Re: Anyone ever replace an 80 pin surface mount IC successfully?
Good information. I did use a heat gun. I forget the details of what went wrong, as this was a while ago, but I appreciate the tips.
I'm happy to say I finally found the right replacement board for the Sony TV.
I use the Denon for music only.
So I guess all is right with the world.
Thanks.
thesteve
Member
Last Activity: 03-09-2023, 09:56 PM
Joined: 06-28-2021
Location: Watchung, NJ
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Got it!!!
So after two days of no reply from the eBay seller, I figured I would risk trying the USB firmware update and if it didn't work I'd just return it since the seller was ignoring me.
Well one thing I only mentioned in an earlier post was that I had to trim the ears on the LVDS cable for it to fit in the first and second eBay main boards I tried. This was because the connector was slightly different. (I should have taken this as a hint that I had the wrong board.)
So with the ears missing, when I would plug it into the proper board (my original board...Leave a comment:
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Re: Sony experts? 2nd bricked BAT Board after firmware update KDL-55EX720
Good point. I do have hi-temp epoxy I can mix up if necessary.Leave a comment:
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Re: Sony experts? 2nd bricked BAT Board after firmware update KDL-55EX720
Well I have 30 days to return the latest eBay boards so it's worth a shot.
That's good advice. I think there's a chance the replacement HDMI chip is properly soldered in place. So I was thinking of just using less than a drop of some kind of glue to stick the surface mount resistors/caps in place, and then once they are fixed I could solder them with a fine tip iron.
They're so small, there's no identifying marks on them... they're either black or tan in color. I hope they are...Leave a comment:
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Re: Sony experts? 2nd bricked BAT Board after firmware update KDL-55EX720
Thanks, that's an ingenious idea.
I wonder if I should try to replace the missing tiny surface mount components first, though. If I apply myself it should be possible... it's just so incredibly stressful to deal with those microscopic parts.
It seems I have a Sophie's choice of sorts.Leave a comment:
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Re: Sony experts? 2nd bricked BAT Board after firmware update KDL-55EX720
Correct, I should have said original tcon.
So I think you're suggesting I use the new main board along with its matched tcon board and update the firmware.
What is "tot accesses?" Is that Total? Could this Sony strategy be explained to me a little further please? Are you saying Sony prevents an old dog from learning new tricks (being reprogrammed to work again like I'm trying to do).
Just to repeat past posts and so we're all on the same page, my TV still works 100%...Leave a comment:
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Re: Sony experts? 2nd bricked BAT Board after firmware update KDL-55EX720
Thanks, this is all great information!
So I have a matched pair of T-Con & main board from a supposedly known working set (cracked screen).
My two previous attempts at USB update seemed to work but ended in failure.
Do you guys think this was because the model number (and panel size) of those previous boards was a mismatch?
Do you think I should try the USB firmware update again with this latest well-matched main board?
I think the info on the USB is...Last edited by thesteve; 10-06-2021, 06:51 PM.Leave a comment:
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Re: Sony experts? 2nd bricked BAT Board after firmware update KDL-55EX720
I'm still learning. I [I]do[/I] know there is a number for the panel printed on a barcode on my panel that matches a number that comes up in the service menu.
[url]https://drive.google.com/file/d/10L6nTYZahKmi06TcD_xbeYnqptMuTPss/view?usp=sharing[/url]
I couldn't match any numbers from the main board though in the service menu.
This is the document I've been trying to understand:
[url]https://cdn.badcaps-static.com/pdfs/5ac85c00c593e003b0da8b52e603fef6.pdf[/url]...Last edited by thesteve; 10-05-2021, 07:15 PM.Leave a comment:
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Re: Sony experts? 2nd bricked BAT Board after firmware update KDL-55EX720
I was a professional technician in the early 90's to pay for college. Now I'm an electrical engineer, so you can call me an amateur.
On page 24 of "Service Procedure for Panel, Board and Software Change / Upgrade" from Sony for the AZ2 CHASSIS it says:
[COLOR="Red"]Warning Note:[/COLOR]
*Because the ID for identifying the device is installed on the BAT board of FTV, never attempt to mount the BAT board removed from a customer's set onto another...Leave a comment:
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Re: Sony experts? 2nd bricked BAT Board after firmware update KDL-55EX720
I don't think you can re-use a Sony main board. I'd like to hear an expert tell me they've actually done it.
The service manual actually threatens the technician with legal action. Something to do with encryption.
But like you say... I finally found the section of the service manual that half-way explains it and there are all sorts of codes and numbers that have to be set in the service mode. But I can't get into service mode.
