Everyone has to build their own reflow profile based on their geographic location. My desert dwelling profile might now work well for someone in a high humidity location.
I can give you a couple of my lead free profiles. The very first thing you need to do is bake the board to remove any moisture in it. 100C for 24-48 hours is recommended. If you have moisture in the chip or board is will cause delamination. The higher your normal humidity the longer you want to bake the board for.
Pb Free without IHS (200-210 bottom heater)
R1 1.0 L1 90 D1 80
R2 1.0 L2 150...
Thank you to the guys at HEGE supporting Badcaps [ HEGE ] [ HEGE DEX Chart ]
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Sorry im a dodo that was a inductor.
Since im asking dumb questions I have one more. Can I not test the battery from the p+ and P-? It shows 0.0V and is out of the laptop
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Microsoft Surface Laptop 1868 short
Is there a schematic anywhere so I can find the value of the capacitor circled blue in the first picture? There are no more shorts in this area after removing it but still no voltage anywhere on the board.
I had to replace the battery since it was leaking acid near the bottom. With the old battery it was drawing 0.03A but with the new one its 0.00A
Thanks for any help...
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Everything is back together but the cassette wont play. Pin 5 of IC701 is 5.3V and drops to 0 when pressing the play button. Pin 14 stays at 0.03V when pressing play. None of the buttons work. Is IC701 bad? pin 18 is 5.3V...
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Disc caps
Can I replace a ceramic disc cap with a multilayer ceramic cap? I cant even find .047 uf disc caps at digikey, mouser or newark. The places I do find them want anywhere from 25c to $3 each, at any quantity, plus shipping....
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I didnt think I d find the schematic for it. According to the parts list its a HZ12B1 or a 12.9V max zener diode.
Can I replace the ceramic disc caps with multilayer ceramic caps?Last edited by m4a2t0t; 01-18-2024, 10:04 PM.
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JVC RC-M90W Boombox component ID
What kind of diode is D72 next to the fusible resistor? It looks like D723 but it blew up and all I can read from it is a 1 on one side and what appears to be an E or F on the other..
Someone replaced a 5ohm fusible resistor with a 1w 5ohm resistor to get it working. It worked for an hour before it started smelling like burning plastic.
Is the disc cap in the last pic just a ceramic cap?4 Photos
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Xbox Series S SSD
Is it possible to replace the internal SSD in the Series X|S? The SSD is dead and I cant extract the boot partition. Can I use a donor partition?
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Sony Bravia 75X850C panel
After changing out the backlights I have a single green vertical line on the left side of the screen. Is there any way to fix it? I tried putting pressure on all the tabs and on the top of the panel but neither helped.
Does Sony epoxy all their panels or just the expensive ones?1 Photo
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eMMC programmer
What tool do you recommend? Is the T56 good enough or should I get something else. I saw that EFI programmer but it was pretty pricey compared to the T56 and it didnt even have any adapters. I have a T48 but Im not seeing any emmc adapter for it.
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After some more digging I found out that the circle on the screen was actually the reset screen it just didnt show the text. Anyways, I left it on that screen with the USB plugged in and when I came back to it an hour later it was said the update finished. It now works properly. Thanks
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Sorry about the delay in responding. I ordered a WORKING BM1 board and the unit now powers on, the problem is that it turns on by itself and then power cycles every 20 seconds. Backlights are on, the TV is displaying the sony logo then it reboots. I cannot turn it off. I tried updating the firmware but nothing is happening. This board come from and identical model. Is this a firmware issue or do I have another problem?
EDIT: Should I even attempt a firmware update when its power cycling?
[B]WARNING: During the software installation process, please do not:[/B][LIST][*]Remove...Last edited by m4a2t0t; 11-28-2023, 04:40 PM.
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Re: Sony Bravia XBR-75X850D
I unplugged the DPS board and injected 3.3 into the connector on the G1 board to its left. Was I supposed to do it between the DPS and BM1 board? The bl_on and pwr_on signals come through each flex cable on that side.
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Re: TCL 65S421 No Backlight
It looks like LED2 is bad. The tester stays at 330v when I probe the pins. Thanks
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Re: Sony Bravia XBR-75X850D
Heres a picture of all 4 boards...
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Re: Sony Bravia XBR-75X850D
The main board only connects to the G1 power board. I thought you meant to remove the BL connectors from the GL2 power board (backlight board). I just removed the connector from the main board and jumpered the wires while both power boards were connected to each other.
I see nothing visibly wrong with anything on either power board. The TCON does get 12V and its present on both sides of the fuse.
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TCL 65S421 No Backlight
I can see an image on the screen with a flashlight. Is P_ON at 2.6v acceptable or does it need to be 3.3?
Main Connector
1- 3.3 - BL_ON
2- 3.3 - P-DIM
3- 2.6 - P_ON
4- 0 - GND
5- 2.6 - A_DIM
6- 0 - NC
7- 0 - GND
8- 0 - GND
9- 12 - 12v
10- 12 - 12v
11- 12 - 12v
12- 12 - 12v
13- 0 - 3D_EN
14- 12 - 12v
I see no voltage on either side of TS2 or TS3. Is something else causing U601 to not drive TS3?
U601(OZ9976GN)
1-...
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Re: Sony Bravia XBR-75X850D
I tried with it disconnected and the BL board still turns on
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