Purchased a Wallas 3000D diesel heater for a song and a dance a couple of days ago. Old model, been used in a boat. As everyone knows, electronics and the ocean breeze is a perfect combination, and of course the circuit board is in nothing but a perfect, 10/10 condition. As can be documented in the following pictures...
Just... perfect.
Needless to say, there are no schematics or component lists available. Or spares, for that matter So with all the conditions aligning so perfectly I decided to try to restore it. Naturally. What else could I do? Just write it off because it quite clearly isn't worth it?
Of course not. That'd be too... sane.
*Reaches for the happy pills*
Did I mention that everything has been soaked in a brittle compound that turns in to jelly when heated. But of course it is.
In the next picture I have already removed and tested the components, as well as cleaned most of the gunk off the bits in the lower right hand corner. I had to remove the two terminals, and the one with the pins... the pins were pitted and all the tin on it had just...vanished. Re-tinned them and put them back as I have no spares...
removed an IC and cleaned up the pads as best as could be done. Everything is through hole and the holes are tinned through as there are traces on both sides.
I found a few of these botches. Thankfully the LM324N is readily available, because shortly after this picture was taken one of the legs just fell off.
Just... perfect.
Needless to say, there are no schematics or component lists available. Or spares, for that matter So with all the conditions aligning so perfectly I decided to try to restore it. Naturally. What else could I do? Just write it off because it quite clearly isn't worth it?
Of course not. That'd be too... sane.
*Reaches for the happy pills*
Did I mention that everything has been soaked in a brittle compound that turns in to jelly when heated. But of course it is.
In the next picture I have already removed and tested the components, as well as cleaned most of the gunk off the bits in the lower right hand corner. I had to remove the two terminals, and the one with the pins... the pins were pitted and all the tin on it had just...vanished. Re-tinned them and put them back as I have no spares...
removed an IC and cleaned up the pads as best as could be done. Everything is through hole and the holes are tinned through as there are traces on both sides.
I found a few of these botches. Thankfully the LM324N is readily available, because shortly after this picture was taken one of the legs just fell off.
