Hi, I have made a new Power Supply PCB board for the oscilloscope...
One of the differences is in the main rectifier; in the older version, D5 are two SMD diodes in parallel that tend to overheat (in fact, one of them in Aldo22's post is charred...)
...
I don't think the diode is charred.
I just linked the first photo of the 8V PSU that I found. He doesn't say anything about anything being charred.
...
One of the differences is in the main rectifier; in the older version, D5 are two SMD diodes in parallel that tend to overheat (in fact, one of them in Aldo22's post is charred...), and in the newer version is a bigger through-hole device.
In the older version, there was additional filtering (L1-C7) in the +8V output (simplified schematic here), because the +5V output derived from there with a buck converter.
I remember somebody posted the schematic of the newer version, but I can't find the post. If I remember well, the +5V output comes from its own winding in the transformer (feedback to the primary from here), and +-7V has another center-tapered independent winding
The complete schematic for the older version is in the attached PDF I downloaded from another forum, but again I can't find the post (sorry for not giving credit to the author)
EDIT: I found the post where the PSU schematic was posted
@Eula
Have you removed the USB stick on the front?
Have you tried PyVisa and/or Linux? https://pyvisa.readthedocs.io/en/latest/
Zadig can take a while to install on slow computers!
I have also tried on Linux Mint, without success.
Bus 001 Device 005: ID 049f:505e Compaq Computer Corp. DSO2D15
Device Descriptor:
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idVendor 0x049f Compaq Computer Corp.
idProduct 0x505e
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iSerial 3 CN2328029051205
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(Bus Powered)
MaxPower 500mA
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Did you compensate the probe?
Doesn't make sense when any probe works nice in CH1. Something seems wrong in CH2.
After reading the FAQ I am still unsure exactly what I will need to do to change my dso2d10 to a dso2d15 when it arrives next week.