1008C incorrect amplitude

OASJ2YSeeEhBQo1

Hi,
    I'm with a 1008C oscilloscope with the following problem:
    The device is showing an incorrect value for the amplitude of a      signal, for example, the 2Vpp test signal shows only about 400mV.      The shape of the signal looks ok, just the amplitude is wrong. It is not a problem with the      compensation output, it's working fine. I tested all inputs      with other signals and the problem was the same. The software      settings are correct too.
  

    I know it's hard to guess without more details but, do you have      any idea of what can cause this kind of problem? Is there any      procedure that I can do to test it further?
   
    I found some old threads in the forum with reports of the same      issue but, there is no more information in there:
https://www.eediscuss.com/forum.php?mod=viewthread&tid=9392 (see point 1) or another one
https://www.eediscuss.com/forum.php?mod=viewthread&tid=15121

thx

wangshuang

Does all channels have this problem or only channel 1? If only channel 1, something should be burned out.

OASJ2YSeeEhBQo1

All channels have the same problem.

wangshuang

OASJ2YSeeEhBQo1 replied at 2020-8-29 23:45
All channels have the same problem.

Hantek provides free maintenance services, and users only need to bear the round-trip freight. If you are willing to return it to the factory for repair, please provide the purchase channel and product serial number to my email address, and sales will contact you. My address is wangshuang@hantek.com

OASJ2YSeeEhBQo1

I have already sent an email to Amy before post here in the forum but I got no reply. I will send you a message.

Thx.