Raptor Posted July 16 Posted July 16 Does anyone know how to adjust the voltage of the Begode ET Max charger to a higher level? At the moment, the factory setting is only 166V ! Quote
alcatraz Posted July 17 Posted July 17 I've never seen this design before with four transformers. See those blue little square thingies to the left. They're potentiometers. If the output is four dc converters in series, you might need to measure the output on each and adjust whichever potentiometer corresponding to the low output. I'd try to get them equal. 42.10-42.15v. Added together that's 168.5v. Quote
alcatraz Posted July 17 Posted July 17 I'm not sure the pots to the left are the output pots. But that's what you're looking for. Quote
daniel1234 Posted July 17 Posted July 17 50 minutes ago, alcatraz said: I've never seen this design before with four transformers. To me, it looks like 4 power supplies in one box connected either in series or in parallel. I can see 4 control DC-DC IC boards. There are more reasons why we don't do it - I would be curious to know more why they did this. If is in parallel you need to move all blue pots a little. There is probably dedicated measuring for each stage. I cannot help myself it doesn't look safe and it cannot have CE certification. My advice is to buy real huawei power supply if you spend that money on ET max ! Don't touch pots without gloves and use a ceramic screwdriver if you wanna tune it under power! 160+ V DC is no fun. 1 Quote
Robse Posted July 17 Posted July 17 it looks like parallel, the trafos are all 168V, and there's even temp sensors at the capacitors!?? I would NOT fiddle with the blue resistors in any way. Quote
Planemo Posted July 17 Posted July 17 When I opened up my old 6A YZ charger it had two identical boards in it so I assumed they were parallel, each 3A. You should be able to probe the output of each board to see what it's doing. If it's around 42v then you know they are serial, if not then it's parallel. If serial you will need to bring each board up a little via the pot, if parallel there may be a further pot somewhere. As has been said, utmost care required when sticking anything inside these units. Quote
alcatraz Posted July 17 Posted July 17 It's a pretty good chance they're in serial because that's why they're using transformers in the first place. To isolate the output ground and allow the outputs to be connected in serial. If they had four low amp 168.5v power supplies in parallel they could all just share one transformer. Quote
alcatraz Posted July 17 Posted July 17 But that's just my guess... and I'm not an electrical engineer. Quote
alcatraz Posted July 17 Posted July 17 A few measurements with a multimeter will answer that... Quote
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