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I'm not asking for specifics more general theory. The unit has two large heatsinks covering the components only the back surface mount stuff is visible currently. -
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How to troubleshoot dead power brick
I have an adjustable power supply having a selectable voltage from 15v to 24v. It was sold as a universal soundbar power supply.
It has been outdoors in the elements powering a set of outdoor bluetooth rock speakers until recently when it stopped working. (ya ya I know...)
I opened it and it looks like there was some liquid ingress but I can't find any shorted silicon and the fuse is not blown. I measure about 160v dc after the bridge rectifier but nothing at the main cap. I suspect the power ic is not running. Obviously there is no voltage on the secondary either.
How would I go about determining if the power ic has failed or what would be my next thing to look at ?
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Hello!
i got a damaged Manson NTP-5561 (60V, 1,6A DC output) and and the main issue is that the controler IC for the LCD display has a short. The controler IC PIC18F87K90 is mounted on the back of the back of the LCD. Vss-Vdd = 3 Ohm. The 5V and 3,3V power line was killed as well, but that is not a problem. A new LDO 3,3V and 5V 7805 is already ordered.
Replacing the PIC18F87K90 is necessary but that makes no sense without having the HEX dump of the new controler.
Does anybody have such a power supply and could do a HEX dump of the Flash and EEPROM memory?
...04-12-2025, 10:38 AM -
I have wanting to do this project for quite sometime now and I finally found a switching power supply that will work on this desoldering gun station ZD-915 that the original switching power supply took a shit and just was not worth trying to fix it because this switching power is not quite big enough to handle the heater element and the vacuum pump
One note when I tested the switching power supply and the voltage control board I noticed that this desoldering gun heat up much faster than the original switching power supply which I was really surprised by to the point that I might buy... -
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