Recent content by clothos

Finally sorted. You was right regarding ISL6259. Nn close inspection, I found out that traces for pins 17, 18, 27 and 28 were damaged by corrosion. 4 wires later, and this A1502 is happy again. Thanks for your help. Highly appreciated.

No. I've just realised they are not. I checked PPBUS_G3H and it goes from 9.47V to 3.8V - 3.4V. And I believe the closer I get to PPVCC, the lower the voltage when shorted, which kinda makes sense.

Is there a known component on that circuit that is meant to go on and off every 4 seconds or so? Or am I just overthinking and asking the wrong question?

Hi, Thanks for your reply. Continuity issue taken on board, thank you. Crest uses sweeping frequency, so that shouldn't be a problem. To be honest, I cleaned a few boards with it before and they work just fine. Pins 7 & 3 of U1950 are acting the same way as PPVCC: 3.393V for 4 seconds 0V...

Hi, I'm new to board repair, so would appreciate some help. I've got this liquid damaged A1502 which is dead. I investigated and found a heavily corroded section, a nice board to test my brand new Crest P1200 on. :) After 3 minutes of ultrasonic on each side, a distilled water bath, an...