MobileXT
Senior Member
Last Activity: Yesterday, 09:05 PM
Joined: 10-23-2012
Location: USA
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That’s good to know, I will concentrate on the secondary or the amp output. Thanks for the tips. -
Update: After replacement of the Q107 still have the same issue Q107 still getting hot from the infrared camera. Q106 is not shorted, I Removed Q106 and there's no reading on the diode mode drain and source. Testing D10 with Diode Mode seems like D104 is not shorted....Last edited by MobileXT; 02-08-2025, 09:52 PM.Leave a comment:
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You need to troubleshoot first the PP_3V42_G3H power rail. This power rail responsible for the green/orange light on the MagSafe charger and the SMC.Leave a comment:
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Thank you! and found that Q107 was shorted to ground. I order the replacement parts and I will update soon once I get the parts.Last edited by MobileXT; 01-23-2025, 10:31 AM.Leave a comment:
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Yamaha DXR15 Powered Speaker Fault LED On
Hello Everyone! I have a Yamaha powered speaker DXR15. The problem was the RED LED Fault indicator is steady on when I power the speaker. I did open the module and I don't see any burnt component. I Downloaded the Schematic but I don't know where to start the diagnostic. Any help would be greatly appreciated. I also attached the schematic here...
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I replaced UG800 due shorted on the ground, After replacement still have the same problem on the PPBUS_G3H Power rail pulsing from 12.35 to 10V. I removed the fuse again F5200 and F5201 and injected 13.0V on PIN2 and nothing is short. I decided to put it back the two Fuses F5200 and F5201 and pulsing for a second of and on off and on after couple restart finally I have a steady MagSafe orange light and steady PPBUS power and computer boots up. This is now FIXED. Thank you for your help.Leave a comment:
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Okay! resistance of PPVBUS_USBC5 = 36.6KΩ
Resistance to USBC5_CC1_PIN = 4.8MΩLeave a comment:
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Removed F5200 and F5201 Voltage steady @ 12.35V
Resistance to ground with without F5200 , F5201 at PIN2 = 6.90MΩ
Still no green or orange light on the MagSafe.Leave a comment:
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F5200 and F5201 resistance to ground 368kΩ
Diode Mode= .433v
PPBus_G3H = 12.34 to 10v Pulsing
PP3V3_AO = 3.3 to 0 Pulsing.Leave a comment:
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820-02100 Turn ON Turn OFF cycle
Hello Everyone, I'm new on this board 820-02100 and having a problem on the charger 5v then 19v then back to 5V again in cycles. I don't know where to start. Any help greatly appreciate. -
Look like your PPBUS_AON is shorted to ground. You need to inject voltage on ppbus I would recommend start with 1volt and look on the cpu if not getting hot. If not getting hot then you adjust the voltage to 5v then 12v.Leave a comment:
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Re: MacBook Pro 2017 A1706 820-00923 no power, low voltage PPBUS_G3H
Do you have a USB-C meter? look like you only having 5V on the DC-in. Check one of the CD3215 it could be bad or shorted.Leave a comment:
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MBP 13 820-01598 Stuck at Apple Logo
I have a MacBook Pro that replaced the DC-in flex cable connector. After replaced the connector the laptop stuck at Apple Logo. Won't boot to Option and Target Mode either. No water damage no shorted on the board. Any help would greatly appreciated. Thanks! -
MBA 13 2020 820-01958 Pulsing 5V_G3S
I have a MBA 13" 2020 820-01958 that was pulsing on 5V_G3S and P1V8_G3S power Rail. Also pulsing on the enabled PIN on U7650 PIN4. Pulsing on P5VG3S_EN R7613 PIN 1. Anybody has the same problem? any idea was causing the power rail pulsing. I don't see shorted on the board. Thanks -
Re: MacBook Air 2018 A1932 820-01521 Not turning on.
0.60Amps looks like there's a short on the board somewhere. check all the power rails one by one. If you have infrared camera make it easier to locate the shorted caps.Leave a comment:
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Re: Macbook Air A2337 Schematic & SilkScreen – 820-02016 Schematic & SilkScreen (Prov
Thank you!Leave a comment:
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Re: A12179 820-01958 Missing EDP_BKLT_EN
R0550 PIN2 = 0v...Leave a comment:
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Re: A12179 820-01958 Missing EDP_BKLT_EN
R0550 Resistance to ground @ 85.8kΩ
Diode Mode @ .528V
R0550 reading at 89.2K...Leave a comment:
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Re: A12179 820-01958 Missing EDP_BKLT_EN
Diode Mode: .529v
Resistance to ground @ ohms
85.9kΩ
Thanks!
MobileXt...Leave a comment:
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A12179 820-01958 Missing EDP_BKLT_EN
I am working an a MBA 13 2020 that has no display. The MacBook power on but no display. After Checking on the backlight I found out that the EDP_BKL_EN was missing. And this power enable was coming from the PCH. So that means this MBA board is no chance to bring it back to life? any suggestion would really appreciate. Thanks, MobileXt
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