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  1. bertus

    Current limiting strategies for L298N? or use comparators.

    Hello, I have moved the necroposts to a thread of your own. You posted the necropost in this thread: Current limiting strategies for L298N?... Bertus
  2. bertus

    Z-lib.org

    Hello, Ever heard of z-lib.org? 1lib is the books section: https://1lib.nl/ It is a kind of small version of the internet archive for books. Bertus
  3. bertus

    Tek 2235 display problem

    Hello, As the diagram 48 says, the amplitude should change with the intensity. Does it change with the intensity? Did you use the settings as in the manual? bertus
  4. bertus

    Tek 2235 display problem

    Hello, How are the testpoints before 48? Are those also faulty? Bertus
  5. bertus

    Tek 2235 display problem

    Hello, Perhaps this thread on EEVBLOG helps a bit: https://www.eevblog.com/forum/testgear/tektronix-2235a-owners-any-potentialserious-problems-for-this-model/ From the page: I do not know of any specific issues with the 2235A or the 2235 series for that matter. The common issues that come...
  6. bertus

    Tek 2235 display problem

    Hello, The focus voltage can be upto 2 kV. See this snippet from the manual: Strange effects can occur when Q885 or Q804 are not working properly. Bertus
  7. bertus

    Dometic Portable Ice Maker Model HZB-12SA

    Hello, In the attached application note, the photo transistor does not have a base connection. Bertus
  8. bertus

    Tek 2235 display problem

    Hello, The voltag will be rather high. C893 wich is connected to the focus is 1 nF 3000 Volts. Bertus
  9. bertus

    Tek 2235 display problem

    Hello, The failure you are describing looks like a focus failure. When the dot is out of focus a broad line may occur. The focus is also in the high voltage section. The service manual can be obtained here: http://www.jabse.com/L1Rla3Ryb25peC8yMjM1 From that manual: Bertus
  10. bertus

    Uploading pictures to the forum

    Hello, In the dialog box this is shown: All Supported Types (*.zip *.rar *.txt *.pdf *.png *.jpg *.jpeg *.jpe *.gif *.ino *.fzz *.asc *.sym *.csv) Bertus
  11. bertus

    Vef Sigma 260 1982. No sound .

    Hello, Robotroom has a page on how to see if a bad is possibly bad: https://www.robotroom.com/Faulty-Capacitors-1.html Bertus
  12. bertus

    Vef Sigma 260 1982. No sound .

    Hello, The transistors VT2 to VT10 make the amplifier circuit. I also see some switches that lokely switch between radio and cassette. Bertus
  13. bertus

    Vef Sigma 260 1982. No sound .

    Hello, Here is a PDF with the schematic: https://www.docdroid.net/b8DsfsE/vef-sigma-260-prezentare-pdf Unfortunately the text is in russian. Bertus
  14. bertus

    JVC BR-S611U - Warning 41, tape load ok, not retracted on eject, no play/ff/rw

    Hello, The google drive link does not work. It asks for a login. Bertus
  15. bertus

    COVID-19

    https://twitter.com/ECDC_Outbreaks/status/1384884805867909123
  16. bertus

    Uploading pictures to the forum

    Hello, I often see new members asking questions about how to add attachments and images to a post. You can use the Upload a File button below the edit box to attach images and other types of files: In the new setup the buttons look like these: Please keep the attachment size under...
  17. bertus

    Uploading pictures to the forum

    Hello, I often see new members asking questions about how to add attachments and images to a post. You can use the Upload a File button below the edit box to attach images and other types of files: In the new setup the buttons look like these: Please keep the attachment size under...
  18. bertus

    Uploading pictures to the forum

    Hello, I often see new members asking questions about how to add attachments and images to a post. You can use the Upload a File button below the edit box to attach images and other types of files: In the new setup the buttons look like these: Please keep the attachment size under...
  19. bertus

    Polaroid p49fn0038k, burn dip switch location

    Hello, When you are asked to upload pictures as @73's de Edd suggested, you will have to make the smaller to be able to upload the pictures. The system can work with pictures of about 300 kB. Without the pictures we can not help you. Bertus
  20. bertus

    Polaroid p49fn0038k, burn dip switch location

    Hello, You can resize a picture in paint: Bertus
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