User`s guide

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From: George Rentovich
010- I'm afraid that oxidation on pins may be causing bad
contacts and memory problems. How can I remove the
oxidation without resorting to sand paper?
Tarn-X works great for removing oxididation from chip pins without a lot of
work or risk in harming the chips.
Soak the chips in a shot glass until all black oxidation is gone; then,
remove the chips and put them in another shot glass with alcohol to rinse. I use
a third shot glass with alchol again to be sure and, then, take out the chips
and let dry.
______________________________
From: Rubywand
011- Recently I was using my GS and smoke started coming
from the inside. Now my ADB peripherals (KB and mouse)
don't work! It looks like the smoke came from an 8-legged
module in the upper leftmost corner right behind the
composite video connector and ADB jack. What's wrong? How
can I fix my GS?
The module you are talking about is L2 "D-15C". This is an 8-pin thing
containing four inductors (coils). Three inductors are used. They are in series
with the ADB Desktop connector. Evidently, one of the inductors burned out. This
would explain the smoke and the loss of ADB functioning.
The three inductors run ...
pin 1 to pin 8
pin 2 to pin 7
pin 3 to pin 6
You can use an Ohm meter to detect which one is open. (Example: the correct
reading from pin 2 to pin 7 would, probably, be less than an Ohm.) Since the
pin2-pin7 inductor connects to +5V on the pin7 side, it is the best candidate
for a burn out should pin2 some how have been shorted to ground.
Note: Jon Christopher reported that when his L2 module bombed it was due to a
short in a spliced-on KB cable. It turned out that the resulting burn out fused
some of the inductors together inside the module. So, if you detect any break
after such a burn out, it is probably best to just remove the module and replace
all three inductors.
Replacing the inductors should be fairly easy, although it will probably be
necessary to remove the motherboard. The value of the inductors is not critical,