Recent content by mbcontrol

Hello, i changed the Keyboard on a A1466 from english to german Layout. Everything works but the Function-Keys are not working correctly. The Functions like Volume, Keyboardbacklight brightness, Display brightness etc. are not working - with or without Fn it doesn't matter. I did SMC-Reset and...

The board is now running. Just for information: I checked all pads and traces from U5200 and couldn't find any problem. After this i changed every component arround U5200 (only U5320 i didn't change). After this the board was running. But now i don't know what the problem was :-( All...

I checked R/C5230/40 -> ok I changed Q5230/40 from a known good board i changed U5200 from a known good board I changed R5221 R5222 R5261 R5262 I change UF260 from a known good board Nothing did change anything, the board is still 5V with 0.008A

I changed U5200 before and the soldering should be ok. should I do it again?

Here are the voltages of U5200 (F5200 still removed) ... P_IN = 5.17v AUX_DET = 1.28v SMC_RST_IN = 0.03v VDD = 5.10v VDDP = 5.10v EN_MVR = 0.00v AUX_OK = 1.03v AMON = 0.03v BMON = 0,00v

I removed F5200. The voltage at C5254 is cycling 2.2v down to 1.1v every 2-3 seconds

The board stuck at 5V and 0.0079A. There is no liquid damage. The cap C5278 was burned out (had a real hole). I changed C5278 and C5222 and U5200 PPVBAT_AON_CHGR_REG have now 0,5v (diode mode) PPBUS_AON have only 1.1v What would you do next? PS: is not in DFU mode

Yes i did. And i tested with two known good Displays. i'm pritty sure it's an issue from the logicboard. Like i wrote in my first post - The Oszi shows no Datacommunication on I2C_FTCAM_SCL and I2C_FTCAM_ISOL_SCL. On two other known good boards there is a short Datacommunication at 6-9 seconds...

I changed U8502 again. And i renewed R5335, R5336, R8507 and R8508. I also paid particular attention to the soldering. Same behavior. Do you have another tip for me? Or do I have to give up the camera function.

The resistors R5336 and R8508 seemed ok, but I replaced them just in case. I can't find any problems with the traces Here are my Diodemode measurements SCL/SDA: I2C_FTCAM_ISOL_SCL = 0.72v I2C_FTCAM_ISOL_SDA = 0.72v I2C_FTCAM_SCL = 0.45v I2C_FTCAM_SDA = 0.47v Here are my Diodemode measurements...

I'm working on a A1989 with 820-00850-A. The machine came with the following issues: Camera not working, all four USB-C Ports not working and the battery needs to be changed. This Macbook was the dirtiest one I've ever seen. The entire machine was completely full of dust inside. The contacts of...

Ok, thanks for the clarification because of the RTC signals. Here are the missing values ... SMC_S5_PWRGD_VIN = 3.38v PCH_INTRUDER_L = 3.0v PCH_INTVRMEN = 3.2v

This three are shown together on page 72 in the schematic: PCH_SRTCRST_L = 3.3v PCH_CLK32K_RTCX1 = 0.4v RTC_RESET_L = (3.3v These are the only signals with PCH and RTC in the name (searching in FlexBV). Searching for RTC only, i found this two signals more: PPVOUT_S0_PCH_DCPRTC = 1.4v...

PM_BATLOW_L = 3.3v PCH_DSWVRMEN = 3.2v PM_DSW_PWRGD = 3.4v PM_RSMRST_L = 0.0v SMC_ADAPTER_EN = 3.38v I found these PCH RTC signals - did you mean this? Sorry for stupid asking :-( PCH_CLK32K_RTCX1 = 0.4v PCH_SRTCRST_L = 3.3v PPVOUT_S0_PCH_DCPRTC = 1.4v I was testing with lab PSU and Magsafe2...

I'm working on a water damaged 820-3476-A. I did a lot of work, cleaning the board and changing this parts: C5120, C7095, C7102, R7095, R7096, C3740, C2951, R7080, C5131, C1950, Q7520, Q5490, R5491, R5492, Q5480, R5481, R5482, U5110. I did a reflow for U5000. The naked board starts with 36mA...