Hi,
I would appreciate some guidance...
I recapped "recently" (like year ago or so) acquired M5120 and plugged it in for the first time. I got a chime and a sad mac. While trying to make it easy to access the board while powering it, it did a smoke on pin 10 on J22 (yes, it is a ground pin but the Portable case is conductive, so it touched something else where). Anyways, searched through the forum found out that pin 3 on Q4 should give you ~5.2V. I get 5.15V sometimes (usually after a small break without a charger and with a charger from PB 165c, 3A) and I can get it to chime again. Most of the times I get 0 (on battery) or 1.3 (if charger is plugged in).
The charger gives 7.6V whenever I've measured it and possibly even charges the battery (or at least I've seen it increase from 6.3V to 6.36V but it might also be the battery recovering). I have used IPA and a brush to clean board where necessary. I've never cleaned my boards by washing so if that would be the next course of action, how do you wash them? With plain water and a brush and do you use regular household oven to dry it?
Also suggested on the forum is to use flux and heat station on Hybrid, I don't currently have access to a heat station so can't really try it out. Pin 3 on Q16 and Q20 gives either 7.6V if on a charger or 6.3xV if on a battery. I guess that is correct. Pin 1 on Q16 is around 3V. Pressing RESET + NMI does not change anything on the 5V (so it stays the same it was prior pressing them, be it 0, 1.3 or 5.15).
Thanks,
Harri
I would appreciate some guidance...
I recapped "recently" (like year ago or so) acquired M5120 and plugged it in for the first time. I got a chime and a sad mac. While trying to make it easy to access the board while powering it, it did a smoke on pin 10 on J22 (yes, it is a ground pin but the Portable case is conductive, so it touched something else where). Anyways, searched through the forum found out that pin 3 on Q4 should give you ~5.2V. I get 5.15V sometimes (usually after a small break without a charger and with a charger from PB 165c, 3A) and I can get it to chime again. Most of the times I get 0 (on battery) or 1.3 (if charger is plugged in).
The charger gives 7.6V whenever I've measured it and possibly even charges the battery (or at least I've seen it increase from 6.3V to 6.36V but it might also be the battery recovering). I have used IPA and a brush to clean board where necessary. I've never cleaned my boards by washing so if that would be the next course of action, how do you wash them? With plain water and a brush and do you use regular household oven to dry it?
Also suggested on the forum is to use flux and heat station on Hybrid, I don't currently have access to a heat station so can't really try it out. Pin 3 on Q16 and Q20 gives either 7.6V if on a charger or 6.3xV if on a battery. I guess that is correct. Pin 1 on Q16 is around 3V. Pressing RESET + NMI does not change anything on the 5V (so it stays the same it was prior pressing them, be it 0, 1.3 or 5.15).
Thanks,
Harri