Hameg HMO352x HMO3522

• Hameg HMO352x HMO3522
  Posted by ino5on on 30 Jun, 2016 08:16
• Hello to all
  My Hameg HMO3522 did shut down while doing nothing and won't turn on again. 
  Does anyone has the schematic / service manual ?
  Thanks for your help.
• #1 Reply
  Posted by kripton2035 on 30 Jun, 2016 10:27
• you can ask the hameg support on their web site - they are very helpful.
  isn't it still under warranty ?
• #2 Reply
  Posted by ino5on on 30 Jun, 2016 10:33
• no more warranty and rode & schwarz won't send me the service manual, I should send it in. But why spend a lot of money, if I could fix it my self.
• #3 Reply
  Posted by nctnico on 30 Jun, 2016 11:14
• You could check the fuses and the power supply IF you have experience with repairing these kind of circuits.
• #4 Reply
  Posted by ino5on on 30 Jun, 2016 11:28
• I can measure the voltage behind the rectifier (german Gleichrichter) but there is no more voltage at the transformer (german Übertrager)
• #5 Reply
  Posted by kripton2035 on 30 Jun, 2016 11:43
• http://www.repairfaq.org/sam/smpsfaq.htm#smpssfmod
  
  don't forget to read the safety measures before ...
• #6 Reply
  Posted by ino5on on 30 Jun, 2016 11:56
• I got an FI Switch
  Just kidding
  
  It seems I have a lot to read
• #7 Reply
  Posted by nctnico on 30 Jun, 2016 19:22
• If you have the SMSP removed from the scope perhaps you could make some high-res pictures and post them somewhere with a link here. What often helps is to identify the switcher chip used and then look for a datasheet or even better an application note with a circuit which closely matches the PSU at hand. The datasheet is likely to also help to give a detailed description of the chip and how the circuit works.
  There are many checks you can do before actually applying mains voltage to the PSU with all the asociated dangers.
  
• #8 Reply
  Posted by kripton2035 on 01 Jul, 2016 05:59
• Quote from: ino5on on 30 Jun, 2016 11:56

  I got an FI Switch
  Just kidding
  It seems I have a lot to read
  

  fixing smps is quite easy in the long run (but lot of the time is it worth fixing or replacing ?)
  but I've never been able to fix smps with PFC that are far more difficult to understand.