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PP3V3_G3H_PMU_VIN_RTC_R: fluctuates between 3.277V to 3.296V PP3V3_G3H fluctuates between 2.2V and 3.3V LDO_CORE: 1.5V LDO0: 0.800V and drops to 0V LDO1: 3V sometimes drops to 0V LDO2: 1.2V sometimes drops to 0V LDO3: 1.8V no drop LDO_RTC: 1.505V no drop After testing, all drops occur at...

Alright, I didn't know. Thanks for this information. PPBUS_G3H: 12.3V I performed all my tests without the audio flex connected. Unfortunately, I'm not sure where to look now. I believe I have checked all the chips that were affected by oxidation. Edit: I noticed something abnormal on the...

I refer to the SMC as the chip labeled U7800. The voltages measured on the coils around the U7800 chip for the "SLPS2R" and "awake" power rails are all unstable. Here are their values: L7813: 1.8V to 0V L7814: 1.1V to 0V L7815: 1.1V to 0V L7806, L7807, L7808, L7809: 0.760V to 0V L7811...

The MacBook received liquid damage on the motherboard, causing damage to various chips. It's the 2020 model A2179 with motherboard 820-01958. Upon inspection, the CD3217 (U3100) was corroded but functional. I re-balled it to ensure its functionality. The C6962 chip was also corroded, so I...

Embarking on a journey of electronic restoration, I received a MacBook 15" model A1707, board number 820-01041-A, which had faced a formidable challenge: significant liquid damage due to an unfortunate milk spillage on its motherboard. Determined to breathe new life into this machine, I began...

To summarize the story, I tested all the pins of U3200 and U3100, and I noticed that all the incorrect diode mode measurements were directly or indirectly related to Q301 and U3500. I attempted to replace Q3501, but it didn't change anything. Then, I decided to replace U3500, and I obtained...

I stumbled upon something unusual by accident. I wanted to check if my two multimeters were providing the same reading, so I tested them on the same location. Then, I measured the same spot on another board (working board) and discovered that the diode mode measurement was different...

P_IN = 5.18 V AUX_DET = 1.2 V SMC_RST_IN = 0 VDDA = 5.10 V VDDP = 5.10 V EN_MVR = 0 V AMON = 0.004 V BMON - (i2.6 V ~ 2.7) (What do MVR, AMON, and BMON stand for?)

Understood, here's a reformulation: I'm seeing the following readings: 3V3_G3H_RTC = 0.460 PPBUS_G3H = 0.406 I've examined both the schematic and the openboarddata, and it appears that the values seem to be incorrect. How should I interpret these values, and how can I make use of them...

I am encountering this issue on the U3100 board, and it persists regardless of which USB-C connector is connected. Specifically, I am unable to obtain readings for PPBUS_G3H and 3V3_G3H_RTC.

I'm not entirely sure how to interpret the diode mode measurements, but I've been studying the schematic. I've tested every diode mode on all of the MAX98706 chips, and the readings appear to be perfect. I'm now contemplating whether the HDA Bridge (U6200) could be the issue here and whether it...

Hello,I'm reaching out to you again. No, I haven't solved yet the problem with the A1707, but why not continue on this track? I am currently working on a machine that has some oxidation. I have changed the CD3215 U3100 and repaired the PPVBAT_G3H_FUSE between Q7070 and Q7065. We're stuck at 5V...

I obtained a diode mode reading of 0.333 on TP_AUD_SPKRAMP_RESET_L pin. Tomorrow, some friends of mine will bring me a functioning board for testing diode and voltage. I'll attempt to measure as many lines as possible. I appreciate your assistance and advice.

These speakers are confirmed to be in working condition. I experimented with two sets of brand-new ones. I don't completely comprehend which parameter affects the diode mode reading's outcome yet, so I will provide a comprehensive description of the measurement procedure. I tested it with only...

There's nothing, those chips are indeed the MAX98706. I attempted to locate the datasheet. Should I consider replacing all of them?

I couldn't try with headpone but i use a external speaker (bose) Mac detect change in both way. I get correct sound in external speaker.

Thank you! I'm happy to be here. This MacBook model has four speakers, with two located on each side. Each speaker is powered by a MAX98706 chip. Therefore, in reality, what is referred to as a single speaker in this model actually consists of two separate speakers ? I'm unable to turn on the...

Hello, First of all, I'm not a native English speaker, so I'll try my best to be understood. I am a first-year electronics student eager to learn, so I bought a MacBook A1707 and tried to fix it. This MacBook had water damage. The left USB-C ports were affected by water, so I replaced them...