| Electronics > Repair |
| Fluke 87-I repair |
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| SoundTech-LG:
Don't know if this helps at all, but on my 79II , when I removed R1 (1K fusible) there is a trace connected to the via on the inner layer that leads to RT1 that broke off. Easy to happen as R1 comes out of the board. Might be good to check. Good luck. |
| staze:
I'll check that.... but from what I could tell looking at the 87-I, it only seems like it's a front/back board. It's thick enough to be a multi-layer, but I don't see any evidence of traces on the inside of the board when holding it to a light... =/ |
| staze:
Checked with those components removed, and there's no voltage on the inputs (which, makes sense since they're basically completely disconnected from the rest of the meter at this point). So, one question that comes up is... Anyone know where I can get this: GS-3-100-9093-F-LF (3W, 909K 1% 100ppm resistor). Digikey is out of stock. http://www.digikey.com/product-detail/en/GS-3-100-9093-F-LF/989-1215-1-ND/ Can't say I've ever dealt with them having to order something. Anyone have experience? Or should I just call/email Fluke and see if they can send me replacements? Can't imagine that'll be cheap. For now, might just try to add some resistors together to get ~909K and see what I get. Though I would think all that would lead to would be way out calibration rather than anything really strange. R29 is just jellybean. Also need a replacement Fusible... looks like Mouser carries a 1K 2W 5% fusible which should work just fine. |
| Vgkid:
It looks like I will need to follow this thread, my meter reads accurately on vollts/ resistance, not so well on mv range. The Input impedance is 10M on the DCV range, and 3M+/- .4 on, with an open circuit on the AC scale. |
| SoundTech-LG:
The other thing you can do is buy a parts only Fluke on ebay, and harvest what you need. |
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