martyjelen
Senior Member
Last Activity: Today, 09:14 PM
Joined: 03-06-2023
Location: Prague
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[B]PPBUS_G3H[/B] is 12.3V on top left port. On bottom port there is 0V. (it goess from 5V to zero after 2 seconds.) Could it be problem with CD3217?[B]PPBUS_G3H[/B] is 12.3V on top left port. On bottom port there is 0V. (it goess from 5V to zero after 2 seconds.) Could it be problem with CD3217? -
I tried to rewrite ROM, but it's still the same. No DFU.Leave a comment:
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Ok. Thank you very much. Maybe there is some difference between [B]820-01700-05 and 820-01700-A [/B](mine PCB).Ok. Thank you very much. Maybe there is some difference between [B]820-01700-05 and 820-01700-A [/B](mine PCB).Ok. Thank you very much. Maybe there is some difference between [B]820-01700-05 and 820-01700-A [/B](mine PCB).Leave a comment:
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Hello, finnaly I found a way to read T2 ROM dump. ROM from my dead PCB has 16MB but when I downloaded a ROM from forum it has only 4MB... Could you tell me what could be wrong? This dump also has the same size 4MB
[url]https://boards.rossmanngroup.com/threads/a2141-820-01700-05-no-power.63469/[/url]https://Hello, finnaly I found a way...00-05-no-powerLeave a comment:
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Unfortunately, this cannot be used with BeeProg that I have. One question before I'll look for other programmer. After you rewrite T2 ROM dump is there "revive" option? Or only "restore" option. I mean data is really important.Leave a comment:
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I tried it. It doesn¨t detect in DFU. I tried both left ports.Leave a comment:
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Mabook is not in DFU. Is this method working for A2141 ?
"Press the power button for about half a second, then also press and hold Left Control + Left Option + Right Shift for 10 seconds, then release all keys except power and hold power until the Target Mac shows up in Apple Configurator on the Host Mac"Leave a comment:
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[B]R7652[/B] - 0V on both sides
[B]R7691[/B] - 0V on both sides
pin29 on U7650 is PP5V_S5_LDO - 2.5V
pin22 on U7650 is P5VP3V3_VREG3 - 3.3V
did you mean these ?[B]R7652[/B] - 0V on both sides
[B]R7691[/B] - 0V on both sides
pin29 on U7650 is PP5V_S5_LDO - 2.5V
pin22 on U7650 is P5VP3V3_VREG3 - 3.3V
did you mean these ?[B]R7652[/B] - 0V on both sides
[B]R7691[/B] - 0V on both sides
pin29 on U7650 is PP5V_S5_LDO - 2.5V
pin22 on U7650 is P5VP3V3_VREG3 - 3.3V
did you mean these ?[B]R7652[/B]Leave a comment:
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[B]P5V_3V3G3H_EN[/B] -50kΩ
[B]P5VG3S_EN[/B] - 50kΩ[B]P5V_3V3G3H_EN[/B] -50kΩ
[B]P5VG3S_EN[/B] - 50kΩ[B]P5V_3V3G3H_EN[/B] -50kΩ
[B]P5VG3S_EN[/B] - 50kΩ[B]P5V_3V3G3H_EN[/B] -50kΩ
[B]P5VG3S_EN[/B] - 50kΩLeave a comment:
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C6525 was cracked. I removed it and now we are back. [URL="https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/3629655-apple-macbook-pro-16-inch-2019-a2141-stuck-at-5v?p=3652852#post3652852"]#45[/URL]
Yesterday, 08:38 AM
C6525 was cracked. I removed it and now we are back. [URL="https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/3629655-apple-macbook-pro-16-inch-2019-a2141-stuck-at-5v?p=3652852#post3652852"]#45[/URL]Last edited by martyjelen; 06-06-2025, 07:03 AM.Leave a comment:
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Pin no. 2 on both F7000 +F7001 is shorted.Leave a comment:
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0V 0ΩLeave a comment:
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I removed both fuses. PPBUS_G3H is shorted to groundLeave a comment:
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It seems the board definitely died. Suddenly the current draw drops to zero. Now PPBUS_G3H is missing....Leave a comment:
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I can confirm that [B]P5V_3V3G3H_EN[/B] is 0V. [B]P5VG3S_EN[/B] is also 0V.I can confirm that [B]P5V_3V3G3H_EN[/B] is 0V. [B]P5VG3S_EN[/B] is also 0V.I can confirm that [B]P5V_3V3G3H_EN[/B] is 0V. [B]P5VG3S_EN[/B] is also 0V.I can confirm that [B]P5V_3V3G3H_EN[/B] is 0V. [B]P5VG3S_EN[/B] is also 0V.I can confirm that [B]P5V_3V3G3H_EN[/B] is 0V. [B]P5VG3S_EN[/B] is also 0V.Leave a comment:
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I think I don't understand. Should I measure voltage or not?Leave a comment:
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UR600. I think it's speaker amplifierLeave a comment:
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Yes. 1.1V, stable.Leave a comment:
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