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Badcaps Capacitor & Electronics Repair Forum

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Topics: 45 Posts: 733

Last Post: What's the ideal operating temp for capacitors?

733

What's the ideal operating temp for capacitors?

by Thermaltake

04-16-2024, 04:04 AM

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Site announcements, capacitor-related news, and anything relavant you might think of... Got News? POST IT!!

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Last Post: New Members - please post your introductions here

235

42,501

New Members - please post your introductions here

by Péter Fodor

Today, 10:00 PM

Document & Software Archive

Common Parts Library - Datasheets

Share or download datasheets or application notes for electronic components and other parts. Contribute your knowledge or ask questions. Before using please read our Terms of Service.

Topics: 2 Posts: 5

Last Post: ncp81208 datasheet

ncp81208 datasheet

by BAKEEL1990

05-01-2024, 05:24 AM

General Topics

General Capacitor Questions & Issues

Questions and answers for identifying whether your device has bad capacitors. Also post general capacitor-related questions and issues here.

Topics: 3,195 Posts: 32,739

Last Post: How can I test non-polarized capacitor?

3,195

32,739

How can I test non-polarized capacitor?

by chth96

Today, 09:01 PM

General Computer & Tech Discussion

Have just a general computer question, post it here. This can be anything from an OS issue, hardware issue not related to capacitors, upgrade question, or whatever basic tech-related issue is on your mind.... This is also a good place to share your tech projects!

Topics: 4,507 Posts: 74,893

Last Post: Copy-protected DVDs

4,507

74,893

Copy-protected DVDs

by stj

Today, 05:21 AM

Troubleshooting Hardware & Devices and Electronics Theory

General Electronics Technical Discussion

If you have a general question concerning basic electronics theory or component function & usage, here's where it goes.

Topics: 3,995 Posts: 44,529

Last Post: Help with LCD pinouts

3,995

44,529

Help with LCD pinouts

by maleksa

Today, 08:27 PM

Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

Technical discussions covering any type of desktop motherboard, video/graphics card, controller card, or whatever other desktop peripheral you need help with. Any and all brands and models welcome. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!

Topics: 6,896 Posts: 37,720

Last Post: boardview/schematics for MSI Z690-A PRO (MS-7D25)

6,896

37,720

boardview/schematics for MSI Z690-A PRO (MS-7D25)

by topway

Today, 09:21 PM

Sub-Forums:

BIOS & Schematic Requests! (2,726/16,554)

Troubleshooting & Designing Networks

Post your computer network questions, ideas, gripes, and so on in here. This can be any type of network, whether its cabled, wireless, or whatever. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!

Topics: 502 Posts: 5,457

Last Post: 4G LTE router sim socket replacement

502

5,457

4G LTE router sim socket replacement

by mrsdsdsdsd

Yesterday, 02:28 PM

Troubleshooting Laptops, Tablets, and Mobile Devices

Technical discussions covering any type of laptop, notebook, netbook, tablet, or smartphone. Any and all brands and models welcome. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!

Topics: 32,277 Posts: 308,753

Last Post: LA-G871P Rev. 1.0 (Dell Latitude 7400) Hi res Scans, BRD & PDF Schematic

32,277

308,753

LA-G871P Rev. 1.0 (Dell Latitude 7400) Hi res Scans, BRD & PDF Schematic

by Deby

Today, 03:11 PM

Sub-Forums:

BIOS Requests ONLY! (12,867/156,119)

Schematic Requests ONLY! (4,819/28,878)

Troubleshooting Computer Displays

Technical discussions covering any type of PC/computer display, whether it be CRT, LCD, or anything else. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!

Topics: 5,332 Posts: 75,746

Last Post: Dell U3011 no display after a few minutes

5,332

75,746

Dell U3011 no display after a few minutes

by Andre_

Yesterday, 02:27 AM

Troubleshooting TVs and Video Sources

Technical questions about your defective television, projection screen, LCD/plasma, or any other type of video device. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!

Topics: 27,506 Posts: 375,310

Last Post: Rca RWOSU7047 No Picture

27,506

375,310

Rca RWOSU7047 No Picture

by EazyBone

Today, 08:11 AM

Troubleshooting Power Supplies and Power Supply Design

Technical discussion for power supplies. This covers PC supplies, and any other related power supply issue. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!

