> On 23 Jul 2017, at 23:05, Rob Jarratt via cctalk <cctalk@classiccmp.org> wrote > I am trying to repair my DECstation 220 after a battery leak, and making > some reasonable progress. I have reached a component that is unknown to me, > so I don't know how it is supposed to behave. It is connected to the inputs > of a CMOS NAND gate, where I measure a steady voltage of 1.8V, but the > output of the gate is oscillating, which suggests to me that the gate can't > decide what the input is. So perhaps this mystery component could be to > blame. The marking on it is "KDS0B" (the zero could be an "oh", I am not > sure). I have a spare board with the same component where there is a marking > of "32768". Some searches suggest it might be an oscillator. >
It is, it’s a 32.768kHz oscillator for an RTC. I’ve got a few brand new ones in front of me as replacements for the battery-damaged crystal in the Executel I’m trying to resurrect. It’ll cost me a stamp to send you one up if you need it. Cheers — Adrian/Witchy Binary Dinosaurs - Celebrating Computing History from 1972 onwards
