

Thanks!!!
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The circuit itself is pretty basic. Easily rebuilt with extra components I have, EXCEPT for the mystery chip! Anybody have an idea what it may be?...I also thought the other component to be a speaker possibly, but the owner said nothing about sound ha ha.Looks like a loudspeaker and a custom made IC under the blob which will be next to impossible to repair/replaced.
Hmmmm another possibility. I need to ask the owner a couple of questionsThe disk could be a microphone. Is the fountain supposed to respond to sound?
The grey blob is hiding an IC called a 'chip-on-board'.
I may go that route now that most people seem to think the chip is impossible to replace/identify...Initially I just drew the circuit and was going to just replace the components and put them on my own little PCB.Fresh solder on everything, then start a more detailed diagnostics.
Look at the traces leading away from the chip. It looks like a 6-pin chip. These are also called 'blob-chips'. Once you identify power-pins, see if you can get an idea what the other pins are for. Normally, it's going to fall into a couple of categories- things that deal with A/C power (like SCRs, or bridges), or it will be a micro-controller, like an Atmel tiny or something like that. If you can identify most of the pins, see if it matches a through-hole equivalent for one of the others, and compare that against the schematic you make from the traces an what it's supposed to do.The circuit itself is pretty basic. Easily rebuilt with extra components I have, EXCEPT for the mystery chip! Anybody have an idea what it may be?...I also thought the other component to be a speaker possibly, but the owner said nothing about sound ha ha.
Thanks. I did a rough sketch last night. I'll probably redo it on the PC to make it more readable and accurate. I have to say you can learn a lot just by sketching the traces and components. A necessity in reverse engineering I suppose. After I do a semi decent schematic I may post it on here. I'm pretty sure at this point that mystery component was a speaker for some sound effects. Honestly, I'd rather leave that out. All I'm after is getting the water flowing. Maybe I can leave the chip out entirely. Perhaps that's why it's in there. Anyways, thank you for your input and I'll post again in my down time.Look at the traces leading away from the chip. It looks like a 6-pin chip. These are also called 'blob-chips'. Once you identify power-pins, see if you can get an idea what the other pins are for. Normally, it's going to fall into a couple of categories- things that deal with A/C power (like SCRs, or bridges), or it will be a micro-controller, like an Atmel tiny or something like that. If you can identify most of the pins, see if it matches a through-hole equivalent for one of the others, and compare that against the schematic you make from the traces an what it's supposed to do.
Can you give me a clue?...Ok, based on your comment and white haired novice I will take a second look. Keep in mind I've had to really do some digging into this thing (with a mini grinder) As you know, many products from China are designed for no entry.It can't work as drawn
Thanks for taking the time to do the drawing, much appreciated. As far as the disc goes what might this component be called? How does it determine water level/pressure? I'll try to get back to this project in more detail as time allows. The start of the new work week sucks up all my free time.Need to see more then you have shown.
Picture how it was all installed a full top and bottom of the circuit board.
The disk is to tell if there is water in the tank so you don't run the pump dry more then likely.
The motor will not power as you show it
Q1 is a short need's to be something like this I left emf diode out because lot's of these things use part with one made into the transistor. I have a bunch of npn that switched small motor after finding datasheet showed diode made into part.
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Thanks as well for taking the time to do the schematic. I agree, something isn't right. I need to go back and carefully draw again and see where I got off. They covered everything in the worst hot glue I've seen and I had to do a bit of damage(cutting,scraping) to even get a glimpse. That's why I was just more interested in rebuilding it all together after I know I have something workable- why I'm consulting the pros here at AACI redrawn your schematic and it is now easier to see what are the unreasonable areas.
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