From: Marko Mäkelä (marko.makela_at_hut.fi)
Date: 2004-11-18 15:01:09
On Wed, Nov 17, 2004 at 08:40:10PM -0500, William Levak wrote: > Did you measure the voltage on the CASS SENSE line? A logic probe would > be ideal. It is normally at +5V, and is pulled low when the play switch > is depressed. I didn't. That's what I will be testing next. > If your 8502 is socketed you can test it by pulling it up and bending out > pin 26. If the problem persists, the 8502 is definitely bad. If it is > not socketed, you will have to cut the trace. You can solder it back > later. The chip is not socketed, but I have successfully desoldered a single pin from a solder-through chip earlier. It's not that hard. I heat the pin from the side, and then use the tip of the soldering iron or a small screwdriver as a "crowbar" to pull the pin from its hole. I haven't tried this technique for desoldering entire chips, though; there, a desoldering pump is likely to work better. Marko Message was sent through the cbm-hackers mailing list
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