Timeline for Identifying blown-up SMD component based on surrounding chips and found photos of similar devices
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 24 at 16:22 | answer | added | Sim Son | timeline score: 1 | |
| Sep 24 at 16:20 | answer | added | Tim Williams | timeline score: 1 | |
| Sep 24 at 15:46 | comment | added | user317139 | I just believe C9 is a tantalum capacitor. Sometimes one do a repair by adding a good capa to the bad one, without removing it. Desolder C9 and try to analyse it (cut it in half with a small grinder). Maybe its capacity is not totaly gone, try to measure it anyway. | |
| Sep 24 at 15:45 | comment | added | Tim Williams | ICL7660*, right? | |
| Sep 24 at 15:25 | comment | added | Lundin | Your pictures are confusing, the boards are routed slightly differently. It can't very well be a series capacitor since this looks neither like AC nor RF electronics. Assuming it is is a bulk decoupling cap, not unlikely around the same 10uF flavour as the rest. Now if you desolder the charcoal remains, you'll probably find a ground via underneath it and which pad it goes to will matter, as this looks like 2 layer design where C9 is a bulk cap belonging either to the Q3 part or the U9 part. | |
| Sep 24 at 15:24 | answer | added | citizen | timeline score: 0 | |
| Sep 24 at 15:11 | history | edited | Kyle Gagnon | CC BY-SA 4.0 |
added 194 characters in body
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| Sep 24 at 15:09 | comment | added | Kyle Gagnon | Sorry, I forgot to add that to the post. I have inspected the ICL7760 datasheet, and there are lots of example circuits, but none seem to match what seems to be going on here. It does tell me, though, that those 2 10u tantalum caps are part of the 7760 circuit. | |
| S Sep 24 at 15:05 | review | First questions | |||
| Sep 24 at 16:26 | |||||
| S Sep 24 at 15:05 | history | asked | Kyle Gagnon | CC BY-SA 4.0 |