croissantking
Well-known member
Have now tried a third EMM board - oh dear.
YesAll four ribbon wires are connected?
YesThe continuity is there from the external pads (on the case) to the emm board?
Yes, although my multimeter reads -5V on pin 14.You are seeing power get to the EMM chip with the battery connected? I think Vcc was pin 14 and ground was pin 28 (on my phone right now so can’t check but I had it in one of my threads).
Yep, I think so. I cleaned up the battery contacts with IPA and then used some deoxit on those plus the internal spring loaded connectors.The internal spring loaded connectors in the battery bay are making contact with the battery external pads? You can also check continuity all the way through.
Yep.
- The battery pack has some charge?
Recapped, yep.Also no corrosion on the internal spring loaded contacts?
Oh and was the one SMD cap on the main board near the spring loaded contacts replaced? I think someone mentioned it might be involved with the battery functions.
I don’t get 5V - it’s reading 0.03V. What could be wrong?View attachment 73317
You should get around 5 volts between battery negative and the pin shown in the photo. Mine’s a little low because I still haven’t rigged up a power supply with working VBATT so I can’t actually charge my otherwise working battery…
Well, I got one of my EMM boards to work, it puts out 5V on the communication pin. Lind and Emmpathy tell me it has an uncorrectable error, so I don’t really know if it’s salvageable. However, it’s taking a charge as we speak.
Physically broken, probably happened while dismantling?Was the transistor physically damaged or did you test it somehow?
Just curious, which transistor went bad for you?
Mine wasn't physically broken like yours (or maybe it was, I just wasn't visually able to see damage).