Hi,
I just soldered together the K6714 relay card. Once I put the power to the board, actually nothing happens. No LED is on and no 12V are there. As I look at the transformer, there is written only twice 0 - 115 V. Our current here in Switzerland is 230V.
There is one connector for either 115 (125) and 230V.
In my oppinion there must be anything wrong ! Or am I wrong?
Further more I found a discrepance on the pcb to the sceme in the manual. The 4 diodes D17 - D20 are shown in a different way. I certainly believe, the way they look on the PCB shoulb the right way, isn’t it.
There is nothing wrong with the kit.
Can you tell us how you’ve connected the AC power cable and how did you mount de diodes?
Maybe a link to a picture?
Thank you for the replay. I have put the phase to 0 and the 230 Volt according to the manual. First I installed the diodes like on the PCB. Later I tried like shown in the manual. Tomorrow I will send a picture, OK
I checked once again the board. Now all parts are placed and soldered as per PCB. I have the phase at 0 and the neutral at 230.
At VB / GND I measure 5-6 Volt. The 4 diodes and the transformer getting hot very fast. I’m affreid they burn.
What should I try next? Should I change the diodes? Maybe they got damaged by soldering in out in out…
Most likely there is a short circuit.
Do not plug it in anymore.
A picture of both component and solderside would help a lot.
You cannot post pictures.
You must link to e.g. a free picture base.
Remove 4 diodes.
Measure secundary transformer ac voltage.
Check each diode with multimeter set to ‘diode test’. (Infinite in one direction, 0.6V in other direction). Replace if defective or doubt.
Mount diodes.
Watch out for solder bridges or shorts (could not tell from picture as resolution was too low).
Test unit
Hi
I measure 10 Volts at the transformer and I changed the Diodes. But this was not the problem. The problem was me
You were right there was a short circuit on the board, even two!!! Yes were I had to put in the bridges at the IC’s I put each one without dotted line as well.
That was the shortage. Further more I did not put in all the “J” bridges !!!
! Or am I wrong?
!!!