Topics: 4,196 Posts: 65,353

Last Post: Omega MML200 Coutant Lambda PSU repair

4,196

65,353

Omega MML200 Coutant Lambda PSU repair

by Crystaleyes

Today, 07:08 PM

Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices

Technical questions about your defective laser or ink printer, plotter, copier, scanner, and other imaging & printing devices. This section also includes digital cameras. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!

Topics: 306 Posts: 1,688

Last Post: Bios Canon mg 6853

306

1,688

Bios Canon mg 6853

by tuan nguyen

Today, 06:43 PM

Troubleshooting Audio Equipment

Technical discussion on audio equipment troubleshooting and installation. This can be anything from a home/car stereo, guitar amp, and so on. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!

Topics: 2,343 Posts: 27,607

Last Post: Carlsbro Cobra 90 Lead - Reverb pot acting like a volume pot

2,343

27,607

Carlsbro Cobra 90 Lead - Reverb pot acting like a volume pot

by sleizen

Today, 04:58 PM

Troubleshooting Appliances and other Household Electronic Stuff

Technical discussion on household appliances & other household electrics & electronics; including troubleshooting and installation. This can be anything from a washer/dryer, dishwasher, microwave oven, other sordid kitchen electrics and so on. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!

Topics: 227 Posts: 3,940

Last Post: Xiaomi Roidmi EVE Pro battery died!

227

3,940

Xiaomi Roidmi EVE Pro battery died!

by Amironox

05-28-2024, 09:47 AM

Troubleshooting Game Consoles & Other Weird Devices

This can be anything from game consoles to arcade games to anything else that doesn't really fit into any of the above categories. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!

Topics: 1,021 Posts: 10,971

Last Post: Hilti Battery B22 4.0 blink green but not responding

1,021

10,971

Hilti Battery B22 4.0 blink green but not responding

by bohaboha

Today, 08:13 PM

Equipment Usage, Soldering, Techniques, and Reviews

Technical discussions concerning soldering techniques, usage of test equipment, how it works, what's best, and some pointers in using it all.

Topics: 1,382 Posts: 19,499

Last Post: Making a Handskit hot air station a bit less stupid

1,382

19,499

Making a Handskit hot air station a bit less stupid

by stj

Yesterday, 01:58 PM

Mark Channels Read

Identify Component (Mosfet?) from Lenovo Battery

by Clarify4082

Hi,

I´ve a replacement Lenovo Battery with liquid damage

The component (I believe) a Mosfet is gone and I can´t find anything online. The marking is: 3108H1 D54FHJ
Please find the pictures attached.

Thanks [ATTACH=JSON]{"alt":"Click image for larger version Name:\tlenovo_battery.png Views:\t0 Size:\t1.27 MB ID:\t3283440","data-align":"none","data-attachmentid":"3283440","data-size":"custom","height":"525","width":"802"}[/ATTACH]...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
Today, 02:49 PM
Disable faulty soldered RAM on Acer A315-22

by mat2k

Hello, I've been googling for some pointers on this but couldn't find anything that applies to this board. I have an Acer A315-22 (board NB8607) with faulty RAM between 142 and 174mb. I just wanted to disable the onboard RAM altogether, but this one doesn't seem to have any memory down ID resistors or strap in order to disable it. I'm attaching the schematic I found, the boardview for it also seems to be available somewhere in this forum but I still don't have a use for it lol.
How would I disable the RAM on this PC? Thanks for the help.

[B][MOD EDIT] LINK to boardview + schematic[/B]...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
Yesterday, 11:26 AM
ASUS Zenbook Flip 15 bios file please

by chinh

Who has bios ASUS Zenbook Flip 15
UX562UG_IO
R2.0
air raid status...
- Channel: BIOS Requests ONLY!
Today, 09:45 PM
How can I test non-polarized capacitor?

by chth96

I desoldered samwha NF capacitor(50v 5.6uf) from PCB circuit of 29inch CRT TV which have symptoms of no display after I heard sound of inrush of current to TV whenever I switch on this television.
I measured ESR value of this non-polarized capacitor(samwha NF capacitor 50v 5.6uf) by means of MESR-100 ESR meter and It displayed 0.3 ohm

And When I measured its capacitance with digital multimeter and LCR-T4 Mega328 meter, It displayed 10uf from DMM and 8uf from LCR-T4 meter.
I found catalogue of samwha capacitor(samwha-catalogue_3.pdf file), which is attached to this thread,...
- Channel: General Capacitor Questions & Issues
Yesterday, 07:31 PM
Help with LCD pinouts

by maleksa

The LCD screen on my Roland Fantom XR rack synthesizer has gone blank. I managed to get the schematics for the connection to the LCD.

