| Products > Test Equipment |
| Rigol MSO 5000 hardware/software revisions |
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| Martin72:
It´s definitely lower rpm, as if the fan got now less voltage than before - would speak for a resistor, but I couldn´t see anyone additional in the wire. Maybe they´ve exchanged the fan....ah, want to take a look inside so badly. 8) |
| Martin72:
--- Quote ---Maybe they´ve exchanged the fan. --- End quote --- Couldn´t resist any longer…. After open it up (without damaging the sticker…) I take a close look to the fan - Nothing. No additional parts, no "fresh" solderpads, nothing.... So they must Exchange the fan - No, it´s the same Sunon MagLev as before, 12V 3000rpm. So I switch the scope on - this is never 3000 rpm…. Measure the voltage at the fan-connector, 6.5Vdc. This make sense, voltage is reduced for lower rpm. But the "jittering" on the display of my fluke made me curious and so I plug in a probe and measure the voltage with scope: Aha... ;) |
| hhappy1:
--- Quote from: Martin72 on July 16, 2019, 11:04:47 am --- --- Quote ---Maybe they´ve exchanged the fan. --- End quote --- Couldn´t resist any longer…. After open it up (without damaging the sticker…) I take a close look to the fan - Nothing. No additional parts, no "fresh" solderpads, nothing.... So they must Exchange the fan - No, it´s the same Sunon MagLev as before, 12V 3000rpm. So I switch the scope on - this is never 3000 rpm…. Measure the voltage at the fan-connector, 6.5Vdc. This make sense, voltage is reduced for lower rpm. But the "jittering" on the display of my fluke made me curious and so I plug in a probe and measure the voltage with scope: Aha... ;) --- End quote --- Ho~~ How do I remove a sticker without damaging it? I'll measure the voltage of my product. |
| Martin72:
By heaten it up with e.g. a heatgun. 90°C are enough, too high will damage it. Slowly heaten up, then lift it on one side carefully with a razorblade or similar thin thing. |
| alexvg:
--- Quote from: Martin72 on July 16, 2019, 02:30:54 pm ---By heaten it up with e.g. a heatgun. 90°C are enough, too high will damage it. Slowly heaten up, then lift it on one side carefully with a razorblade or similar thin thing. --- End quote --- I've leaved the device running for 3-4 hours (the device's case is been hot). And I've removed the sticker with the back paper of a bandage (the non-adherent side or anything like that). It takes 20-30 seconds to remove it completely. |
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