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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: capaciotor markings for replacement? posted by airtime on April 18, 2003 at 15:55:34:
Hi airtime!47NJ is most likely 47nF, or 0.047uF.
2N2 is most likely 2.2nF, or 0.0022uF
(*no, pF is pF, for small values you shall see something like a 3-digit designation such as "102" or similar)
As for thermal resistors it's best to pull it off and test it with a AVM (analog VM meter). If you get resistance measurement out of it then the first step is to suspect that has resistive characteristics in it (given the vast array of newly designed/produced combo components avail out in the market these days, I wouldn't bet on it being completely a thermal resistor).
Retrace your schematics to see the whereabouts of the "component" is situated. If it's connected in series to the primary winding of a power transformer or so it's likely to be a slow turn-on resistor; if it connects to the primary in parallel fashion then be suspicious that it's a spike arrestor (MOV).
For diodes FR represents a line of Si diode (if my memory serves it's probably from TFK). You should be able to safely replace them with Motorola MUR, ordinary general instrument UF series, etc.
As for zeners it's best to test it while it's in operation (you can approximate the voltage and it's wattage rating that way).No markings, no deal. It's too hard to guess w/o any signs or schematics.
Warning though: for 1N series of diode family comprised of both ordinary rectification diodes, signal diodes as well as zeners so be careful!
Quest;^>
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Follow Ups
- Re: capaciotor markings for replacement? - Quest 07:29:54 04/19/03 (0)
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