Author Topic: Hung Chang 5502 Oscilloscope problem  (Read 1751 times)

0 Members and 1 Guest are viewing this topic.

Offline davefigueroa

  • Contributor
  • Posts: 8
  • Country: cl
Hung Chang 5502 Oscilloscope problem
« on: February 06, 2017, 10:16:04 pm »
Hello!:
My name is Dave Figueroa, i am from Chile and I am 16 years old.
I have a HUNG CHANG 5502 Oscilloscope
My problem are the following: When I finish the calibration of the INVERT knob, I try to leave the trace at the middle of the CRT, at a first time the trace stays in the middle, but when I close the enclosure of the oscilloscope, the trace moves up or down. I do not know how the oscilloscope decalibrates itself! |O
I done the calibration again and I have the same problem. |O
The other problem is the movement of the trace when the oscilloscope turns on, because, when I finish using the oscilloscope, the trace is in the middle of the CRT and I shut down the oscilloscope, BUT when I TURN ON the oscilloscope at about 5 minutes or less, THE TRACE MOVES UP OR DOWN :-DD. And I think What's happening here?.
Awaiting your expert answerings
Dave Figueroa Osses


Other day I gonna post a photo of this oscilloscope
« Last Edit: February 06, 2017, 10:19:57 pm by davefigueroa »
 

Offline davefigueroa

  • Contributor
  • Posts: 8
  • Country: cl
Re: Hung Chang 5502 Oscilloscope problem
« Reply #1 on: February 08, 2017, 05:05:31 pm »
First Photo: The Oscilloscope
Second Photo: The trace when I turned on
Third Photo: The trace at about 3 minutes

(the traces maybe is shorted because the camera is not faster than the trace)
 

Offline Armadillo

  • Super Contributor
  • ***
  • Posts: 1725
  • Country: 00
Re: Hung Chang 5502 Oscilloscope problem
« Reply #2 on: February 09, 2017, 12:15:19 pm »
Hi;

Please read and follow the instructions as attached.

Push in knob 22 [no magnification].

then update us again. Also tell us compare to file "hc.jpg", what were your button or knobs position.

« Last Edit: February 09, 2017, 12:26:50 pm by Armadillo »
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf