Re: 40" Sony LCD KDL-40EX500 Seconds to black (6 blinks)
Good pics, thanks. Can you read the part # on the tiny IC4901?
Good pics, thanks. Can you read the part # on the tiny IC4901?
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Re: 40" Sony LCD KDL-40EX500 Seconds to black (6 blinks)
I can't seem to find IC4901, did you mean IC6401 (If I'm guessing you tried to read it backwards? lol)
I can't see it myself but luckily I finallly fixed my original camera and i think it can pick it up. I think it says EB1?Attached FilesComment
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Re: 40" Sony LCD KDL-40EX500 Seconds to black (6 blinks)
Got a perfect photo of the label! =D
What does that triangle symbol mean?Attached FilesComment
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Re: 40" Sony LCD KDL-40EX500 Seconds to black (6 blinks)
Yeah that's the one. No schematics in the manual. Can't find anything for that device. But it definitely looks like a TL431...Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: 40" Sony LCD KDL-40EX500 Seconds to black (6 blinks)
What exactly does it do?Comment
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Re: 40" Sony LCD KDL-40EX500 Seconds to black (6 blinks)
Voltage reference - regulates the outputs.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: 40" Sony LCD KDL-40EX500 Seconds to black (6 blinks)
So I have to replace it with a TL431?
I've been looking around for an EB1 datasheet. Does this look like the one?Attached FilesComment
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Re: 40" Sony LCD KDL-40EX500 Seconds to black (6 blinks)
Give it has three pins connected, but that device has only two, it seems unlikely.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: 40" Sony LCD KDL-40EX500 Seconds to black (6 blinks)
The right pin measures 2.49V steady as it cycles through the problem.
The left pin measures 10.84V steady only when the lights come on, when it goes off it goes unsteady between 10.20V to 10.77 VComment
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Re: 40" Sony LCD KDL-40EX500 Seconds to black (6 blinks)
2.49V is good actually -- that's the reference voltage. On this picture https://www.badcaps.net/forum/attach...1&d=1359769688, is there 12.9V at the jumper near R6411?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: 40" Sony LCD KDL-40EX500 Seconds to black (6 blinks)
Do you mean here? Getting 12.9V on th right and 2.5V on the leftAttached FilesLast edited by tieny; 02-02-2013, 11:23 AM.Comment
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Re: 40" Sony LCD KDL-40EX500 Seconds to black (6 blinks)
The two resistors below it, in this case.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: 40" Sony LCD KDL-40EX500 Seconds to black (6 blinks)
heres what i got on those two resistorsAttached FilesComment
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Re: 40" Sony LCD KDL-40EX500 Seconds to black (6 blinks)
It appears to combine feedback from 24V and 12V, unlike singly regulating just one rail. So the fault is most likely in the lower feedback resistor, which these two connect to. Are the values for any of these written on the devices? They will be written in code e.g. 10C.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: 40" Sony LCD KDL-40EX500 Seconds to black (6 blinks)
Heres the label of the resistors.
Is 752 the lower feedback resistor?Attached FilesComment
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Re: 40" Sony LCD KDL-40EX500 Seconds to black (6 blinks)
Those are the main ones, but see that common trace they all feed into? This should go into the "TL431", then there will be a resistor from there into ground, do you see that?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: 40" Sony LCD KDL-40EX500 Seconds to black (6 blinks)
ah, do you mean these?Attached FilesComment
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Re: 40" Sony LCD KDL-40EX500 Seconds to black (6 blinks)
Is one of the ends there grounded, and the other end goes to those three resistors? Test for continuity.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: 40" Sony LCD KDL-40EX500 Seconds to black (6 blinks)
Yep I thats right, one is grounded and the other goes to those resistorsAttached FilesComment
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Re: 40" Sony LCD KDL-40EX500 Seconds to black (6 blinks)
Good.
Read the values off each.
Then use this SMD code table to work out the values:
http://www.talkingelectronics.com/pr...-Markings.html
For the two parallel 24V resistors, read their individual values, then calculate the equivalent parallel resistance using Rpar = (R1*R2)/(R1+R2).Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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I'm currently working on repairing a malfunctioning Sony TV model KD-65XE7005 with the mainboard 1-981-926-21. I would appreciate your assistance with this issue.
Upon powering on the TV, the Sony logo appears for approximately 3 seconds, after which the backlight remains lit, the screen remains black, and nothing else happens. The TV consumes around 55W initially and then drops to 35W. The indicator LED remains solid white. It doesn't respond to the remote control. When attempting to update the TV using a USB dongle, the dongle briefly flashes but nothing else happens.
...05-21-2023, 11:56 PM -
Hi community! Germany calling
I am wondering if you guys can help me out. I have an issue with my Sony LED TV. I've been told this is a good place to ask. Thanks for anyone who will reply and offer advice. Appreciated!
I have a KD-65X9005A Sony 4k LED TV. For a few weeks I've got this problem where I turn on the TV and within a few seconds the TV starts getting darker until it shuts itself off and I get the 4 blinking error code. HOWEVER there is one exception: Whenever I switch to the i-Manual, a full screen on-screen instruction manual, the TV never turns off. I tested for hours!... -
Hi everyone!
I have a Sony KD-65A1 TV with a fault – 4 red LED blinks. After disassembly and visual inspection, I found that the G76 power board and DKA board had been replaced. It is also possible that TCON was replaced, but I am not sure – there are a few marker marks that could be factory-made.
Based on assumptions, the previous service attempted to solve the issue by replacing potentially faulty components. I decided to investigate further, found a service manual, and figured out a way to power up the power supply unit autonomously and put the OLED panel and... -
Hi I'm new to trying to repair TVs, but I saw a broken OLED offered for a reasonable price and thought I'd try my hand at it.
I found the service manual, which was critical to know where to probe.
https://www.manualslib.com/manual/20...1e-Series.html
With it I was able to determine that my DKA board was bad, when P_ON#1/2 gets enabled REG_12 on the DKA board collapses. I'm assuming one of the downstream regulators has a short, but I couldn't work out which rail/component and replaced the DKA board entirely.
Unfortunately the 5-blinks... -
Hi all,
I have the subject TV and it will work normally sometimes but suddenly go black and give the 2 red blinks blink code. When this happens, I check the power supply board voltages and all I have is the Standby 3.3V and BL_ERR 2.2V. When it's working normally, all power supply board voltages look normal and stable. I've checked the backlights with a tester and they all test good. I've also read that the 2 red blinks is a faulty power supply board, so could it be throwing up an erroneous BL_ERR?
Any Sony experts out there that can help??...
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