Hi, this is for troubleshooting and, hopefully, repairing a Delta Power psu
that is still quite new, as it worked OK for some months until it failed.
At the time I was not into power supply electronics; it was put
aside and a new power supply installed inside the computer. Also at the time
power supplies were half the price of today's.
On the PCB there are a D339 and 7500B chips.
I have found that schematics with these 2 chips (see included file).
Does it represent the actual circuit of the MAX-500ATX, I cannot tell.
Some measurements,...
No content found
Please log in to your account to view your subscribed posts.
| Directory | Topics | Posts | Last Post | |||
|---|---|---|---|---|---|---|
| Badcaps Capacitor & Electronics Repair Forum | ||||||
|
Frequently Asked Questions (No Posting)
All new members, PLEASE READ HERE FIRST! Posting only allowed by established members.
Topics: 45
Posts: 733
|
45 | 733 |
|
|||
|
Announcements & Related News
Site announcements, capacitor-related news, and anything relavant you might think of... Got News? POST IT!!
Topics: 236
Posts: 42,542
|
236 | 42,542 |
|
|||
| 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
|
2 | 5 |
|
|||
| 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: 32,744
Last Post:
How can I test non-polarized capacitor?
|
3,195 | 32,744 |
|
|||
|
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: 4,509
Posts: 74,899
|
4,509 | 74,899 | ||||
| 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: 3,997
Posts: 44,556
Last Post:
Adapter 24 volt problem
|
3,997 | 44,556 |
|
|||
|
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: 6,903
Posts: 37,764
|
6,903 | 37,764 |
|
|||
|
Sub-Forums:
| ||||||
|
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: 5,459
Last Post:
4G LTE router sim socket replacement
|
502 | 5,459 |
|
|||
|
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: 32,318
Posts: 309,254
Last Post:
Compaq 420 schematic
|
32,318 | 309,254 |
|
|||
|
Sub-Forums:
| ||||||
|
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: 75,749
|
5,332 | 75,749 |
|
|||
|
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: 27,509
Posts: 375,338
Last Post:
Samsung le40a656a1f reaaaaaly slow poer up
|
27,509 | 375,338 |
|
|||
|
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: 4,198
Posts: 65,366
|
4,198 | 65,366 |
|
|||
|
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: 307
Posts: 1,689
Last Post:
Celestron PentaView LCD Digital Microscope
|
307 | 1,689 |
|
|||
|
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: 2,344
Posts: 27,611
Last Post:
Yamaha RX-V577 - DC: PRT 000L
|
2,344 | 27,611 |
|
|||
|
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: 228
Posts: 3,942
Last Post:
Samsung WD80N645OOW died mid-cycle
|
228 | 3,942 |
|
|||
|
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: 1,023
Posts: 10,997
|
1,023 | 10,997 |
|
|||
|
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: 19,500
|
1,382 | 19,500 |
|
|||
-
Yesterday, 03:34 PM
-
I got a new EC chip cause old one was shorted but I need to reprogram it somehow. I got the chip and the programmer/reader. I also trying to figure out where to hook up the wires for the programmer. It says to connect to SM bus on motherboard . Any help is appreciated.
[ATTACH=JSON]{"alt":"Click image for larger version Name:\tScreenshot 2024-06-04 173121.png Views:\t8 Size:\t215.1 KB ID:\t3284149","data-align":"none","data-attachmentid":"3284149","data-size":"full","title":"Screenshot 2024-06-04...06-04-2024, 03:30 PM -
I have Asus Z170 Pro Gaming motherboard, it's working fine apart from the reset and shutdown commands. It doesn't restart when exit the bios or choose to restart in the operating system. Shut down also doesn't work, everything works normally until the moment it should turn off. The only way to turn off is by keep pressing power button for a few seconds. What could it be? This would be my first motherboard repair06-04-2024, 12:57 AM
-
I started troubleshooting this Razer Blade 15 laptop DA560 motgerboard a while back, due to some shorted 19v, 5v, 1v power rails. I fixed some of components and think 19v rail is good, 5v rail is good, 3v is better but not all way i think, and 1v is still bad. At this point the diode reading on these rails are 19v - 0.032v , 5v - 0.167v, 3 - 0.63v and 1v - 0.005v .
When the rails when down, I went down different rabbit holes and seeing chips getting pretty warm on thermal but not blazing hot. Yet there were not any caps or any small components getting blazing hot. Example is EC chip,...Today, 11:35 AM -
Hi fellow lifesavers.
I have a Samsung washer-dryer WD80N645OOW which died mid-cycle. No response to anything, completely dead.
Checked the socket, the plug fuse, all good. Took it out to examine the boards.
There is a relay clicking on the mainboard. Upon applying power, I can see a diode flashing on inverter board, after a while a diode on main board lits up for a split second, then I can hear a relay clicking. This repeats a few times, then everything dies completely.
I've been trying to examine the main board, but it's a bit difficult becuse...Today, 09:11 AM -
Hello forum!
I have received a lot of help here, regarding bios modding. Very thankful!
Now I have a lot of Fujitsu K557 desktops, and those have custom bios logo/custom splash screen, and I need to change them to the original Fujitsu logo.
I am looking for the easiest way, because I have about 40pcs of them, and I think there is some "official" way to do this.
I have tried a lot of Fujitsu tools, which can inject the logo to the bios file, but no luck.