The standard LCD has D0 to D7 pinouts (in addition to the normal VDD, VSS, CS, RES, RW, EN etc).

Can someone help me to identify what V1 to VR is for? Also how does VR work?

Any help is truly much appreciated....
- Channel: General Electronics Technical Discussion
Today, 08:27 PM
Acer One 10 - N15P2

by Davi.p

Acer One 10 / N15P2 / S1002, MB=T10IBT1_MB_V30_0508C
found in the trashbin

initial state: Windows 10 loading until begin photo + time display, touchscreen/keyboard/trackpad no response, restart in recovery by F2 key showed a working kb and touchscreen

second state: after a card wash in warm water, drying with heat gun but forgot to remove bottom plastic foil glued on it, fed power, no sign of life apart power led and charge led lit still, after found slight moisture under that foil (grrrr, sgrunt), no more power 1,8v on the bios flash, rarely found 1,8v on the cap...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
06-01-2024, 01:59 PM
Hilti Battery B22 4.0 blink green but not responding

by bohaboha

The HILTI CPC battery flashes green but no tool starts or works. when testing the battery has 19.2v what could be the problem with them because I have three similar ones but there is nothing written on them all the patches are removed in the first B22 /4.0 with 19.2v the second one B22 /5.2 with 21.8v the third B22 /4.0 with18.3v are all three destroyed ? a bit difficult to believe have also tried other Hilti tools the same thing if someone who can help very grateful...
- Channel: Troubleshooting Game Consoles & Other Weird Devices
Today, 08:05 AM
Sony XBR-52LX900 BL_ERR

by Nicktronic

Hi all, just curious if the BL_ERR signal is active high or low? TV has the 6 blink error code and I've changed the backlights as they tested questionable (4 strips tested - 203VDC, 203VDC, 203VDC and 175VDC). The new strips all tested at 175VDC. Now when I turn it on, it tries twice to come up and then the 6 blink code. During the this time the BL_ERR pin is high and drops low momentarily, then does it again on the 2nd try to boot (so Im assuming active low). The other thing is the backlight voltage ramps to ~280VDC from around ~160VDC and then back down as the TV tries to boot again. Does...
- Channel: Troubleshooting TVs and Video Sources
Today, 07:30 PM
Omega MML200 Coutant Lambda PSU repair

by Crystaleyes

Hi all.

Recently I picked up a vintage HP 37717B communications analyzer which uses one of these MML200 Coutant power supplies. Needless to say the PSU is not working, and surprisingly there is apparently nothing available on the web regarding repairing one of these. No stories, no schematics, zilch!
There[I] are [/I]however many companies offering repair 'services', however I don't have the luxury of sending it off, so am intending to do the repair myself.

I admit right now that I am no expert on smps repair, although I do have a grasp on the principle of the general...

5 Photos
- Channel: Troubleshooting Power Supplies and Power Supply Design
05-29-2024, 08:23 PM
Bios Canon mg 6853

by Santana26

i, need dump of printer canon pixma 6853
QM7-4414

1 Photo
- Channel: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices
Today, 03:33 AM

Help with Lenovo ThinkPad P52 Bios

by Minz

Hi,

I have a bricked ThinkPad P52, has no display nothing. Just happened to be in this situation after a failed bios update. Could anyone please get the rom file? I just ordered the ch341a programmer for the first time so if anyone can help me that would be much appreciated.

Type 20m9-000kus
S/n pf-1ldn07 19/02

Thanks
- Channel: BIOS Requests ONLY!
Today, 05:34 PM
ASUS Zenbook Flip 15 bios file please

by chinh

Who has bios ASUS Zenbook Flip 15
UX562UG_IO
R2.0
air raid status...
- Channel: BIOS Requests ONLY!
Today, 09:45 PM
Help with LCD pinouts

by maleksa

The LCD screen on my Roland Fantom XR rack synthesizer has gone blank. I managed to get the schematics for the connection to the LCD.

The standard LCD has D0 to D7 pinouts (in addition to the normal VDD, VSS, CS, RES, RW, EN etc).

