July 21Jul 21 Hi allHave an SRNE HF2430S60-100 inverter with burnt ICs does anyone know what this section is forAnd does anyone have the Service manual.Attached is the board and burnt section.Thank you
July 22Jul 22 10 hours ago, Can said:Attached is the board and burnt section.This seems to be a Voltronic Axpert work-a-like. The second photo seems to be of the main power supply.The area around the UC3845 IC doesn't look electrically burned, so much as someone was ham fisted with flux and a reflow tool. In other words, it looks like someone has repaired this section before.An Axpert main power supply schematic such as the one in the below post can serve as a guide, but of course the parts designators (e.g. D34) will be different.
July 22Jul 22 Author 10 hours ago, Coulomb said:This seems to be a Voltronic Axpert work-a-like. The second photo seems to be of the main power supply.The area around the UC3845 IC doesn't look electrically burned, so much as someone was ham fisted with flux and a reflow tool. In other words, it looks like someone has repaired this section before.An Axpert main power supply schematic such as the one in the below post can serve as a guide, but of course the parts designators (e.g. D34) will be different.Oh thank you so much @Coulomb you have answered me...
July 22Jul 22 Author 13 hours ago, Coulomb said:This seems to be a Voltronic Axpert work-a-like. The second photo seems to be of the main power supply.The area around the UC3845 IC doesn't look electrically burned, so much as someone was ham fisted with flux and a reflow tool. In other words, it looks like someone has repaired this section before.An Axpert main power supply schematic such as the one in the below post can serve as a guide, but of course the parts designators (e.g. D34) will be different.Wanted to confirm do you know the Mosfet part number Q22 near the UC3845 ic
July 23Jul 23 15 hours ago, Can said:Wanted to confirm do you know the Mosfet part number Q22 near the UC3845 icIt's probably an IRF640, but any TO-220 MOSFET with similar specifications should work.Here is a 24V clone's power supply schematic in case it helps:
July 23Jul 23 Author 8 hours ago, Coulomb said:It's probably an IRF640, but any TO-220 MOSFET with similar specifications should work.Here is a 24V clone's power supply schematic in case it helps:Thank you so much This has definitely helped me indeed...God bless you...
Sunday at 06:344 days Author On 2026/07/23 at 5:47 PM, Can said:Thank you so much This has definitely helped me indeed...God bless you...Greetings again just realized that under the power supply section. Capacitor C24 is missing does anyone know it's value...See attached photo
Tuesday at 03:142 days On 2026/07/27 at 4:34 AM, Can said:Capacitor C24 is missing does anyone know it's value...Sometimes they just don't populate a part if they figure out that they can get away without it.To check, you'd have to find out what it connects to, e.g. that nearby transistor (perhaps across emitter and base), or a pin number on the power supply IC, etc.
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