Information on original IBM 5150 PC power supply?

kens

New Member

Join Date: Jan 2012

Posts: 1
#1

Information on original IBM 5150 PC power supply?

01-31-2012, 01:42 AM

I was wondering about the internals of the original IBM PC power supply, and figured the people here might be able to fill me in. Did it use the TL494? What topology did the PSU use? It was made by Astec, right? Does anyone have a schematic? (Probably too much to hope for.) I've searched the web, but couldn't find much information except it was 63.5W.

Thanks,
Ken
Tags: None

Previous template Next

Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?

by Tynan Dill

I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.

Upon bringing it home and plugging it up, it showed a standby light.

I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.

The screen seems to blackout and stay black, but with a flashlight I can see the display.

With my Playstation 4 connected via HDMI, and running a game I can hear sound.

Assuming...

7 Photos
- Channel: Troubleshooting TVs and Video Sources
11-22-2024, 01:46 PM
Definitive technology SC 2000 subwoofer amp's power supply clicking and popping

by JimBanville

The sub developed a constant popping every couple seconds from woofer and power LED flickering with nothing but wall AC connected. Connecting an audio cable didn't change anything. It doesn't play but a second or two of audio in between the pops.
Opened it up and discovered the power supply is making a faint clicking or ticking sound.
I measured the amp's output to the woofer and it pulses up to 50mv DC to be driver. The pulses coincide with the power supply ticking/clicking.
I measured the power supply output going to the amp board and it too has this pulsing. Voltage cycles...
- Channel: Troubleshooting Audio Equipment
09-13-2023, 07:21 AM
Power supply Manson NTP-5561 (5661) LCD controller dead - PIC18F87K90 HEX dump required

by Andreas_de

Hello!

i got a damaged Manson NTP-5561 (60V, 1,6A DC output) and and the main issue is that the controler IC for the LCD display has a short. The controler IC PIC18F87K90 is mounted on the back of the back of the LCD. Vss-Vdd = 3 Ohm. The 5V and 3,3V power line was killed as well, but that is not a problem. A new LDO 3,3V and 5V 7805 is already ordered.
Replacing the PIC18F87K90 is necessary but that makes no sense without having the HEX dump of the new controler.

Does anybody have such a power supply and could do a HEX dump of the Flash and EEPROM memory?
...

2 Photos
- Channel: Troubleshooting Power Supplies and Power Supply Design
04-12-2025, 10:38 AM
Hi, Can we use SMPS Bench Power Supply for Laptop troubleshooting?

by shamsudeen

Hi all, I just need to know that, can i use SMPS type power supply to test and short circuit detection on a laptop motherboard?
I saw 95% of repair guys are using only Linear bench power supply. linear bench power supply is pricy, thats why i planned to get one SMPS supply.

i know that in linear power supply the noise will be very low comparing to SMPS supply....
- Channel: General Electronics Technical Discussion
07-19-2025, 07:14 AM
Samsug washing machine. Power supply DC41-00189a board issue

by Soulzink

Hi everyone,

I am trying to fix a samsung washinmachine power supply main board.
I already replaced it with another one to fix the machine but i want to try understand the issue with the old board.
Therefore i hope to be able to get some help to explain what to check in order to troubleshoot.
The power supply board reference is the following: DC41-00189a
I have followed one thread (https://www.badcaps.net/forum/troubl...ingmachine-rel...
- Channel: Troubleshooting Power Supplies and Power Supply Design
04-19-2025, 06:26 AM
Loading...
No more items.

Information on original IBM 5150 PC power supply?

Information on original IBM 5150 PC power supply?

Related Topics