Can someone help me to identify what V1 to VR is for? Also how does VR work?

Any help is truly much appreciated....
- Channel: General Electronics Technical Discussion
Today, 08:27 PM
Identify Component (Mosfet?) from Lenovo Battery

by Clarify4082

Hi,

I´ve a replacement Lenovo Battery with liquid damage

The component (I believe) a Mosfet is gone and I can´t find anything online. The marking is: 3108H1 D54FHJ
Please find the pictures attached.

Thanks [ATTACH=JSON]{"alt":"Click image for larger version Name:\tlenovo_battery.png Views:\t0 Size:\t1.27 MB ID:\t3283440","data-align":"none","data-attachmentid":"3283440","data-size":"custom","height":"525","width":"802"}[/ATTACH]...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
Today, 02:49 PM
Pioneer PN50951-22U Backlight On, No Image

by x_orange90_x

I get backlights that stay on not there is no image. The tv does not automatically power on when plugged in either which I generally see happen when there is a fault. It responds as it should to the power button.

I checked the test points on the TCON and I have proper voltages except for at 1P15V. I don't know if that is supposed to be 15V or 5V, but either way I only get 1.134V on that point. I have 12V, 8V, VCC, and a small amount on the CKV point.

I tried heating up the SoC on the main board but that made no difference. Disconnecting either ribbon from the TCON also...
- Channel: Troubleshooting TVs and Video Sources
06-01-2024, 08:55 PM
Sony XBR-52LX900 BL_ERR

by Nicktronic

Hi all, just curious if the BL_ERR signal is active high or low? TV has the 6 blink error code and I've changed the backlights as they tested questionable (4 strips tested - 203VDC, 203VDC, 203VDC and 175VDC). The new strips all tested at 175VDC. Now when I turn it on, it tries twice to come up and then the 6 blink code. During the this time the BL_ERR pin is high and drops low momentarily, then does it again on the 2nd try to boot (so Im assuming active low). The other thing is the backlight voltage ramps to ~280VDC from around ~160VDC and then back down as the TV tries to boot again. Does...
- Channel: Troubleshooting TVs and Video Sources
Today, 07:30 PM
Hilti Battery B22 4.0 blink green but not responding

by bohaboha

The HILTI CPC battery flashes green but no tool starts or works. when testing the battery has 19.2v what could be the problem with them because I have three similar ones but there is nothing written on them all the patches are removed in the first B22 /4.0 with 19.2v the second one B22 /5.2 with 21.8v the third B22 /4.0 with18.3v are all three destroyed ? a bit difficult to believe have also tried other Hilti tools the same thing if someone who can help very grateful...
- Channel: Troubleshooting Game Consoles & Other Weird Devices
Today, 08:05 AM
LG 65UQ7050ZUD No Picture Backlight On

by ChattFix

Hey everyone, I have an LG 65uq7050zud with a black picture but backlight is on. I tested the measurements from the PSU and they check out. I can’t find any service manual so I’m suspecting the main board. Any advice before I replace the board? Found them for around $60...
- Channel: Troubleshooting TVs and Video Sources
Yesterday, 12:10 PM
Need someone to look picture to say if this is normal or not [Uploaded in post]

by Omron

Guys I have set top box which has no power on in specific case. When I insert antenna plug which has 12V on it because of dB gain device on top of antenna, device if its turned off, it will not turn on.
After I need to open the case and short + and - on ABS10 chip and after that device will turn on, without antenna plugged in, after its turned on I can plug in antenna and it will work fine, but I notice there is some extra heat inside the unit.

Is this chip okay? Rectifier bridge ABS10 JQC I don't think there should be connection like additional diode between plus and minus...
- Channel: General Electronics Technical Discussion
Yesterday, 03:09 AM
DeLonghi AC Remote only accepts 3V

by cstout

Hello all, I've been looking into this portable air conditioner's remote control and can't find what could be causing the problem - or possibly this remote is just terribly designed.

The remote only works at exactly 3V - if I drop it any lower, using my bench power supply, to say, 2.9V then the remote will not flash the display and turn off. I don't have any AAA batteries that are exactly 1.5V each so I'm not sure if this remote is designed this way - to only use the freshest possible batteries, or if there's a failed component in the mix.

I can't find any schematics...
- Channel: Troubleshooting Game Consoles & Other Weird Devices
Today, 03:53 PM

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