CRT oscilloscope display problem !!

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • R_J
    Badcaps Legend
    • Jun 2012
    • 9535
    • Canada

    #21
    Re: CRT oscilloscope display problem !!

    These may also be of help?
    Attached Files

    Comment

    • SM-Piyes90
      Senior Member
      • Feb 2014
      • 120
      • Morocco

      #22
      Re: CRT oscilloscope display problem !!

      Thanks to all of you for the support , and for the PDFs , they will be certainly helpful .


      Last edited by SM-Piyes90; 06-08-2014, 05:18 AM.

      Comment

      • audiofreak19
        Badcaps Veteran
        • Apr 2013
        • 556
        • usa

        #23
        Re: CRT oscilloscope display problem !!

        What did you figure out with it. What was the issue

        Comment

        • SM-Piyes90
          Senior Member
          • Feb 2014
          • 120
          • Morocco

          #24
          Re: CRT oscilloscope display problem !!

          Originally posted by audiofreak19
          What did you figure out with it. What was the issue
          I have not figured anything out yet , i am still analysing the schems and mainly the attenuators circuits witch i suspect the most .

          I hope i can find something in that section .

          Comment

          • SM-Piyes90
            Senior Member
            • Feb 2014
            • 120
            • Morocco

            #25
            Re: CRT oscilloscope display problem !!

            Hi again everybody. Am back to the scope repair .

            This time i got the real5502 schemes.


            Can someone here explain how the signal is transmitted from the input to the HV crt screen?


            Here are the schemes :
            Attached Files
            Last edited by SM-Piyes90; 01-09-2015, 01:59 PM.

            Comment

            • Joseph23
              New Member
              • Jul 2021
              • 2
              • Cuba

              #26
              Re: CRT oscilloscope display problem !!

              Originally posted by stj
              o.k. i did some searching.

              they trade under the name "Protek"
              and i found a newer manual that may be close.
              hello, I have a protek 6506 with excess brightness, I hope with this diagram that you have published to be able to fix it, thanks

              Comment

              Related Topics

              Collapse

              • theone111
                Problem with LG Plasma 60PM6700 - Random power downs
                by theone111
                I have an LG Plasma TV 60PM6700 for the past ~12 years.

                In the last ~3-4 months I have been having some issues.
                1. Problem: It started with random picture disappearing (sound still worked).
                  Frequency: Happened about once a week.
                  Solution: Had to turn off TV wait a few seconds before turning it on again.
                2. Problem: Then it got worse and the TV started to shut down and when turning on the no picture just sound.
                  Frequency: Happened about once a week.
                  Solution: Had to turn off TV wait about 10-20 seconds and turn it on again to solve.
                3. Problem: TV shuts down
                ...
                07-22-2024, 10:36 AM
              • Zeonalbasta
                Thinkpad X1 Carbon "LMQ-1MB 12298-2 48.4LY26.021" VCC3M problem
                by Zeonalbasta
                i have a problem with thinkpad X1 carbon gen 2 "LMQ-1MB 12298-2 48.4LY26.021"
                The laptop was turned off because the MOSFET was not transmitting voltage. After checking it turned out that the gate pin on the MOSFET was the problem, because it was producing an inappropriate voltage. and it was discovered that the problem was with the Think engine, so I decided to reprint each pin, and finally the mosfet could work properly. However, there is another problem, even though the voltage has been supplied to the laptop, it still won't turn on, there isn't even an LED indicator. After double...
                09-13-2024, 01:17 PM
              • Gibon378
                Problem with stopping audio and video for no reason
                by Gibon378
                PC Specs:
                • CPU: Ryzen 5 1600
                • GPU: GTX 1080 Palit JetStream
                • MOBO: ASRock ab350 PRO4
                • RAM: Crucial Ballistix Sport 2x8GB 3000MHz (XMP 2.0)
                • PSU: XFX 650W (don't remember what model)
                • OS SSD: ADATA SP920
                • OS: Windows 10 21H2


                Problem description:
                Hi. I have a problem that has been going on for some time (2-3 years). It's hard to explain what it really is. Sometimes, my computer stops playing music, stops videos (starts buffering on youtube), there is no sound in games and when I minimize the game window and return to the game there is a black screen with window borders...
                11-19-2022, 09:41 AM
              • perzyk23
                Lenovo T580 - LCD Panel problem - error 0288
                by perzyk23
                Good morning,
                I have a problem with Lenovo T580, which after error code 0288 suggests a problem with the display. I checked the display and it works on another laptop. I replaced the display cable with a new one. I programmed another BIOS (downloaded from this forum) and I still have the problem of a dead display - there is an image via HDMI, and the system does not detect the built-in LCD at all. The problem appears to be hardware. What can I check to confirm or disprove this? I found many threads on the Internet related to this problem 0288, but without specific solutions. Please advise....
                10-25-2024, 12:42 AM
              • SDNarcia
                Dell 15R-5521 keyboard problem (KBC?)
                by SDNarcia
                Hello, I have a Dell 15R-5521, with the problem that the Ctrl, Alt, Shitf and Num Lock keys do not work, I tested the keyboard with a keyboard tester and it is functional, I also got another new keyboard and the computer has the same problem with the same keys. Check continuity between the ZIF connector from the keyboard to the KBC and all pins are correct. I cleaned the ZIF connector and the KBC and I still have the same problem. I reinstalled windows just in case, and it didn't work. I updated the BIOS to the latest version A16 and there were no changes.

                As additional information,...
                07-20-2024, 10:47 PM
              • Loading...
              • No more items.
              Working...