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Old 06-02-2019, 05:29 PM   #3
redwire
Badcaps Veteran
 
Join Date: Dec 2010
City & State: Alberta
My Country: Canada
Posts: 1,313
Default Re: KSGER STM32 T12 soldering stations

Here's the schematic I drew of the KSGER soldering station 24V PSU for service and repair.
Soldering Power V2.04 and pig with bull horns icon on the silkscreen.
KSGER 96W 24V 5A Electric Power Supply Unit For STM32 STC OLED T12 Digital DIY Soldering Station Controller.

It has some clearance mistakes running +HV trace underneath heatsink and a thin PE ground trace, no connection to the chassis
The TL431 is set to over 25VDC output and it has no bias resistor. The snubber cap is pretty cheap. Could not find datasheets on the CR8642S PWM controller.
Earlier version PSU's like V2.01, V2.02, V2.03 are the same but no pads for a mystery DPAK part or different DC connector.
Attached Images
File Type: jpg KSGERT12 24V PSU 2_1S.jpg (98.5 KB, 14 views)
File Type: jpg KSGERT12 24V PSU 2_1S side.jpg (98.9 KB, 10 views)
Attached Files
File Type: pdf KSGER_T12_24V_PSU_schematic_rev1.pdf (23.3 KB, 18 views)
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