Re: MacBook Pro A1398 820-3787-A - Permanently Disable Discrete GPU
Hi, I´ve compared with my PDF and BRD board and I would say that in your case is the R9301.
It is the one that makes sense because it is the R that goes to de PVCC.
Regards
karmele
Member
Last Activity: 10-19-2024, 05:46 AM
Joined: 10-24-2016
Location: gasteiz,araba
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Re: Macbook A1297 Mid2010 820-2361a Magsafe schematic?
Thanks for your reply. I thought you had a 820-2565 board unmounted, tha is why I asked you about it. I apolagize.
I tried to locate the board you mentioned but so far no luck, I"ll keep looking.
Thanks anyway.
Best regards.
K...Leave a comment:
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Re: Macbook A1297 Mid2010 820-2361a Magsafe schematic?
I thought Piernov had the data I need but since he does not answer I assume I was wrong.
Please, anyone has an answer for me? I need the info ASAP.
Thanks.
I POSTED A PICTURE:
[url]https://www.badcaps.net/forum/album.php?do=editpictures&albumid=265&pictureids[/url][]=903Re: Macbook A1297 Mid2010 820-2361a ...the info ASAP.Leave a comment:
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Re: Macbook A1297 Mid2010 820-2361a Magsafe schematic?
Hi, by your reply I see that you have the 820-2565 board. Please I need some info about the value of two of the capacitors on it. As you can observe there are three capacitors, I need the value of the bigger one and the one on the middle.
Can you help?
Thanks.
K....Leave a comment:
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Hi, I have check out twice the order of the sheets, they are OK.
And yes, I´m getting now white screen but,nothing related to the order of the sheets. It must be something different.
I believe because, as I told you on the last post, I checked out voltajes on the LCD panel and on the 3 first pins I get only 2,58 V. Before I got 5V.
I´m lost it is getting worse.
Thanks....Leave a comment:
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Re: Convert monitor ccfl to led
Hi, I mentioned the gamma because you suggested it on a prior post.
I just trust on your judgment and experience.
Latest news, the last time that I measured voltajes from the LCD panel connector, the 4 first pins measured 5V and now they are 2,58
What could it be? A short? Could be the connector the problem? And the screen looks white.
Thanks....Last edited by karmele; 11-15-2018, 01:38 PM.Leave a comment:
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Re: Convert monitor ccfl to led
Hi again,
I´m attaching you the panel model and the monitor PDF manual. I hope it helps.
Thanks
Sorry the PDF does not load, I ignore why. Anyways, you have it on my first post....Last edited by karmele; 11-15-2018, 01:35 PM.Leave a comment:
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Re: Convert monitor ccfl to led
I´m attaching the gamma chip. Could you let me know what to check out?
This chip IS NT68667 and mine is NT68672, I can´t find mine data sheet.
Regards...Last edited by karmele; 11-15-2018, 11:11 AM.Leave a comment:
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Re: Convert monitor ccfl to led
Going back to the problem I have with the image, lots of brightness and little contrast, do you think it could be a gamma problem? If so, how can I confirm it? What tests should I do?
Thanks...Last edited by karmele; 11-15-2018, 11:03 AM.Leave a comment:
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Re: Convert monitor ccfl to led
Hi, they are facing towards the center of the panel.
Thanks....Leave a comment:
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Re: Convert monitor ccfl to led
Hi again and thanks for helping me,
Well, the IC is DF6113 I attached a picture. Please can you guide me about reading the spec sheet? I do not have the knowledge to do it.
Thanks again....Leave a comment:
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Re: Convert monitor ccfl to led
Hi,
I was not asking you for details about the order of the sheets, but about the leds inverter voltages.
Thanks for your help....Leave a comment:
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Re: Convert monitor ccfl to led
Hi again,
Yes, I have disassembled and assembled everything again and everything remains the same.
Thanks....Leave a comment:
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Re: Convert monitor ccfl to led
So, I undertand it is OK? Can you explain to me with more details? I thought it could have something to do with my problem.
Thanks a lot.Leave a comment:
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Re: Convert monitor ccfl to led
I have disassembled and assembled everything again and everything remains the same.
I have observed a strange thing that has puzzled me. Measuring the input and output voltages to the inverter of the LEDs, I see that through the VIN wire enter 21V and 21V get out, so far so good. Now, I measure what goes into the monitor by means of the four wires (two pairs red and white) positive and negative, and I get positive 21 V and 15V negative , the same in the two pairs. Look at the photos of the inverter so you can clarify what wires...Last edited by karmele; 11-13-2018, 06:24 PM.Leave a comment:
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Re: Convert monitor ccfl to led
No, before taking the panel apart it looked OK.
Yes, I wired the DIM to 3.5V and I am able to dim the bright and contrast but no much. There is a slight difference from 0 to 100.
I tried what you proposed me yesterday and it keeps being the same, no changes.
Someone has proposed to me to lower the tension with a resistance of 10 ohms and 5 watts. He told me that that brightness could be due to the high voltage in VIN (25V).
I will keep you posted.
Regards....Leave a comment:
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Re: Convert monitor ccfl to led
Thanks a lot. I did it....Leave a comment:
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Re: Convert monitor ccfl to led
Thanks a lot....Leave a comment:
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