Does anyone have schematics to this PSU? I've got one with an apparently shorted 12V rail. Pulled and checked the rectifier, it's good. Now I'm not sure where to start looking for shorts.
-
Don't buy those $10 PSU "specials". They fail, and they have taken whole computers with them.
My computer doubles as a space heater.
Permanently Retired Systems:
RIP Advantech UNO-3072LA (2008-2021) - Decommissioned and taken out of service permanently due to lack of software support for it. Not very likely to ever be recommissioned again.
Asus Q550LF (Old main laptop, 2014-2022) - Decommissioned and stripped due to a myriad of problems, the main battery bloating being the final nail in the coffin.
Kooky and Kool Systems
- 1996 Power Macintosh 7200/120 + PC Compatibility Card - Under Restoration
- 1993 Gateway 2000 80486DX/50 - Fully Operational/WIP
- 2004 Athlon 64 Retro Gaming System - Indefinitely Parked
- Main Workstation - Fully operational!
sigpic -
Re: Astec AA15990 Schematics
Got any pictures of this power supply? The only astec supplies I worked on were the old open frame ones with the 3 white connectors for the output. They had a protection scr across the +12 volt output that would turn on if the +5 volts was too high.Last edited by R_J; 09-24-2020, 09:33 PM.
-
Hello!
I'm looking at an original Xbox PSU: Foxlink ftps-0002 rev. B. The 12 V output is too low, and the 5 V output is too (?) high. Unfortunately I don't have an oscilloscope but only a DMM for diagnosis.
Measured voltages with no load:
After rectifier diodes
12V: 6.17 V
5V: 5.67 V
Secondary transformer pins AC measurement (really don't know if this says anything)
12V: 2-2.5 V
5V: 1.04 V
I also have another (working) Xbox psu from Delta. The same measures there, in order, being: 10.79,... -
Hi all, a newby question about a bridge rectifier I'm trying to identify.
I'm in the midst of reparing a battery charger in work which went pop, The bridge rectifier has shorted and took out a couple of other components. The rectifier in question has a part number KPB305G, and it looks like it's obsolete. Does any one know what I could replace it with?... -
Hello Everyone,
I will be really grateful if someone shares schematics and if possible the boardview of the old Asus Nexus 7 (2012) Tablet. The motherboard is ME370T Rev. 2.4. Now I can find schematics for the Rev. 1.0 but I could not find the schematics for the Rev 2.4. I tried to look for similarities in the Rev. 1 but there are somethings missing, plus the board i have has nearly no component names printed on it which as a newbie makes pretty hard for me to locate things. Any assistance will be appreciated. Thank you. -
If anyone needs schematic diagrams for any pro audio gear like what professional musicians use, such as guitar amps, power amplifiers, vintage tube amps, musical gear like keyboards, effects pedals, guitar wiring diagrams and service manuals, check out https://schematics.ca . I'm a road musician and an electronics tech and I got schematics for just about every piece of gear in my band from this site and they are free to download. It's always good to be prepared in case you fry something while on on the road, which always happens it seems. https://schematics-free.com has a lot of free audio schematics... -
Hello everyone,
I'm trying to fix up my battery charger. Where I found a dead schottky rectifier.
This is the dead component PTR30L120CTF:
PTR30L120CTF datasheet(1/7 Pages) PFC | 30A 120V HPTR Schottky Rectifier (alldatasheet.com)
And I have a spare 30CPQ150:
30CPQ150 datasheet(1/5 Pages) IRF | SCHOTTKY RECTIFIER (alldatasheet.com)
Can I use this diode as a replacement or if not, can you recommend me a proper replacement?
I cannot find the exact unit anywhere besides aliexpress and such.
Thank you guys!
Comment