Hello Friend ! I'm having a problem with Hantek 6074BC , during the measurement, a voltage surge occurred, the personal computer and the oscilloscope itself failed ,After measuring the voltage, it was clear that the :
1. U38 (TPS63000DRCR) - Replaced
2. D406 (B2- schottky diode) - Replaced
3. U907 and U19 (LM3671MF) - Replaced
all reference voltages are normal, except for voltage at 32 and 30 pin HMCAD1511 (HAD1511) they have a short circuit to the case and there is a slight heating of HAD1511
Program for work DSO6000 connects to the device, there is no indication from the channels.
this is not normal resistance and what else can be checked ?
Hello Friend ! Of course I was wrong! in (TP3) - (+1.8V on you foto) = 1.75v , point on th foto were "1" Ohm interlinked with the point 1.8V . If L33 set , to TP3 voltage is zero.
Yes, that's right, I deleted the items C214, C216, C213 but if L33 connected , power in L33 = "0" . I wrote to my official seller in Russia, but he said that the guarantee was already over and offered to buy another device. If there is an opportunity to purchase a microchip (had1511) from you, I would love to do it, because even in online stores in China you can’t find it.
Hello Friend ! finally I bought on aliexpress and changed HMCAD1511 , I accidentally lost one item while replacing L35 (160 Ohm resistance) can you tell me if I chose the 100 Ohm resistance there correctly and what size should I order it (0402?). The oscilloscope itself works great!
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Post time 2019-10-31 17:01:33