Sony KDL-40XBR6

[bjorkson]

Re: Sony KDL-40XBR6

I disconnect the Tcon board from the main board, plugged power back in. PS try to kick on twice, and give me the 6 blinking light. So, no change from previous problem. Any thoughts?

[momaka]

Re: Sony KDL-40XBR6

OK, I will try this when I get home tonight. By unplugging the Tcon board and testing the tv, what does this test prove?

Sorry, I should have been more specific.

You disconnected the T-con from the main board. What I meant to ask you to do is to disconnect the panel board(s) (there may be only one or two, it varies with different models) from the T-con. This test essentially disables the entire LCD TFT matrix so that if the TV's panel or panel boards are shorted, the TV will still start and not blink.

Now, the panel boards are usually powered by the t-con board, so when you disconnected the t-con board, this also de-powered the panel board so this performed the test above as well. However, what I'm not sure about is if Sony has some kind of signal to detect if the t-con is not powering and thus keeping the TV from shutting down. That's why I asked you to disconnet the panel board from the t-con rather than the t-con from the main board (the main board is that green board on the right as shown in this picture).

So I'd say try disconnecting the panel board and keep the t-con connected. If you still get 6 blinks after this, then the problem is likely with the inverter board... unless the main board has a short somewhere, but that's less likely.

In all honesty, I haven't done many TV repairs, but I worked on a fairly recent Sony before, and it seemed to have the same layout as yours. It was just a different model. And disconnecting the panel boards from the t-con worked just fine to allow the TV to turn on rather than blink.

[bjorkson]

Re: Sony KDL-40XBR6

Ok, will try that this weekend and report back...thanks for the input.

[bjorkson]

Re: Sony KDL-40XBR6

I had a chance to test this theory out. Disconnected both tab from the Tcon board that goes to my panel with the tcon connected to my main board, still getting the 6 blinks error code, left the tab disconnected and also disconnected the tcon from main, getting the 6 blink also. I suspect it's the inverter board, have one on order, will wait until it arrived and install. Will let you guys know if that is the problem. Thanks for all your help.

[bjorkson]

Re: Sony KDL-40XBR6

Got the new inverter board in, still have the same issue with the 6 blinking lights. Anyone have any suggestion on further troubleshooting the balancer or main board?

[budm]

Re: Sony KDL-40XBR6

"Got the new inverter board" the big long board where the lamps are connected to or the one yellow board where the two inverter transformers are, just want to verify.

[bjorkson]

Re: Sony KDL-40XBR6

yes sir. well it's not new, brought in used on EBAY. The seller I brought it from is pretty reliable, with a 99.7% rating.

[bjorkson]

Re: Sony KDL-40XBR6

Here's is the blinking light diagnois failure for the Sony EBR series TV.

6 BLINKS
•If the inverter circuits fail to generate high voltage or one or more of the backlight lamps fails to light, the television will shut down and display this diagnostics error. Observing for the presence of backlighting is crucial in determining which component is likely at fault.
•If the backlights turn on before the 6X shutdown occurs, it is safe to assume that the inverter circuits are functioning and one of the lamps failed to ignite. Replacing the LCD panel is necessary. If the backlights never turn on before the 6X shutdown, the inverter has failed. If the inverter is available for replacement, replace the inverter. If the inverter is not available, replace the LCD Panel.

[bjorkson]

Re: Sony KDL-40XBR6

Sorry...SONY XBR series.

[budm]

Re: Sony KDL-40XBR6

That long board is the Balancer board, you will get 13 blinks code if the Balancer is bad dues bad sensing transformer or bad lamp.
The inverter board is the big board with two high voltage transformers, if that circuit is dead or fails, you will get 6-Blink code for inverter error.
Here is the training manual for your TV:
post 39:CTV-45 EX1 DIRECT LCD.pdf
https://www.badcaps.net/forum/showth...t=25810&page=2

Page 43:
40/46 V and W Series Backlighting
These LCD panels have a considerably different backlighting arrangement than those seen in the previous circuit descriptions. High voltage for the lamps is generated on a separate inverter circuit that is part of the power supply board. A balancer circuit has been added in addition to the inverter and will be explained separately. A basic block diagram is shown in Figure 6-4.
Inverter
Once the IP5 board receives a power on high at CN6150-1 the power supply begins generating the necessary voltages. The PFC circuit increases the rectified 160VDC to approximately 395VDC to supply power for the inverter switching transistors. The oscillator provides the necessary 41KHZ drive for the inverter switching transistors. The inverter stage outputs approximately 1000VRMS at 2 output lines that are 180 degrees out-of-phase.
Note the inverter detect stage. The detector consists of small-value capacitors and diodes to detect the AC voltage. If either AC line fails to output the inverter detect circuits will output a high to CN6154-3. This will be detected by BE Micro IC3001 on the BU board and the unit will shut down and blink the standby LED in groups of 6. The event will also be registered into the diagnostics menu for viewing when entering that mode. This will be covered in Chapter 7.
The inverter also has over-voltage and over-current detection circuits (not shown). If either circuit detects a malfunction the oscillator will stop and create an inverter detect failure.

Page 47:
40/46 Z Series Backlighting
The LCD panels in the Z series models include the KDL40Z4100, KDL40XBR6, KDL46Z4100 and KDL46XBR6. All functions previously described for the V and W series backlight circuits apply except that the inverter is not integrated with the power supply.
These models use a G4 power supply and a separate D3 board that contains the inverter circuits. The balancer circuit is identical. A block diagram of the backlighting circuits for this series is shown in Figure 6-6.

[bjorkson]

Re: Sony KDL-40XBR6

I thought the long board, farthest to the left of the TV is the inverter board and the square board, just right to it is the Balancer board. So, did I order the wrong one?

[vinceroger69]

Re: Sony KDL-40XBR6

yes basically.but you could also have a bad lamp or transformer
http://www.youtube.com/watch?v=8oZnSleucJ0

[budm]

Re: Sony KDL-40XBR6

Please download the training manual and read through it.

[bjorkson]

Re: Sony KDL-40XBR6

Oh well, I will order the balancer board. That inverter board was only $20, so Im not out much. Will try to get one and replaced. Will update you guys. Thx

I think the bad panel would give you a 9 blinks.

[budm]

Re: Sony KDL-40XBR6

You may have lamp problem as shown in the video.

[vinceroger69]

Re: Sony KDL-40XBR6

bud have you got a link to a sony training maual i have never really read many might pick up some good tips etc.

[budm]

Re: Sony KDL-40XBR6

https://www.badcaps.net/forum/showth...t=25810&page=2
post 39

[vinceroger69]

Re: Sony KDL-40XBR6

https://www.badcaps.net/forum/showth...t=25810&page=2
post 39

cheers will download and have a read through it.

[bjorkson]

Re: Sony KDL-40XBR6

Ok, balancer board came in, replaced, everything up and running. Thx for everyone's help. Cheers!