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Old 06-04-2015, 07:36 AM   #1
anthonystv
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Default Sony HLR board ??

Ok Guys seriously what goes wrong with a board that has 5 components on it ? to cause a TEMP ERR shutdown making me beleive its a BAL board when its not
disconeecting the HLR board the tv plays forever there is temp sens on this board there is a remote eye and a few LEDS for indicators and a light sensor ...thats it ....I suspest the remote eye is somehow causing this ?
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Old 06-04-2015, 07:37 AM   #2
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Default Re: Sony HLR board ??

MOdel Sony KDL55EX700
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Old 06-04-2015, 07:39 AM   #3
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Default Re: Sony HLR board ??

Pics of boards and overall layout
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Old 06-04-2015, 11:27 PM   #4
anthonystv
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Default Re: Sony HLR board ??

http://www.ebay.com/itm/like/221441034739 thats the board
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Old 06-04-2015, 11:29 PM   #5
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Default Re: Sony HLR board ??

symptom 7 blinks
panal temp too high
shutdown
Erronius error
unplug the HLR no more shutdown...
the prob is on this board
but what ??
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Old 06-05-2015, 10:56 PM   #6
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Default Re: Sony HLR board ??

I guess we cannot rely on the error codes per service manual if that is the case.
Check the resistance between the two legs of the MLCC (Multi Layer Ceramic Capacitor) to see if they shows low resistance.
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Old 06-06-2015, 06:01 AM   #7
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Default Re: Sony HLR board ??

Thanks for the reply what cap are we talking about ? do you have a schematic of the HLR board anywhere?? The print posted does not....
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Old 06-06-2015, 10:24 AM   #8
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Default Re: Sony HLR board ??

The MLCCC are the SMD caps rectangular shpae with light brown color.
http://www.badcaps.net/forum/showthr...highlight=mlcc

Last edited by budm; 06-06-2015 at 10:30 AM..
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Old 06-06-2015, 02:23 PM   #9
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Default Re: Sony HLR board ??

This could be big
Wish I had a Schematic
the connector to the HLR board has 1 white wire and the rest grey
the last grey wire showed me a voltage of 2.3 V while connected to the board
if this is some sort of data bus this is the issue
I removed the wire from the connector the voltage jumped to 3.3V from the BAL
the tv is on the board connected the remote works
the green led works and the red standby works
i dont know about the yellow light light ..
and the light sensor is not attached to the pin in question either
im going to let it play overnight since it has never stayed on overnight with the board attached ever the print will not break it down this detailed but I think we got something

Last edited by anthonystv; 06-06-2015 at 02:24 PM..
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Old 06-06-2015, 08:21 PM   #10
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Default Re: Sony HLR board ??

There has to be at least one wire for the VCC to run the circuit and that wire should be connected directly to some kind of filter cap/s (the filter should be connected between the VCC and GND) which I already indicated that they need to be checked out, then there should be at least one wire for the circuit ground.
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Old 06-07-2015, 08:03 PM   #11
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Default Re: Sony HLR board ??

There are at least 10 pins on the small connector
Its not Vcc everything works with this wire disconnected
I honestly dont know what it is ...but while connected its loaded down
The remote works
the green led works
the standby led works
the light sensor works
so what the hell is it ?
I left the tv on overnight if its on in the AM
it goes !!

Last edited by anthonystv; 06-07-2015 at 08:05 PM..
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Old 06-07-2015, 10:19 PM   #12
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Default Re: Sony HLR board ??

What I am saying is that if there is shorted component, the VCC feeding this board will be loaded down, this same VCC voltage may be used to also power other circuit on the main board so it cause the main board to shutdown.
"Its not Vcc everything works with this wire disconnected
I honestly dont know what it is ...but while connected its loaded down
The remote works
the green led works
the standby led works
the light sensor works
so what the hell is it ?"

So if you are not going to check the resistance of the filter caps on that board to see if the VCC is loaded down or not? You should also be able to cool it down the temp sensor with fan or freeze spray and see if the 7-BLINK will go away.
BTW, Do you mean Sony KDL-52EX700 not 55?

https://docs.sony.com/release/mdsm/988826803_sm.pdf

Last edited by budm; 06-07-2015 at 10:56 PM..
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Old 06-08-2015, 03:31 PM   #13
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Default Re: Sony HLR board ??

