Help to identify IC on Linksys EA8500

xfox · 11-20-2018, 09:41 PM

Hello folks, recently I got wireless router Linksys EA8500, half working.
After visual board inspection I found one bad IC, cannot find anything in google,
maybe someone can help me to identify it. Looks looks it's CPU voltage regulator.
Marked as 208AB 627FL 2019 (UP8) - Voltage around IC - 0v
On other side there is another one 208AB 627FM 2080 (UP12) Voltage 1.05V
Photos in attach

**budm** · 11-20-2018, 10:49 PM

208AB looks to be Dual-Buck switching regulator, the 209AB looks to be single Buck switching regulator.
I have no luck finding any info on either one of them.

xfox · 11-21-2018, 08:28 PM

I think I found similar it's SMB208ANT-2019L or SMB208A
Now I have another problem, to find it in stock.

**sam_sam_sam** · 11-27-2018, 09:51 PM

You might have another problem if I read this correctly it says that it digitally programmed now is that to mean that it has to be programmed before it installed

**sam_sam_sam** · 11-27-2018, 09:53 PM

Quote:

DIGITAL INTERFACE/NON-VOLATILE PROGRAMMING 2
The built-in serial digital I C/SMBus compatible port and built-in non-volatile programming bring several benefits to power supply design with the SMB206A/7A/8A. Many external components are eliminated that would otherwise be used to set configuration and parametric values. Additionally, the digital interface allows for quick and easy development and debug without hardware changes. Finally, after the non-volatile power-up configuration, the serial port can be used to re-program the SMB206A/7A/8A by host software after the system is running. For quick programming development and debug use Summit’s prebuilt evaluation kit including a PC- based graphical user interface (GUI).

This is what I am talking about earlier

xfox · 12-07-2018, 08:06 PM

I think router's firmware doing that (IC programming/control), but anyway I was unable to find replacement, it's Qualcomm IC and there is no replacement, so body completely dead.

**sam_sam_sam** · 12-23-2018, 08:11 AM

You can try this

https://www.hkinventory.com/public/P...Code=&Qty=2562

I have not used them before
When I do an inquiry I ask if they take PayPal if they do not I will not use them
That is just me

11-20-2018, 10:49 PM	#2
budm Badcaps Veteran Join Date: Feb 2010 City & State: S.F. Bay area My Country: USA Line Voltage: 120V 60Hz I'm a: Knowledge Seeker Posts: 36,609	Re: Help to identify IC on Linksys EA8500 208AB looks to be Dual-Buck switching regulator, the 209AB looks to be single Buck switching regulator. I have no luck finding any info on either one of them. __________________ Never stop learning Basic LCD TV and Monitor troubleshooting guides. http://www.badcaps.net/forum/showthr...956#post305956 Voltage Regulator (LDO) testing: http://www.badcaps.net/forum/showthr...999#post300999 Inverter testing using old CFL: http://www.badcaps.net/forum/showthr...er+testing+cfl Tear down pictures : Hit the ">" Show Albums and stories" on the left side http://s807.photobucket.com/user/budm/library/ TV Factory reset codes listing: http://www.badcaps.net/forum/showthread.php?t=24809 Last edited by budm; 11-20-2018 at 10:59 PM..

11-27-2018, 09:51 PM	#4
sam_sam_sam Badcaps Veteran Join Date: Jul 2011 City & State: Sunny Jacksonville FL My Country: USA Line Voltage: 120 Volts 60 HZ I'm a: Knowledge Seeker Posts: 1,650	Re: Help to identify IC on Linksys EA8500 You might have another problem if I read this correctly it says that it digitally programmed now is that to mean that it has to be programmed before it installed __________________ 9 PC LCD Monitor 6 LCD Flat Screen TV 30 Desk Top Switching Power Supply 10 Battery Charger Switching Power Supply for Power Tool 6 18v Lithium Battery Power Boards for Tool Battery Packs 1 XBox 360 Switching Power Supply and M Board 25 Servo Drives 220/460 3 Phase 6 De-soldering Station Switching Power Supply 1 Power Supply 1 Dell Mother Board 15 Computer Power Supply 1 HP Printer Supply & Control Board * lighting finished it * These two repairs where found with a ESR meter...> Temp at 50F then at 90F the ESR reading more than 10% 1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later ) 2 Hem Saw Computer Stack Board All of these had CAPs POOF All of the mosfet that are taken out by bad caps

12-07-2018, 08:06 PM	#6
xfox New Member Join Date: Feb 2018 City & State: Phily, PA My Country: USA I'm a: Knowledge Seeker Posts: 10	Re: Help to identify IC on Linksys EA8500 I think router's firmware doing that (IC programming/control), but anyway I was unable to find replacement, it's Qualcomm IC and there is no replacement, so body completely dead.

12-23-2018, 08:11 AM	#7
sam_sam_sam Badcaps Veteran Join Date: Jul 2011 City & State: Sunny Jacksonville FL My Country: USA Line Voltage: 120 Volts 60 HZ I'm a: Knowledge Seeker Posts: 1,650	Re: Help to identify IC on Linksys EA8500 You can try this https://www.hkinventory.com/public/P...Code=&Qty=2562 I have not used them before When I do an inquiry I ask if they take PayPal if they do not I will not use them That is just me

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