Re: Question about AMD C50 replacement
Thank you!. I'll give it a try.
DSpawnZ
Member
Last Activity: 04-13-2025, 09:21 PM
Joined: 05-16-2009
Location: Río Cuarto
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Question about AMD C50 replacement
Hello!. I have a motherboard with a bad (shorted) AMD C50 CPU (CMC50AFPB22GT), and I have a spare AMD C60 CPU (CMC60AFPB22GV).
Does any one know is these two CPU can be swapped?.
Thank you. -
Re: Sony Vaio Z40UL MB Faulty onboard RAM
Thanks for the replies. I have a rework station but no access to new chips.
Owner does not want to wait until I buy them in China, so I thought disabling onboard ram and using a sodimm would be fine.Leave a comment:
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Sony Vaio Z40UL MB Faulty onboard RAM
Hello to all.
I have a Z40UL mobo (MBX-278) with faulty onboard RAM (4Gb)
I can't find the schematic to see if it's possible to disable onboard ram.
What happens if I just remove all the onboard ram chips and install a memory module on the empty slot?.
Machine boots fine but gives blue screens.
Memtest86 confirmed the faulty ram
Any advise would be great -
Re: Samsung NP3530EC
Hi. I will check later if I have the same board at hand. They look like capacitors.
RegardsLast edited by DSpawnZ; 09-17-2015, 12:26 PM.Leave a comment:
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Re: Samsung Np350v5c charging circuit problem
Tell me the board number. Usually starts with BAxxxxx, this might be on a sticker near the RAM slots, or printed on the board....Leave a comment:
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Re: Newbie asking for help. Thermaltake SL-B220SFX PSU dead.
I can hear it now, but it's not that noisy. It's a dual bearing fan....Leave a comment:
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Re: Newbie asking for help. Thermaltake SL-B220SFX PSU dead.
Yes. It spins freely. Now I have connected it to 12v bypassing the speed controller. I will check if temperatures have decreased....Leave a comment:
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Re: Newbie asking for help. Thermaltake SL-B220SFX PSU dead.
Yes that was what I thought. I've measured the wall power and it's 53watts.
But the psu gets warm. Maybe the fan is spinning too slow. It's connected to a speed controller that senses the secondary heatsink temperature.
I will try to connect the fan directly to 12 volts.
Regards...Last edited by DSpawnZ; 09-10-2015, 10:45 AM.Leave a comment:
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Re: Samsung Np350v5c charging circuit problem
Sometimes they are hard to find, as one would think that they might be close each other, or close to a chip, and you turn out finding that they are on the opposite side of the board. This can be frustrating. Don't give up searching. Samsungs are particularly known for missing or totally missing component reference on the PCB....Last edited by DSpawnZ; 09-10-2015, 10:47 AM.Leave a comment:
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Re: compaq 610 power on password
Hi. You will have to reflash the bios chip with an external programmer....Leave a comment:
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Re: Samsung Np350v5c charging circuit problem
Hi. I would start by checking at PU200, check ACDET and ACOK signal levels.
Check how they change when you plug and unplug the charger.Leave a comment:
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Re: Newbie asking for help. Thermaltake SL-B220SFX PSU dead.
Yes it's 220W, but I doubt it will reach that power. Right now it's powering a new AM1 motherboard with an Athlon 5350 (25WTDP), and a single hard disk, and it gets pretty warm. The fan starts quietly but after a few minutes it starts to be noticeable.
Caps are: 2 x 330uF x 200V
Good to learn how it works. A single tiny capacitor has taken away 4 hours of my life (on a weekend!). Ha ha.
Thanks again for your great support....Leave a comment:
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Re: Newbie asking for help. Thermaltake SL-B220SFX PSU dead.
Well. After checking Pin 1 traces, I've discovered it takes supply from 5vsb thru a 10 ohm resistor and a 10pf cap in parallel.
This cap was shot. After removing and replacing the bad guy, VCC raised to 4.8 volts and now the PSU is alive and kicking!.
Now I will consider replacing all capacitors, just in case.
Thank you guys for providing me guidance and the datasheet.
Will try to help others in the laptop section, as reparing them is my daily work.
Regards....Leave a comment:
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Re: Newbie asking for help. Thermaltake SL-B220SFX PSU dead.
These are the measures from 2012 chip:
Pin 1: VCC : 1.551v (is this good?)
Pin 2: PS_ON 0.2v (shorted to gnd with a wire)
Pin 3: V3.3: 0.3v
Pin 4: V5 : 0.2v
Pin 5: PP: 0.18v
Pin 6: PG_IN: 0.1v
Pin 7: O1: 1.517v DC (checked with the scope)
Pin 8: O2: 1.516v DC (checked with the scope)
Pin 9: PG: 0.1v
Pin 10: FB: 0.6v
Pin 11: VREF: 0.2v
Pin 12: GND
Pin 13: COMP: 0.205v
Pin 14: NEG: 0.107v
Pin 15: SS: 0v
...Leave a comment:
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Re: Newbie asking for help. Thermaltake SL-B220SFX PSU dead.
No. No fan twitch. Not a single spike of output. Always flat.
I have measured every single diode onboard. All good.
I have an oscilloscope. Will check with datasheet and report back.
What are the possibilities for the PWM chip to die?. Is it a common culript?
Other component I'd left unchecked is the optocoupler.
Cheers...Last edited by DSpawnZ; 09-06-2015, 11:11 AM.Leave a comment:
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Newbie asking for help. Thermaltake SL-B220SFX PSU dead.
Hi. Greetings from Argentina.
I'm having trouble with this PSU that was given to me. Previous owner discarded it without repair attempt.
I'm very new to PSU repair but have knowledge in electronics.
The PSU only has +5vsb and does not turn on when PS_ON is grounded.
I've checked every major capacitor with a capmeter, but I have no means to measure ESR. All caps measured good. Their brand is ANODIA.
PSU has 3 NPN Power Transistors that are good and 3 diodes at the output that are good.
All other diodes in the board measured good. All resistors measured good too....Last edited by DSpawnZ; 09-06-2015, 06:52 AM. -
Re: Problems with Samsung 740N monitors
Hi guys. Greetings from Argentina. First post here.
I have a 740N monitor that stopped working. Blue power led on, no image, no inverter.
I've found the famous three 820 uF caps bulged and changed them to 1000 uF.
Now the blue led flashes very fast and PS makes noise as fast as the flash.
I try to measure the output voltages and they are way high. 8V at the 5.1V part and 18V at the 13V part.
Can you help me with this? Sorry for my english
Thanks a lot!Leave a comment:
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