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Shriver drilled a hole in this poor switch card while placing trolley poles in the east end of Gifford City. The board was mounted directly to the plywood benchwork in the area, which he drilled through without checking underneath first. The hole was drilled some time ago, we're not sure when, and was only found while debugging intermittent problems with the switches it controlled. It took quite a while to find the problem, as no one expected a problem of this nature. The chip with the major damage is a driver with multiple identical circuits in it, some of which continued to work, some of which worked intermittently. The chip was replaced and the card put back into service
Bad Shriver!
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| Component side | Side view of drilled out chip | Solder side |
Tech Model Railroad Club of
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+1 617 253-3269 x3-3269 (on campus) Email: tmrc-web@mit.edu Generated Mon Nov 23 11:22:17 2009 in 0.048 secs |