My two 102s are ser nos 705300125 and 704300017. My 100 is 305100966. I've no idea what market mine were meant for except that I got all 3 units from ebay in the UK.
I agree about M18, that's why I'm confused about where this corrosion came from. There was a battery leak from the 4 x AA housing but that didn't affect the M18 area. I've posted some photos on the Facebook group for those that frequent it. I had to remove C17,18 and 19 which damaged some of the pads. No big deal, I'll work around that with some delicate wiring. I've just finished testing continuity from each "pin hole" for M18 (by comparing to my other 102) and surprisingly all the tracks have survived :) I'm going to fit a socket and re-test tomorrow. Thanks for the replies. I'll try to provide more information on the component numbers and layout to see what the differences are. On 25/05/16 19:55, Mike Stein wrote: > Interesting... > > What are the serial numbers of the two machines? Most of the 'old' M100s use > a board labelled PLX110CH1X; is yours a model meant for a market other than > North America by any chance? > > Similarly, most of the T102s use a board labelled PLX144FH1X so again, I > wonder where yours came from and/or how old it is. > > But in any case there shouldn't be an issue around M18. In both the m100 and > the 102 C17 and C18 are padding caps for the crystal and go between pins 12 & > 13 to ground respectively, and C19 is merely a bypass cap from Vb to ground; > I can't see any reason why that would change. > > There are minor differences among the different M100s and the 102, mostly > related to RAM and ROM chip and connector pinouts, but nothing around M18 > that I can see (or imagine). > > See Fig. 4-16 of the M100 Service Manual or Fig. 2-12 of the 102 Tech > reference. > > m > > ----- Original Message ----- > From: "John Watson" <[email protected]> > To: "Model 100 Discussion" <[email protected]> > Sent: Wednesday, May 25, 2016 12:19 PM > Subject: [M100] Schematic needed > > >> I have a model 100 and a 102. The 102 has PCB number PLX196CH1X and the >> 100 is PLX120BH1X. >> >> I can't find any information on these boards at all. The Service Manual >> for the 100 and the Technical Reference Manual for the 102 show entirely >> different component numbers etc. I assume there are different versions >> of each computer (early/late or N American/European). >> >> My 102 has suffered from some significant and mysterious corrosion >> beneath M18 D1990AC. I have managed to remove the IC along with some >> surface mount capacitors C17, C18 and C19. However the PCB tracks are >> damaged and I need to check continuity. This is where I need the schematic. >> >> Does anyone have any good quality schematics of these boards or any >> information at all? >> >> Many thanks. >> >
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