'Normal' through-hole radial caps should fit OK; they'll be pretty small. Good luck!
m ----- Original Message ----- From: "John Watson" <[email protected]> To: <[email protected]> Sent: Wednesday, May 25, 2016 6:17 PM Subject: Re: [M100] Schematic needed > 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. >>> >> >
