kartal
Member
Last Activity: 04-22-2025, 09:06 AM
Joined: 05-27-2019
Location: estanbul
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Hello. Did you find brd and schematic? -
[B]these voltages exist.
PP3V3_S5[/B] : 3.3v
[B]ALL_SYS_PWRGD_R[/B] : 1.8v[B]these voltages exist.
PP3V3_S5[/B] : 3.3v
[B]ALL_SYS_PWRGD_R[/B] : 1.8v[B]these voltages exist.
PP3V3_S5[/B] : 3.3v
[B]ALL_SYS_PWRGD_R[/B] : 1.8v[B]these voltages exist.
PP3V3_S5[/B] : 3.3v
[B]ALL_SYS_PWRGD_R[/B] : 1.8vLeave a comment:
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while there is power . I measured both sides.
R7766 .
1 no : 0.5v
2 no : 0v
when all power is off .
1 no : 0
2 no : gnd 0.5
C7777 . PP3V3_S5 = 3.3V ( After a while 3.3v disappears )
Resistance 47k seems correct.Last edited by kartal; 12-08-2023, 02:50 AM.Leave a comment:
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Thank you for the link. I made the measurements and the following PPVCCEDRAMS0_EN_FILT_BUF signal is missing. When the device came to me, the screen was defective. I tried the working screen, but it turns off.
PP0v95_S0_CPUVCCIO_REG_R : 0.97v
PVCCIO_EN : 3.3v
PPVCCEDRAMS0_EN_FILT_BUF : 0vLeave a comment:
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Macbook pro A2289 820-01987-A
Hello. I have one A2289 (820-01987-A) device. The Apple logo appears and the device resets. I connected it to an external display and disabled the socket of its own display. When I press the ALT key, the disc symbol appears, it does not reset or shut down, but the system does not start up in any way, when I make a selection, the password screen does not appear on the black screen. When I connect the system disc from the external display to the external display, when I make a selection to set up the system, it stays on the black screen after a while. the device turns off. There was a trace on the... -
Re: 820-02773-A schematic BRD help
Thank YouLeave a comment:
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Re: 820-01700-A macbook pro
battery is not original apple but same quality battery. The device worked flawlessly for 1 day after the battery was changed. The next day, when they turned on the device, the keyboard + touchbar + speaker sound did not work. The device is charging, it works with both the adapter and the battery, but these 3 hardware do not have voltages, I can't see any problem, I can't see any physical problem. There is no broken piece on the motherboard. I tried with another battery, same result. This is the first time I have encountered such...Leave a comment:
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Re: 820-01700-A macbook pro
now i can see both voltages are available. The device was brought to me from another service, the battery was changed, the battery is not the original apple, but it is a quality battery. It worked flawlessly for 1 day. After 1 day, when they turned on the device, the keyboard, touchbar and sound did not work. I have examined the motherboard a lot, there is no liquid contact or broken parts. voltages seem fine. The device is charging, it opens with both the cable and the battery. There is no problem in its operation, but these 3 hardware...Leave a comment:
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Re: 820-01700-A macbook pro
so where could the problem be in 3 hardware disabled device.Leave a comment:
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Re: 820-01700-A macbook pro
R5221 resistor shows 1 input 1.8v 2 no 1.7v. with the battery installed. the battery is charging, the device turns on, but still the keyboard + touchbar + speaker is not active. There is sound in the headphone output. these 3 hardware is not working .PPVBAT_G3H_CONN voltage 12v available....Last edited by kartal; 04-26-2023, 07:24 AM.Leave a comment:
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Re: 820-01700-A macbook pro
battery is new 2 tried but the result did not change the same 3 hardware unfortunately does not work.Leave a comment:
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Re: 820-01700-A macbook pro
J6951
1 - 0v
2 - 1.7v
3 - 1.7v
4 - 0v
5 - 0v
6 - 0v
U6950 diode has been changed but the same problem still persists.Last edited by kartal; 04-25-2023, 03:17 AM.Leave a comment:
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Re: 820-01700-A macbook pro
It was tested for 1 day after the battery was changed, everything was working, but after turning on the device today, these 3 hardware are not working.Last edited by kartal; 04-25-2023, 02:07 AM.Leave a comment:
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820-01700-A macbook pro
Hello. I have one 820-01700-A macbook pro. device was working battery changed Tested for 1 day no problem today when I turn on the device the keyboard + touchbar + speaker does not work, I reinstalled the software, but the result is the same. Headphones have sound but no sound out. the keyboard has backlight but the keyboard is not working the touchbar is not working. No liquid damage on the motherboard. R5103 1.8v available. keyboard J6701 socket 1 no standing 1.8v available. what missing voltage might have affected these 3 hardware? -
Re: 820-01236-06
Thank you very much.Leave a comment:
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820-02773-A schematic BRD help
Hello. I have one 820-02773-A macbook pro with liquid contact some ways are broken. I couldn't find the schematic and table view. Does anyone have the schematic and brd file of this model? -
Re: Macbook pro 1990 help
Yes, the problem is the screen. I have now repaired the bottom board of the screen and it is working properly. Thank you for your support my friend.Leave a comment:
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Re: Macbook pro 1990 help
Hi . The problem is in the lcd board. the motherboard was tested with another display and the motherboard is OK. At the end of the installation with the screen on the motherboard, when the motherboard recognizes the screen, the screen turns itself off. When I open and close the lid, the screen comes on and goes out again. In the card section under the lcd, which integrated do you think is causing this problem?Leave a comment:
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