Search results

I did , but maybe read it wrong

just curious, if we have 32.7 khz, does the imply we have all of these signals? Asking to try and understand

3.4 and 3.2 for the first two. I am not sure what 4 signals you are referring to. I am guessing this is to do with u1900 (I did swap it prior). I am getting 32.7khz on pin 12 of u1900

when I trigger smc_onoff_L while checking voltage of pm_slp_s4_L it stays at 0v. What is this checking for?

when I trigger SMC_ONOFF_L PM_PWRBTN_L drops fromm 3.4 volts to .3volts May I ask what this is helping us figure out?

Thanks. I am assuming trigger must mean short to ground. Can I check for a drop pulse by just holding a voltage meter on PM_PWRBTN_L? can I ask another question? how come I have 1.9volts on pp3v3_s0? Is that even possible without PM_SLP_S4_L?

I am working through a missing pm_slp_s4_L on an 820-3476. The board appears clean. here are the following readings PPVRTC_G3H : 3.3v PM_SYSRST_L :1.9v LOW? PM_PCH_PWROK: MISSING PM_RSMRST_L: 3.3v PM_PWRBTN_L: 3.3v SMC_ADAPTER_EN: 3.3v PM_BATLOW_L: 3.3v One of the issues seems to be...

I double checked everything and the numbers I gave you seem correct. I also switched r7186. From what I can tell it seems like u7100 is not pulling the voltage down on chgr_agate.

changed q7180, u7100, and r7185(just because). Still high voltage on chgr_agate_div. edit added later// let me double check all of the information I gave you. I think I may have made some mistakes

I think I follow you. Even if chgr_agate_div is not turning on, but with 12 volts at chgr_sgate you should get something coming out of the q7180.

Thank you 2informaticos for spending this extra time explaining stuff. I am asking the following question to understand, not argue. Before replacing q7180 don't we first need to get the enable fixed? On a working board both chgr_agate_div and chgr_sgate_div are about 6.5 volts. On this unworking...

I was double checking my resistance reading on ppbus_g3h and I got .610 kohm, which I think is equal to 610 ohms. I also get this same reading on a known good board. That seems to be a good reading, but I may be doing something incorrectly, which happens more than I would like to admit. no...

As you requested: ppbus_g2h resistance to ground 610ohm .123 diode mode r7180 99k r7181 62k r7185 470k r7186 300k isl6259 pin2 15.1v pin3 4v pin9 .04v pin19 5.46v pin20 5.46v May I ask a question? Is chgr_agate with its high voltage stopping q7180 from turning on? From what I think I...

did you ever rule out a bad cable?

I personally find it more beneficial to help me understand concepts than fixing the actual board

I will verify those reading for you when I get back to the shop. Am I correct in my reasoning that the gate, chgr_agate, needs to have a low voltage to turn on mosfet 7180 and that fact it is high is a problem? Helping me with these extra questions helps my general understanding and helps me...

I think I had a bad charger that killed several boards the same way. I first found a short in isl6259 on chgr_acin, which was cleared after changing the ISL. The short is gone, but I am still not getting any ppbus. I have a resistance of about 20ohms between pin 27 and 28. I have about 4ohms...

It is official, it is dead: 23k ohm.

Thanks 2informaticos for your patience and help :-) on a side note,any idea what would damage the MCP? (I have not yet verified thst is the problem, but that uneven frequency seems bad)

I will test this later. Why are we checking for less than 30k on pp3v42 ? What does that indicate? I am guessing bad mcp, if so why?