Forum: General Electronics Technical Discussion
05-05-2022, 10:49 PM
|
|
Replies: 6
Views: 244
Re: Resistor value - color coding
Hello R_J
Thank you for the reply. Orange as first is the only way to have 3 in its value, when I look that way, Orange Black Gold Gold Black (3 0 N/A 0.1 250 ppm/K)
So, this seems as 3 ohm and...
|
|
Forum: General Electronics Technical Discussion
05-05-2022, 12:28 AM
|
|
Replies: 6
Views: 244
Re: Resistor value - color coding
Thank you for the reply, but how did you figure this out?
To me, according to the same table
First band is black = 0
Second is gold = N/A
Third is gold = N/A
Fourth is black, multiplier 1...
|
|
Forum: General Electronics Technical Discussion
04-29-2022, 06:17 AM
|
|
Replies: 6
Views: 244
Resistor value - color coding
Hello electronics expert,
can you please tell me what is supposed value of this resistor?
I'm really having a hard time figuring this out, because black lines on first place means 0 and gold...
|
|
Forum: General Electronics Technical Discussion
03-08-2022, 11:59 PM
|
|
Replies: 2
Views: 287
|
|
Forum: General Electronics Technical Discussion
03-08-2022, 07:28 AM
|
|
Replies: 2
Views: 287
Need help identifying a component
Hello guys,
can you please help me to identify the components shown in the attached photo,
It is written the following:
B
R030
7286S
Is it possible that this component is 0.03 ohm resistor?
|
|
Forum: General Electronics Technical Discussion
02-10-2022, 12:26 AM
|
|
Replies: 7
Views: 775
Reading resistor value by color band
Hello,
attached is a picture with two resistors. I wonder what values are based on color of the band.
I have used this as a reference:
https://www.electronics-tutorials.ws/resistor/res_2.html...
|
|
Forum: Troubleshooting Computer Displays
01-19-2022, 12:35 AM
|
|
Replies: 0
Views: 263
|
|
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
01-18-2022, 06:41 AM
|
|
Replies: 4
Views: 293
Re: Macbook Pro 2012 15" possible short on 3v3_S0
Hello Piernov,
first of all, I don't have original 85 W charger for this laptop. I use PSU with Magsafe1 cable (L style connector). However, I also have a good working battery. I tested this with...
|
|
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
01-18-2022, 02:42 AM
|
|
Replies: 4
Views: 293
Re: Macbook Pro 2012 15" possible short on 3v3_S0
Hello, just want to update and provide more information in order someone to be able to help or give some useful advice.
When injecting 3V into 3v3_S0 line, I noticed that U9220 (DP AUX, DDC, & HPD...
|
|
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
01-17-2022, 07:58 AM
|
|
Replies: 4
Views: 293
Re: Macbook Pro 2012 15" possible short on 3v3_S0
I'd like to provide a bit more information.
All 5 big coils L(7510,7520,7530, 7550, 7560) have 1.3 ohm to ground or more precise 1 ohm to ground (resistance of multimeter leads is about 0.3 ohm).
...
|
|
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
01-17-2022, 05:14 AM
|
|
Replies: 4
Views: 293
Macbook Pro 2012 15" possible short on 3v3_S0
Hello guys,
I have faulty 15" Macbook Pro 2012 with 820-3330-B motherboard with the following symptoms:
- when turned ON, there is a short increase in current to up to 0.8A (power supply unit...
|
|
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
10-27-2021, 02:16 AM
|
|
Replies: 4
Views: 664
Re: Attempt to repair AMD FirePro
Hello guys and thank you for the replies. I feel I need to add more background information.
I have two DELL workstation that work as graphics servers with these type of cards. The PCs are about 10...
|
|
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
10-12-2021, 02:17 PM
|
|
Replies: 4
Views: 664
Attempt to repair AMD FirePro
Hello guys,
inspired by this excellent tutorial made by dicky96 (this thread (https://www.badcaps.net/forum/showthread.php?t=99567)), I have decided to try to diagnose and repair faults AMD FirePro...
|
|
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
08-19-2021, 07:32 AM
|
|
Replies: 8
Views: 629
Re: 820-000165 SMC sensor issue throttling
I can confirm that this is not an issue. I've seen this on many A1466 MBAs and none of them had any issue because of that.
So, are you saying that after replacing C5125 capacitor, Memory Bank A1...
|
|
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
08-17-2021, 05:18 AM
|
|
Replies: 9
Views: 625
Re: A1466 Missing Vcore
Hello mcplslg123,
please measure:
P3V3S0_EN and check whether you have 3v3_S0.
U8030 is a switch that transfer 3v3 _S5 to 3V3_S0.
When P3V3S0_EN is 3.3V, it will "move" 3V3_S5 to 3V3_S0
|
|
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
07-17-2021, 02:43 AM
|
|
Replies: 10
Views: 3,874
Re: Lenovo T510 Fan error
Wait the sec. If you remove Q20 and short B and C, then, this part of t ecircuit will become a voltage divider. That means that FAN speed will become constant. There will be no way to control the...
|
|
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
05-31-2021, 01:36 PM
|
|
Replies: 19
Views: 1,158
Re: MacBook Air 1466 820-3437-B Dead no fan spin
mferna, thank you for the feedback.
If I understood correctly, you used HP charger with 19 V output, and original charger is 14.65V? I know that Paul Daniels uses 18V for A1466 also, but I didn't...
|
|
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
05-29-2021, 11:46 PM
|
|
Replies: 19
Views: 1,158
Re: MacBook Air 1466 820-3437-B Dead no fan spin
Hello mon2,
I don't claim I have made the same charger as original one. I also understand the difference. I'd like to know how this is unsafe, since it is connected to original PC laptop charger....
|
