| Electronics > Repair |
| Fluke 289 not quite sorted. |
| << < (7/49) > >> |
| purpose:
Hi Frenky, No progress yet. Mine shows nothing on the screen, so am thinking mine is failing earlier than yours in the boot process. To the right of the battery pads is an unpopulated switch pad, marked S2 MSP RST. I'm wondering if this might be something worth exploring. peter |
| frenky:
I measured oscillators and there is no signal from it. Weird that power button works if it is connected to the IC with "sleeping" oscillator? Anyway I made a list of all ICs on the meter. (Attached pdf) It is very strange that nobody tried to reverse engineer 287/289 in the last 10 years. Or at least tried to identify all the elements on it. This would help many with repairing their faulty units. |
| frenky:
Some datasheets from known ICs: U48: (ADG714) http://www.analog.com/media/en/technical-documentation/data-sheets/ADG714_715.pdf U26: (MC9328MXS) https://www.nxp.com/docs/en/data-sheet/MC9328MXS.pdf U19: (LP324M) http://www.ti.com/lit/ds/snosbx6c/snosbx6c.pdf U16: (AD8617) http://www.analog.com/media/en/technical-documentation/data-sheets/AD8613_8617_8619.pdf U14: (LTC1968) http://cds.linear.com/docs/en/datasheet/1968f.pdf U10: (LTC939CS) Voltage Regulators - DC DC Switching Regulators Perhaps similar to: http://cds.linear.com/docs/en/datasheet/15501fa.pdf U12, U39, U40: (HK4053) Perhaps 74HC4053 https://assets.nexperia.com/documents/data-sheet/74HC_HCT4053.pdf U17: (PCYI; TPS770) http://www.ti.com/lit/ds/symlink/tps770.pdf |
| purpose:
Nice digging. When I was in touch with Fluke, they said they could help with component ident, but a bom might be out of the question. I'll try my luck. peter PS I've just fired of an e-mail. |
| frenky:
Great. Any info will be usefull. I might have identified a few more elements: 1AM (sot23) 2N3904 ARB (SC70) TPS715 338 (sot23) NDS338N or BC338 A8L (sot23) MMUN2234 2A (sot23) 2N3906 A41 (sot23) 1S2836 or OPA364 LTKH (S5) LT1615ES5-1 IL44 (sot23) perhaps BAT54S A6W (sot23) BAS16 1R (sot23) MMBT5089 EHs (sot23) BCW66H SS (sot23) BSS138 337 (sot23) NDS337N or BC337 R1E (sot23) LM4041EEM3-1.2 RAD (SC70-5) LM4041 5B1 (sot23) XC6106B032MR or XC9236A11CM JY (sot23) BAV199 6B (sot23) 2N5484 or BC817-25 |
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