HAMEG HM 504 - Page 1
Forum section: electronics / repair

author: lionelkjh
author_rank: Frequent Contributor
timestamp: December 22, 2016, 11:42:13 am
content: Hello; I am looking for the complete diagram of my oscilloscope HAMEG HM 504 (broken down, can someone help me ?? (I found some diagrams but it is missing) .... Thank you for your kindness ... .

author: Gyro
author_rank: Super Contributor
timestamp: December 22, 2016, 11:52:07 am
content: Hi,You'll have much better success if you ask the Mods to move your post to either the 'Repair' or Test Equipment' sections rather than 'Metrology'.

author: Falkra
author_rank: Regular Contributor
timestamp: December 22, 2016, 03:54:38 pm
content: Hi, did you check those links ?http://elektrotanya.com/?q=showresult&what=HAMEG%20504&kategoria=&kat2=all

author: lionelkjh
author_rank: Frequent Contributor
timestamp: December 22, 2016, 04:34:16 pm
content: Good evening, thank you for having answered. The 2 download links go to the user manual, and the last one only leads to a part of the diagram of the oscilloscope. This is a pity, because it is this part that I miss to repair my oscilloscope ..... Cdt

author: Falkra
author_rank: Regular Contributor
timestamp: December 22, 2016, 07:00:16 pm
content: Hmmm, maybe here then (I chekced the link, it gives schematics, but quality is between poor and ok) :http://www.eserviceinfo.com/downloadsm/44348/Hameg_HM-504.html

author: Fisher77
author_rank: Regular Contributor
timestamp: December 22, 2016, 07:16:43 pm
content: Quote from: Falkra on December 22, 2016, 07:00:16 pmI was looking at that to. The power supply schematic is labeled 1004-2. Dont know if that is correct or not.Links to pics on the above website:https://i.imgsafe.org/c2842b82ac.pnghttps://i.imgsafe.org/c2846b3ed9.pnghttps://i.imgsafe.org/c284bbbb82.pnghttps://i.imgsafe.org/c284f454c4.png

author: lionelkjh
author_rank: Frequent Contributor
timestamp: December 24, 2016, 02:16:07 pm
content: Hello; I was able to have all the diagrams of my oscilloscope with me from Hameg in Germany. Thank you for your help!

author: Falkra
author_rank: Regular Contributor
timestamp: December 24, 2016, 04:38:18 pm
content: Ok, great.Feel free to post them so other membres can upload them (if legal, of course).

author: lionelkjh
author_rank: Frequent Contributor
timestamp: December 27, 2016, 04:02:21 pm
content: Good evening, thank you is nice. I encounter the following breakdown on this same oscilloscope: I have two tracks scarcely visible on the screen by fully rising the intensity button. I have checked the supply voltages: they are good. On the other hand the high voltage (measured with a probe) is raised to: -800V instead of: -2000V! . What is the possible cause of the failure?? Thank you for your help!

author: stj
author_rank: Super Contributor
timestamp: December 27, 2016, 04:19:52 pm
content: why ask us, your the one hording the schematics!

author: oldway
author_rank: Super Contributor
timestamp: December 27, 2016, 08:58:50 pm
content: If the 2 transistors of the high voltage oscillator are working very hot, the most likely fault is a defective high voltage transformer.To troubleshoot this kind of problems, the ideal is to have another osciloscope of the same type as donor for spare parts.The first thing I would do is to replace this HV transformer by another known as good working and look if this solve the problem.

author: lionelkjh
author_rank: Frequent Contributor
timestamp: December 28, 2016, 11:40:40 am
content: Hello; problem solved. The fault was the capacitor C1061 (33nF / 63V) which was leaking. After replacement, the traces are fine and sharp. Cdt

author: AwaisN
author_rank: Newbie
timestamp: August 05, 2024, 07:26:32 am
content: Hi,Could you share the manual/diagrams which you got from Hameg Germany?Thanks and regards