw is needed, degree of difficulty, > costs (time and $$), chip type and sources, etc.? > > Is this something that could be done as a service for others? Not you > necessarily (nor I obviously) but would it be worthwhile considering the > costs vs. return? I wonder what a known-good PB500 battery eeprom board > would be worth . . . > > I figure I'd pay up to $10 -$15, which may not be (?) a very good return > for whatever it costs to 'remake'. There's an awful lot of PB500 batts > out here with bad eeproms though. I know, I've got a dozen or so myself! > :-) > > Dan K
Dan, This is not too hard, the eeprom is a 93c66 and here in the UK it is about �1 + vat (about $2 US) I removed a known good one and read it in a standard eprom programmer (you need a suitable adapter as it is a surface mount part,) and then I just copied the data to some new ones and re-fitted them to the boards. Total time (inc removing the board from the battery) about 30 min each I then used the apple battery updater (the original was not updated) and verified it with EMMpathy. This has also cured the 'sleep drain bug' that they were all previously showing. It may be possible to fit a blank eeprom and use the Lind intelligent battery utility to program it as it will reset the memory to the factory default if it is badly corrupted, however I have not tried it with a blank chip. all 3 old chips had a stuck bit in the same location ! this was confirmed with the eprom programmer, although 1 of the old chips re-programmed ok about 1 time in 10. Ben. -- PowerBooks is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac <http://lowendmac.com/lists/support.html> PowerBooks list info: <http://lowendmac.com/lists/powerbooks.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/powerbooks%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
