21-02-2025, 04:12 PM
As is common is this sort of low power device the mains dropper is a capacitor. Typically an X rated part whose capacitance will drop over time as it self-heals from transients. Eventually the kit may well stop working, as happened to a central heating programmer of mine. Worth replacing the capacitor if doing other repairs.
I'm very much with Gary and Jeremy on removing chips. Even with a proper re-work station it can be hard to get chips out intact. It's also kinder to the PCB to remove the pins one by one. I admit that I often use a cruder method to remove the individual pins: a light tap on the bench while the solder is molten.
I'm very much with Gary and Jeremy on removing chips. Even with a proper re-work station it can be hard to get chips out intact. It's also kinder to the PCB to remove the pins one by one. I admit that I often use a cruder method to remove the individual pins: a light tap on the bench while the solder is molten.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
