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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Surface-mount aluminum electrolytic capacitor codes/identification
I'm working on a computer motherboard that has suddenly decided not to
power up/initialize. Originally it began powering on and sitting there not doing much of anything, but now it stops sending the power signal to the PSU as soon as it is powered on, and clicks back off. The board has many surface-mount electrolytic capacitors, some of which are bulging a bit on the top, and I'm thinking this may be the cause of the problem. There are no through-hole mounted capacitors. I'm going to try to replace them. The problem is that I don't understand the codes on the capacitors and am not sure which values to use when replacing them. I have tried conversion charts on the Web, but I'm not sure whether the first number is the value or the second number is. Hopefully someone can translate them for me... 11 of them have the following (exactly) stamped upon them: h3 47 16V 3 of them have the following stamped: 14 100 6V BTW, if it helps, this is the motherboard out of an Apple Macintosh Performa 6400/200 ("Alchemy"-based motherboard). Thank you! |
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