Re: Mack book pro A1707 lcd problem
Hallo,
Is this a flexgate problem
See video...
vinifera
Vinifera
Last Activity: 02-19-2023, 05:27 AM
Joined: 08-17-2018
Location: Dilbeek
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Re: Macbook Air 820-3437B missing PP3V3_S5
PP3V3S5_EN_R is high = 3,425V
Resistance between Pin16 and Pin2 from L7560 = 19,57k
R7563 10 ohm must be 10 ohm
R7561 9,25K must be 10K
R7560 18,11K must be 23,2K
Pin2 L7576 in ohm to ground = 3K
All those measures are taking with L7560 on the board
KrLeave a comment:
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Re: Macbook Air 820-3437B missing PP3V3_S5
I have the same board and i measure 0,52V on PP3V3S5_EN_R?
When i remove L7560 then i measure 2,78V ?
No short on PP3V3S5_EN_R.
Can someone help me ?...Leave a comment:
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Re: Macbook Air 820-3437B missing PP3V3_S5
Hi all i have a a1466 and i have PP3V3S5_EN_R = 0,52V ?Leave a comment:
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4-terminal current sense resistors
Can you replace a 4-terminal current sense resistor by a 2-terminal current sense resistor without lose of functionality ? -
Re: Macbook Pro 15" 820-2850-A No Power
thx TerenceLeave a comment:
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Re: Altec PC410 (BGA Rework) to communicate with PC
Hi Pronester,
i have the same problem and my connection is via RS232 to USB ?
have you found the solution ?
Can you give me feedback
thxLeave a comment:
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Re: Macbook Pro 15" 820-2850-A No Power
Macbook Pro i5 820-2850-A (2.4G)
Hi, i bought a defect motherboard and i'm not sure that the following components must be on the motherboard ? C5369 R5371 C5318 U5313 U5323 U5101 C5101 U3301 C3302 U3300 R3940 ? Can somebody help me ?Leave a comment:
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Re: New Software Achi LY by PSOFT
Jasko
I have the same issue for the connection , but i changed also thet databit to 7 , but it doesn't work. My PC recognize the port ?
Can you help meLeave a comment:
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Re: problem with an ipad4
i think that PPVCC_MAIN has to be stable before going further ?Leave a comment:
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Re: problem with an ipad4
i bought on e-bay a defect ipad (no backlight) and i see the apple logo on / off but not possible to put in recovery mode by i-tunes error 4005
The PCB looks fine , and i think i made a short by measuring , because before PPVV_main was stable on 3,75 VLeave a comment:
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problem with an ipad4
hi,
I have also a problem with an ipad4
PPVCC_main is going between 0,056V and 3,35V
what can be the problem ?
when i measure a short on this line i have 0,170 in diode mode ?
can somebody help me -
Re: A1286 2,2ghz late 2011 fans spin on / off for 1s
ok thanksLeave a comment:
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Re: A1286 2,2ghz late 2011 fans spin on / off for 1s
i would go for option B, but is the bga rework station IR6500 good herefore ?Leave a comment:
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Re: A1286 2,2ghz late 2011 fans spin on / off for 1s
i heat it arround 250°C about more then 10 minutesLeave a comment:
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Re: A1286 2,2ghz late 2011 fans spin on / off for 1s
Which device did I have to use for this? Unfortunately it happened and now I'm looking for a bga rework station? Can you recommend me something?Leave a comment:
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Re: A1286 2,2ghz late 2011 fans spin on / off for 1s
Reflow with the YIHUA 852D++ modelLeave a comment:
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Re: A1286 2,2ghz late 2011 fans spin on / off for 1s
Is replacing the GPU a solution? And which equipment is best used for this? Does anyone have experience with this? Do you sometimes have some references of equipment and what is the best price quality for hobby?Leave a comment:
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Re: A1286 2,2ghz late 2011 fans spin on / off for 1s
In short i have 0 ohm
Yes i reflowed the GPU
I was part of the reflowing a sound. It seemed like a sound that a component was blown up. But visually I didn't find a broken component ?Leave a comment:
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A1286 2,2ghz late 2011 fans spin on / off for 1s
Hi,
There's a short circuit on PPVCORE_S0.
See attached in red, which components I have removed and I still have a short circuit on PPVCORE_S0.
So the short is in the line from R8940 (see appendix 2).
or in the GPU chip or in one of the capacitors (see appendix 3).
The question now is how can I find the capacitor that could be broken ? A separate power supply of 0.9V on PPVCORE_S0 with an adjustable current ? Is this a good idea ? and then measure the temperature of each capacitor ? Does anyone have experience with this ? What equipment do you use for...
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