DER EE DE-5000 LCR meter - damaged  - Page 1
Forum section: electronics / repair

author: Jane
author_rank: Frequent Contributor
timestamp: September 14, 2016, 04:51:08 pm
content: I have a DER EE DE-5000 LCR meter, which was damaged by a high voltage ( about 220V).As you can see, from a picture, there are some burnt items( resistors) by that high voltage .Does anyone know what values are those burnt resistors?Besides DE-5000 LCR can not be turned on now.Is there any schematic of DER EE DE-5000 available?Has anyone tried to repair that kind of LCR meter successfully?Thank you for your feedback

author: k1mgy
author_rank: Regular Contributor
timestamp: September 14, 2016, 05:17:02 pm
content: Hopefully the damage is limited to components peripheral to the IC. Given what I can read from the photograph, even high value resistors fried. Yikes.This is such a sweet meter.I will open mine up (very carefully) tomorrow and get some photos for you.Never saw a schematic for it, but perhaps the folks in Japan who sell it can help you.

author: TheBay
author_rank: Unknown
timestamp: September 14, 2016, 05:17:51 pm
content: Not sure if it's the pictures, but sadly it looks like IC DM 5000-2C has a crack in it and released the magic smoke.

author: TheSteve
author_rank: Unknown
timestamp: September 14, 2016, 05:36:07 pm
content: Quote from: TheBay on September 14, 2016, 05:17:51 pmIt does look like there is a crack in it - right in the spot you'd expect it to be based on where the burnt parts are.

author: Jane
author_rank: Frequent Contributor
timestamp: September 14, 2016, 07:43:50 pm
content: Thank you all for your replies.@k1mgy: I will wait for your resistor values.Thank you

author: PA0PBZ
author_rank: Super Contributor
timestamp: September 14, 2016, 07:53:07 pm
content: Quote from: Jane on September 14, 2016, 07:43:50 pmForget it, the chip is 100% dead.

author: Nuno_pt
author_rank: Frequent Contributor
timestamp: September 14, 2016, 08:23:18 pm
content: If the picture is good, I see two cracks, one below the 5000, and another line one the left side.So the chip has release the magic smoke.

author: Jane
author_rank: Frequent Contributor
timestamp: September 15, 2016, 02:25:04 pm
content: I checked under microscope and unfortunately that IC is really cracked. Is there any possibility to buy that IC anywhere?(I think it should be ES51920 by Cyrustek)Thank you for suggestions

author: k1mgy
author_rank: Regular Contributor
timestamp: September 16, 2016, 11:09:17 am
content: The 0805 resistors are all 1.0K. The 0603 resistors to the right are 100.0 and 1.0K (left to right order). See photo.Good luck!

author: Jane
author_rank: Frequent Contributor
timestamp: September 16, 2016, 05:55:29 pm
content: @k1mgy: Thank you very much for sending those resistors valuesUnfortunately that DM5000-2C-02( should be ES51920 by Cyrustek) is also cracked. Do you happen to know where it can be bought?

author: k1mgy
author_rank: Regular Contributor
timestamp: September 16, 2016, 07:19:26 pm
content: No, sorry. You might check with the manufacturer.However I suspect if this is replaced it will need recalibration./m

author: markce
author_rank: Regular Contributor
timestamp: September 16, 2016, 08:15:17 pm
content: The IC is supposed to be a Cyrustek ES51920 (?), which is part of the LCR meter chipset.Given the price of the DER EE5000, I think you better buy a new LCR meter.The DER EE5000 definitely is not good for in-circuit measurements.

author: nanofrog
author_rank: Super Contributor
timestamp: September 17, 2016, 05:07:30 am
content: Whether you're testing components in or out of circuit with the DER EE DE-5000, capacitors must be discharged first as there's no protections for the meter if you don't.

author: kripton2035
author_rank: Super Contributor
timestamp: September 17, 2016, 07:45:34 am
content: try to ask for a sample of each at cyrustek sales representatives.they sended one chip to a member of this forum that had the chip burned like you.worth a try, otherwise these chips are not for public sales, you will have to buy another dm5000(or a protected esr meter for live measurments !)