The tv is back together its been on for 48 hrs straight Im not touching it
you are prob right its smd cap on this board i have seen that before with remote eyes but since i dont have a print I have no idea what this does
there is no temp sensor that i see anywhere I suspect its in the CPU like a PC Its not a BAL board at all ....IM sure this fooled alot of people
posting my next question in a new thread Thanks for your help
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Old 07-16-2016, 11:00 PM   #14
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Default Re: Sony HLR board ??

Sorry to bump the old thread, but I've got the same issue with 60ex700.

Based on the responses with the last cable, and this diagram http://www.manualslib.com/manual/901...5.html?page=37,

I suspect it has something to do with the RGB sensor. It has both the capacitor and a chip. Either one could have gone wrong.
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Old 12-14-2016, 08:28 PM   #15
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Default Re: Sony HLR board ??

DenisKor, thanks for bumping it again. I may have found something on the HLR board...

I've got the same 7-blinks-won't-turn-on issue, but I'm working on a KDL-55EX711.

Same symptoms over here, where the TV seems to boot just fine with the HLR board disconnected. With the board plugged in, however, it thermal-faults within a few seconds.

After testing whether any of the +3.3V rails may have been shorted to ground through a faulty SMD component (they weren't), I tried daintily removing pins from the HLR board connector one at a time, until the TV stayed powered on with the HLR board plugged in.

Pin 11 (DEVICE_SDA) appears to be the I2C data line for the RGB sensor. I think DenisKor called it correctly, since removing pin 11 from the connector allows the TV to boot successfully.

I'm gonna try to grab a peek with my USB oscilloscope/data analyzer to see what's going on.
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Old 12-14-2016, 09:40 PM   #16
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Default Re: Sony HLR board ??

http://www.badcaps.net/forum/showthr...ard#post706697
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Old 12-15-2016, 12:06 AM   #17
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Default Re: Sony HLR board ??

Thanks to all of your posts, I was able to successfully diagnose and fix my Sony TV. Thank you all!

I wrote a play-by-play writeup covering the whole repair process. In hopes of it being found useful to others with this problem, or to those looking for troubleshooting ideas, here it is:

--------------------------------

Upon receipt of this KDL-55EX711 Sony TV, the symptoms were:
-Refusing to power on
-Standby light blinked 7 times, repeating every few seconds
-Internal relay clicked on, then off after attempting to power on

First, "Brain Off". I started by taking unit apart, looking for obvious signs of damage (burst caps, charred components, etc.)

Upon finding nothing of merit, I proceeded to scour all PCB surfaces with a toothbrush to clear any potential short-circuits.

After that didn't work, I inspected each PCB with a thermal camera during the system startup sequence. Immediately after attempting start up, multiple hot spots appeared on the main logic board. These disappeared quickly after the relay clicked off and the system refused to start.

I hypothesized the problem may be related to a power supply system, so I set about searching the 'net for a service manual, and people who have had similar problems. Most service manuals cover power supply issues, and forum posts typically abound with successful repairs of this nature.

Okay... "Brain On"

The service manual described the symptoms (red light blinking 7 times after refusing to turn on) as a "temperature error", with the cause residing either in the "BAL" main logic board, or the "HLR" daughter board containing IR receiver and status lights. The service manual for this particular TV did not contain schematics or board layouts, or go into any intimate detail of debugging the symptoms I was experiencing.

One forum post exclaimed that disconnecting the small "HLR" board allowed the system to power on successfully. Success! The TV powered on. But why?...

Continuing with my hypothesis that the problem was related to the power system, I spliced multimeters into both circuits supplying power to the "HLR" board to measure the current and voltage drawn during attempted startup. My theory was that, when connected, the "HLR" board placed an abnormally high current draw on a power supply on the mainboard. In attempting to keep up with the high load, the power supply overheated and caused the hotspots I saw with my thermal camera.

However, testing revealed nothing to indicate abnormally high current draw. In fact, during one test the "HLR" board was left connected, albeit with its power supply lines disconnected. Even when completely unpowered, the board's presence did not allow system to start up.

This indicated to me that the problem did not lie in a power supply, but in one of the data lines. After all, with the voltage supplies removed from the equation, the "HLR" board was still posing an issue for the startup sequence.

Forum posts seemed to indicate that there was a faulty capacitor, not in a power supply circuit as I had originally thought, but on an I2C communication line. Specifically, this I2C line connected to a RGB ambient light sensor on the "HLR" board.

I set about testing the capacitors and resistors adjacent to the RGB sensor for opened and shorted failure modes, but nothing seemed to indicate a problem. That was, until I stumbled upon a schematic for a different TV.