Any suggestions? Thanks!Today, 11:24 AM -
Hello !
I want to have the right file and clean Me
I will post old file....Today, 10:56 AM -
daxktdmb8c0
Maybe someone has a photo of a section of the board, otherwise there are no diagrams or boardview...Yesterday, 12:31 PM -
I have this inexplicable problem from yesterday
Each time i start my laptop by pushing the physical power button in, the laptop keyboard and touchpad are available to me for use when the system has booted to the desktop (I can enter the bios by pressing on F10 too) irrespective of whether the laptop is powered by the AC adapter or the battery. This is normal behaviour
BUT NOW FOR THE ABNORMAL PART
However, when using the laptop normally, if i choose restart from the power options, the touchpad and mouse are non-functional when the system has booted to the...Today, 10:35 AM -
Hello.
I need help with a laptop Dell with LA-D801P motherboard.
The laptop completely died, no power, no leds.
The voltage of 19V is present at the output of the second mosfet.
The voltage on Pin 9 and 19 of PU102 is 0V.
Voltage on
PU100 :
pin2 =19v
pin11 =4.16v
pin12 =0.18v
pin17 =0v
pin19 =0v
I have 0 ohms on the coils PL100, PL301 and PL700.
If I remove pjp102 the short remains on the side of +3VALW.
Then I removed pjp501 and pjp801 but the short did not go to the integrated PU500 and PU800.
Then I checked...Yesterday, 02:54 AM
-
Hi fellow lifesavers.
I have a Samsung washer-dryer WD80N645OOW which died mid-cycle. No response to anything, completely dead.
Checked the socket, the plug fuse, all good. Took it out to examine the boards.
There is a relay clicking on the mainboard. Upon applying power, I can see a diode flashing on inverter board, after a while a diode on main board lits up for a split second, then I can hear a relay clicking. This repeats a few times, then everything dies completely.
I've been trying to examine the main board, but it's a bit difficult becuse...Today, 09:11 AM -
Hello.i have hp 840 g5 with endpoint security error
my files...Today, 08:16 AM -
I started troubleshooting this Razer Blade 15 laptop DA560 motgerboard a while back, due to some shorted 19v, 5v, 1v power rails. I fixed some of components and think 19v rail is good, 5v rail is good, 3v is better but not all way i think, and 1v is still bad. At this point the diode reading on these rails are 19v - 0.032v , 5v - 0.167v, 3 - 0.63v and 1v - 0.005v .
When the rails when down, I went down different rabbit holes and seeing chips getting pretty warm on thermal but not blazing hot. Yet there were not any caps or any small components getting blazing hot. Example is EC chip,...Today, 11:35 AM -
Hello forum!
I have received a lot of help here, regarding bios modding. Very thankful!
Now I have a lot of Fujitsu K557 desktops, and those have custom bios logo/custom splash screen, and I need to change them to the original Fujitsu logo.
I am looking for the easiest way, because I have about 40pcs of them, and I think there is some "official" way to do this.
I have tried a lot of Fujitsu tools, which can inject the logo to the bios file, but no luck.
Any suggestions? Thanks!Today, 11:24 AM -
Hello !
I want to have the right file and clean Me
I will post old file....Today, 10:56 AM -
I have this inexplicable problem from yesterday
Each time i start my laptop by pushing the physical power button in, the laptop keyboard and touchpad are available to me for use when the system has booted to the desktop (I can enter the bios by pressing on F10 too) irrespective of whether the laptop is powered by the AC adapter or the battery. This is normal behaviour
BUT NOW FOR THE ABNORMAL PART
However, when using the laptop normally, if i choose restart from the power options, the touchpad and mouse are non-functional when the system has booted to the...Today, 10:35 AM -
[B][SIZE=16px][U]Singer X455U[/U] BIOS need (6-71-w94p0-d02)[/SIZE][/B]
[I][B][SIZE=16px]please give me, me cleared bios or backup bios from same model asap.[/SIZE][/B][/I][B][SIZE=16px][U]Singer X455U[/U] BIOS need (6-71-w94p0-d02)[/SIZE][/B]
[I][B][SIZE=16px]please give me, me cleared bios or backup bios from same model asap.[/SIZE][/B][/I][B][SIZE=16px][U]Singer X455U[/U] BIOS need (6-71-w94p0-d02)[/SIZE][/B]
[I][B][SIZE=16px]please give me, me cleared bios or backup bios from same model asap.[/SIZE][/B][/I][B][SIZE=16px][U]Singer X455U[/U] BIOS need (6-71-w94p0-d02)[/SIZE][/B]Today, 07:26 AM -
HI. Need to remove the BIOS password. Original BIOS bin file attached to this message. Thanks!...Today, 09:26 AM
-
hi everyone........
i need asus expertbook B1500CEAE original bios. please help me...Today, 07:09 AM -
Hi everyone,
I have a problem with this dell mini desktop, no LED lights up and there is no response from the front power button. It literally feels defunct, with no feedback whatsoever.
IPCML-CT motherboard rev.A00
CPU: Intel Celeron G5900T
I tested the power supply (19.5v correctly) but to be careful I also used an alternative power supply to test, nothing. No LEDs, no power on.
I tested the power button pins and they correctly measure 3.3V, so when I press the button or put a bridge with a wire, the pulse seems to be there correctly.
...Today, 08:48 AM