Re: MBA A1466 2017 820-00165 Green ok, no power FAN not spinning
Hi,
Thanks for advice.
Since PM_SLP_S5_L was stucked to 0v, no way to go further in power sequence.
Once R8115 was removed, i confirm that PM_SLP_S5 was forced to 0v by U0500. So, i directly connect PM_PWRBTN_L to R8115 Pin2 Pad => S4 conditions was granted and associated VR rise up. Following situation was : PM_SLP_S3_L stucked at 0v. I didn't want to play more with PCH output by-pass.
so i have some doubts about PCH health.
Electron67
New Member
Last Activity: 04-16-2025, 04:29 AM
Joined: 10-31-2021
Location: Suresnes
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Re: MBA A1466 2017 820-00165 Green ok, no power FAN not spinning
Hi,
U1950 Pin1 : stuck at 0v, no pulsing.
R8162 : 0v on both side,
I'll dig with S5/3 rails connections and 3v3_SUS in same way.
RTC output has a strange shape (scope view), output level is not stable, sometimes, 2 voltage levels occur during Ton (stair step).Leave a comment:
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Re: MBA A1466 2017 820-00165 Green ok, no power FAN not spinning
Hi,
Ok, thanks.
Pin2 : 0.128v on U1950 pad, 0.086v on R1950;
Pin8 : 3.4v on U1950 pad; same on C1950;
Pin1 : 0v on pad & R8166.Leave a comment:
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Re: MBA A1466 2017 820-00165 Green ok, no power FAN not spinning
Power adapter is a geniune one.
On U1950 => Pin2=0.074v; Pin8=3.42vLeave a comment:
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Re: MBA A1466 2017 820-00165 Green ok, no power FAN not spinning
Hi,
Board is in a very good condition, no liquid damage or corrosion.
PM_SLP_S4_L=0v but the lane is not grounded.
R measurement after L7630 gives ~218Ohms (0.217v in diode mode).
A precision i previously forget to mention : When i connect the battery, PM_BATLOW_L goes up to 3.3V but PM_SLP_S4 remains to 0v.Leave a comment:
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Re: MBA A1466 2017 820-00165 Green ok, no power FAN not spinning
Hi mon2,
Thanks for reply.
PPBUS_G3H = 8.5vLeave a comment:
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MBA A1466 2017 820-00165 Green ok, no power FAN not spinning
Hi,
Since a couple a days, i try to fix 820-00165 Mobo, without success for the moment.
Measures :
1. PVRTC_G3H = 3.33v
2. RTC_RESET_L = 3.3v
3. PCH_SRTCRST_L = 3.3v
4. PCH_INTVRMEN = 2.58v
4.1 PCH_INTRUDER_L = 2.50v
5. PCH_DSWVRMEN = 2.50v
6. SYSCLK_CLK32K_RTCX1 = 0.44v
7. PP3V3_S5 = 3.3v
7.1 PP1V8_S3 = 0v (EN pin 0v)
8. PM_DSW_PWRGD = 3.4v
9. PP3V3_SUS = 3.3v
10. PM_BATLOW_L = 0.035v (3.3v battery pluged but still no power)
11. PM_RSMRST_L = 3.04v
12. PM_PWRBTN_L = 3.4v ; SMC_ADAPTER_EN... -
Re: New Members - please post your introductions here
Hello,
New to the forum, let me introduce myself. I'm french, electronics engineer and a motherboard repair enthusiast. I live in Paris region where I also did all my studies and my professional career. This forum brings a lot of information, I hope to be able to contribute to it too.Leave a comment:
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