While the service manual for this unit was painfully sparse, I was able to dig up a manual for a different model of Sony TV that was in the same product line. This one had schematics, board layouts, and advanced troubleshooting instructions. The board layout and schematic for the "HLR" board was identical to the one I had, so I went with the assumption that this board was used on multiple models of TV in the same product line.

I lied. The schematic wasn't quite identical. My board had two small capacitors on the SDA and SCL I2C lines that weren't listed in either the board layout or the schematic. Perhaps the forum posts were right, and something was up with these caps.

Armed with this new information, I referred back to the original service manual's system block diagram. Interestingly enough, it showed the RGB ambient light sensor on the same I2C communication bus as... the system temperature sensor! BINGO!

New hypothesis!

A faulty capacitor on the data line containing both RGB light sensor and temperature sensor inhibited communication on the I2C bus. Because the system could not communicate with its temperature sensor, it assumed the worst and forced a shutdown. Every. Single. Time.

To test this new hypothesis, I very carefully removed the two 0201 SMD capacitors (the size of a grain of sand - no joke!) from right next to the RGB sensor. I then plugged the board into the TV... and....

Voilá!

And there you have it- A, $1,800 TV brought to its knees by a single <$0.20 part.


Post-Script

I couldn't pass up this opportunity to get familiar with the I2C communication protocol. So, I plugged in my USB logic analyzer and went to town.

Based solely on the bursts of data over the communication lines, I could determine the I2C addresses for both sensors. The RGB sensor, with its three data packets in rapid succession (one for each color), had an address of 0x2A. The temperature sensor, with single lonely packets, had an address of 0x48.

In the process of getting acquainted with the communication structure, I pointed the RGB sensor up at my LIFX smart bulb, and bathed my room in deep red light. Sure enough, the three groupings of 8-bit data frames revealed the exact color of my lights.

I can't wait to put I2C to use on my next project.

--------------------------------

TL;DR: Carefully remove the two filter caps on the SDA and SCL I2C lines, next to the RGB sensor on the "HLR" board.
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Old 12-15-2016, 10:17 AM   #18
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Default Re: Sony HLR board ??

Excellent work.
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Old 07-17-2017, 03:03 PM   #19
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Smile Re: Sony HLR board ??

I was glad to find this thread regarding the 7 blinking lights on the Sony KDL-55EX711. I have the same problem. My TV would go into the 7 blinking lights mode quite reliably after 1-5 hours of operation. I did the experiment to remove the HLR board. The TV stayed on overnight without an error. I examined the HLR board and did not find the capacitors on the I2C lines, SDA or SCL. I only saw the serial resistors.

I researched into the need for the RGB ambient light sensor. It appears to be a way to automatically adjust the backlighting for various lighting conditions in order to save power. I believe this feature can be turned off and the backlighting can be set manually and remains that way forever.

The fix that I implemented was to cut the wires (11,12) on the connector to the HLR board. This allows the remote control and LEDs to continue working on the HLR board.

Why does the temp error happen? The temp sensor is on the BAL (Main) board. The I2C bus runs to this temp sensor and the RGB ambient light sensor on the HLR card. Occasionally the temp data readings are corrupted by having these 2 devices in parallel on the bus. The corrupt readings are interpreted as the TV getting too hot and the TV shuts down and the LED flashes 7 times. Removing the RGB sensor from the I2C bus improves the data readings and no more errors occur.

I thought about buying a new HLR board on the internet but it seems the problem might come back, so I will live without the ambient light sensor and auto adjustments.
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Old 03-18-2019, 10:12 AM   #20
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Default FIXED Re: Sony HLR board ??

First, THANK YOU ALL for helping me repair my TV. Because of this thread, I was able to get to the source of the issue - the HLR board. I know this thread is old, but I wanted to provide the missing link that I was able to obtain by finding the Service Manual to my tv - KDL-55HX800 - which provided schematic diagrams plus more. Hence, I'm attaching the pics of the HLR board, and a close up of the PINs diagram. I clipped the 11th pin, and reconnected to the HLR board. The 7 red blinking lights gone! TV & remote work perfectly. NOTE: I believe that my TV had issues prior to this fix, and I DID replace the BAL board prior to clipping pin 11. Could be that the temp heat error code fried something in the BAL board. Don't know. Just went about repairs with one board at a time. Hope this helps someone else too.
Attached Images
File Type: jpg Sony_KDL-55HX800_HLR ConductorSide.JPG (62.6 KB, 23 views)
File Type: jpg Sony_KDL-55HX800_HLR PINS.JPG (54.1 KB, 26 views)
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