150/180 Watt Electronic Dummy Load under-voltage fix

CrAzYDr1veR

New member
Joined
Oct 10, 2019
Messages
5
i asked them about that and they told me the chip on the right had to be changed, must be the microcontroller. Looks like negative is welded on both capacitors

if you are able to take a better pic we could maybe find if they cut the voltage feed somewhere before welding it o the other side
Coulour display model

image_repopr.jpg


Edit:

Unlike the couloured model iwas able to find the positive voltage feed on my older model like the op
but voltage reading is still bad, so 3 wire is a no go.
Need to find the negative to do a 4 wire setup

image_nhwgee.jpg


image_lyibwn.jpg
 

Hank

New member
Joined
Apr 22, 2020
Messages
11
i asked them about that and they told me the chip on the right had to be changed, must be the microcontroller. Looks like negative is welded on both capacitors

if you are able to take a better pic we could maybe find if they cut the voltage feed somewhere before welding it o the other side
Coulour display model

View attachment 15473


Edit:

Unlike the couloured model iwas able to find the positive voltage feed on my older model like the op
but voltage reading is still bad, so 3 wire is a no go.
Need to find the negative to do a 4 wire setup

View attachment 12251


View attachment 11109
Hi all,

I have same device as one on the picture above. And I am not able to find negative to do four wire setup, is any one able to help me? Please.

Regards,

Hank
 
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