You could reach out to the manufacturer, http://yihua-soldering.com/

Or check this thread at the EEVBlog:

https://www.eevblog.com/forum/repair/yi ... schematic/

First off, it looks Ike the item in the photo is a timer, probably to control power to a heating element. The diagram on the label is a pinout for the plug on the base, along with a schematic of the control actions of the timer's switch and power inputs. It looks like a replacement might be availabl...

Yes, and that kind of equipment likely once was. Unfortunately, the integrated circuit board solution is orders of magnitude less expensive and vastly more agile.

Have you brought this to the attention of the manufacturer?

Fair warning, I'm a bit of a retro fan. My suggestion would be to visit second hand shops, charity stores and similar sellers to find an item from the 50s or 60s that could be converted/perverted to your case - preferably something in Bakelite, enameled steel or brushed aluminum. https://cdn.shopify...

Yes, and, there's also going for the easy stuff. Do a quick visual looking for burnt, puffy or misaligned components. A fried resistor or capacitor, puffy electrolytic or smd that didn't pick up any solder on one end could be the culprit. Use a multimeter to check for power in a couple of places. If...

How to Build a Delay Before Turn Off Circuit with a 555 Timer Four component solution Theory, schematic, protoboard layout and video link For your future projects, the link above was the 5th result on the first page of search results using this exact sentence from your post "power up LED for 2...