When I turn it on it says "power up failure, press menu key to continue". I press the 3 keys of MEMORY DISPLAY ON/OFF part. In the past it went back to working like a simple analog scope after a few key presses. But now I can't get out of the acq_mode setup table.
Is there a trick to get rid of these menus and obtain a simple analog scope?
Bye
-- Jean-Pierre Coulon
If you remove the case and look at the top board, near the 8088 processor (40 pin DIP, fairly obvious) there is a plug marked RESET. Move it to the reset position. That will stop the digital board from running and assuming you have no serious faults will turn the scope into an analog only scope.
If you want to repair it I suggest you go over to
Forgive the stupid question, but howe do you remove the case? I have unscrewed
2 screws at the bottom, 1 on the side, one on the top but the case won't move. Do I have to unmount all pot buttons?-- Jean-Pierre Coulon
On the back most likely.
Hi, There are 2 screws in the rear panel, one small screw on the underside near the front, one large screw on the right side towards the rear.
4 screws hold the side panel (IEEE, RS232 or Plotter).If the case will not slide back its probably been bent inwards somewhere, if its badly dinged then they can be difficult to remove. DO NOT HAMMER it, you will damage the tube.
If you can fold the handle down on top so the handle is at the rear, use your thumbs to push the chassis while gripping the handle. This usually works.
After that put the scope on its side and pull the underside round handle mount down and back. It might only move a little, do the same to the other handle mount on top. Repeat. It can take a while! Look for the chassis binding as you do it, the side panel cutout might catch on the chassis. Take your time!
Also if you do have IEEE or RS232 side panel, you need to unscrew the cable strain relief nuts.
Is that because they cause stress and open or short the wires?
There is a jumper (connects 2 out of 3 pins) with the label RESET near its rightmost position. It was in this position. I moved it to the leftmost position and now everything is perfect (for me).
Removing yhe case was difficult but possible after I removed the 2 screws of the little side panel and the 2 nuts of the IEEE connector.
Thanks to you. :-)
-- Jean-Pierre Coulon
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