I tried one of the older boards that I re-flashed...Last edited by thesteve; 10-05-2021, 05:31 PM.Leave a comment:
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Re: Sony experts? 2nd bricked BAT Board after firmware update KDL-55EX720
Hi this post was a continuation of another post where I mentioned that the TV and all it's boards function perfectly except that the HDMI select chip heats up.
That's why I'm replacing the B* board and how I know the other boards are fine.
I re-read the instructions on replacing the B* board from the service manuals I could find, and it looks like there's no getting around re-flashing the firmware, even if it's a board from the same model.
But another step I see I may have missed is,...Leave a comment:
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Re: Sony experts? 2nd bricked BAT Board after firmware update KDL-55EX720
Hi, the notification that someone replied to this must have gone to my spam folder...
So since my last post, I tried replacing the HDMI chip. It would have worked, I think, BUT I stupidly dragged the bad HDMI chip a bit on the board while trying to remove it and dislodged a half a dozen tiny bypass caps and input resistors. These tiny parts were about the size of a black pepper flake.
So I just received a THIRD board I bought on eBay for $100 because I refuse to give up.
This...Last edited by thesteve; 10-04-2021, 07:10 PM.Leave a comment:
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Re: Sony experts? 2nd bricked BAT Board after firmware update KDL-55EX720
I guess it will remain a mystery...
At least I can use them for donors for the HDMI chip.
ThanksLeave a comment:
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Re: Sony experts? 2nd bricked BAT Board after firmware update KDL-55EX720
Yeah, that's the plan. Have to get a smaller tip for my old Weller. Or a new iron.
Suggestions? I have a heat gun already.Leave a comment:
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Sony experts? 2nd bricked BAT Board after firmware update KDL-55EX720
So I bought another main board from eBay and the same thing happened.
I got the firmware file from the Sony website. My model was listed and everything matched.
[B]sony_tvupdate_2011_4027_aaa_auth.zip[/B] was the file.
Extracted to a folder: "sony_dtv0FA10A01A0A1_00000301"
with file: [B]00000301_07e8046a.bin[/B] inside.
Loaded it into the root of an otherwise empty USB thumbnail bought from around the same time as the TV. Not too old, not too new.. under 2Gig.
The file [U]reads[/U] perfectly. Lots of "disk... -
Re: Anyone ever replace an 80 pin surface mount IC successfully?
Yeah, I ruined a very nice Denon receiver trying to replace a similar chip. Time I got the right tools. A few traces disappeared... I guess it's still possible to fix.
This sounds like a plan. Maybe I can even fix my old iPhone 5 that I messed up while replacing the battery. They put some tiny surface mount transistors right in the first place anyone would think to pry the battery out. It still works but no home button or power switch.
For the record, when I was in my 20's back in 1993 or...Last edited by thesteve; 07-01-2021, 11:05 PM.Leave a comment:
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Re: Anyone ever replace an 80 pin surface mount IC successfully?
You just reminded me of something I need to buy.
So I guess the heat gun method is only for removal of the old IC.
That makes sense... can't go wrong with one pin at a time I guess.
Although I think I may also need a stereo microscope... this thing is so tiny I have a hard time counting the pins with my magnifying reading glasses.
[URL="https://www.semiconductorstore.com/pdf/newsite/SiliconImage/SiI9287_DB.pdf"]https://www.semiconductorstore.com/pdf/ne...Leave a comment:
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Anyone ever replace an 80 pin surface mount IC successfully?
The last time I tried, the replacement IC shifted slightly while reheating.
It was all downhill from there.
I have a bad HDMI switch IC in an otherwise beautiful 55" Sony. -
Re: Sony Bravia blinking red 7 times after lightening KDL-55DL-55EX720
I found the problem.
The thermal sensor is doing its job... the trouble is its neighbor, the HDMI port processor (ic5500) which gets so hot I burned my finger.
This makes sense since the lightning that zapped my electronics came from the HDMI cable from my cable box.
I remember now, that after restarting the TV after the lightning, the original HDMI port I was using no longer worked.
Then the shut down problem began with the 7 red LEDs.
Oh well, maybe I can...Leave a comment:
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Sony Firmware update interrupted early? Now what. KDL55EX-720
Hi, apologies for another post but as I figure things out I have entirely different questions.
I'm pretty sure I prematurely interrupted my firmware update. This was done "blindly" from a USB drive with no display (after replacing the B* board).
Now when I plug it in I get the dual blinking amber and green lights like before, but there is no USB activity at any time.
After a minute or so, the dual blinking amber and green lights stop and I get a solid red light, followed eventually by 8 red flashes (software error).
It's a...
No activity results to display
Leave a comment: