Re: Samsung Syncmaster 225BW
Well, I was able to find a throughole connected to the trace of the pad I lost, which I was able to tin and connect a wire from the leg of the cap to. It doesn't look the prettiest, but I now have power again. I then lifted pin8 of the IC200 A81SC... full colour desktop again. My local shop carries the AT24C08N, so I'm picking up a rework station at the end of the month and a couple of chips.. 1 for each monitor....
spuzzum
New Member
Last Activity: 11-06-2014, 05:19 PM
Joined: 10-05-2014
Location: Vancouver, BC
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Re: Samsung 205bw Logic Board Replacement BN41-00705C
reviving an old thread...
I'm having similar issues with the same logic board (BN41-00705C), but with all my searches, the problem had been with the NVRAM A21SC (24C02). I was about to get some 24C02's, but after reading Wizard's reply, I'm not sure if I should replace the eeprom beside the big chip instead (IC301).
"The Pm25LV512/010 are 512 Kbit/1 Mbits 3.0 Volt-only serial Flash memories. These devices are designed to use a single low voltage, range from 2.7 Volt to 3.6 Volt, power supply...Leave a comment:
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Re: Samsung Syncmaster 223BW - blank screen..
Do a google for 24cxx eeprom programmer, and make one yourself.. cost like $5 in parts, and it's a pretty simple circuit. There's even a 4-pin socket on the board that I'm betting is for programming.
But from what I've been reading.. you can dump and flash the chip directly from the desktop. Here's a post from a thread where somebody wrote a fixed eeprom back to his monitor with a GUI...
[url]http://ubuntuforums.org/showthread.php?t=1994729&page=2&p=12002011#post12002011[/url]Re:...Leave a comment:
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Re: Samsung Syncmaster 205bw, blink of death
ok, I think I got it...
A81SC = 24C08 and A21SC = 24C02Leave a comment:
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Re: Samsung Syncmaster 205bw, blink of death
I think he just helped me.
I have 2 205BW's.. 1 I bought brand new in 2008, and 1 I picked up for parts 2 weeks ago, when mine decided to go all red 1 morning.. with the buttons and menus all messed up. I used the free monitor to test with first.. 3 out of the 4 470uF caps were bulged with 1 of them starting to leak. I replaced all 4 470uF with EEU-FM1V471, and the 1 1000uF with EEU-FM1E102. It fires up to a full colour desktop. I then opened my monitor, but the caps looked completely fine.. I repleced them anyways. The...Last edited by spuzzum; 10-10-2014, 11:10 PM.Leave a comment:
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Re: Samsung Syncmaster 225BW
Well.. caps came, but when removing the old caps.. 1 of the pads came up off the board. I tinned and soldered to the trace, but no go... blank screen. I must have broken the connection to the other side of the pad. Oh well.. I guess I'm looking for a new driver board off ebay.Leave a comment:
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Re: Samsung Syncmaster 225BW
Nope.. making a Digi-Key order. Caps from the motherboard were 18+ Ohms.Leave a comment:
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Re: Samsung Syncmaster 225BW
Well, according to that video, those 100uF 16v surface mount caps should be between 0.6uF - 0.9uF.. at the highest. My readings were 0.50, 0.52, then 5.77, 5.81, and even 14.37 Ohms. I think I found the problem. They're all the same caps, so they should all have the same ESR. :P
I'm about to pull some 100uF 16v caps from an old motherboard.. I haven't checked the Ohms on them yet though. Worst case is another order from Digi-Key... I need some more stuff for another project anyways.
Fingers crossed.......Leave a comment:
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Re: Samsung Syncmaster 225BW
Well, I originally had the same issue as ppmz.. my Syncmaster 205BW went completely red last week, but not seeing this thread yet, I found another 205BW on craigslist for $35. But when I went to pick it up.. it went red as he's showing it to me. He gave it to me for parts. I then found this thread, and decided to use his monitor as the tester. Opened it up, and sure enough.. his power board had 3 buldging caps, with 1 of them leaking. I ordered enough caps for both monitors from Digi-Key:
1000uF 25V, 105°C, ESR: 18mOhm, Ripple Current:...Leave a comment:
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