Sony KDL-46X4500 - 6 LED Blink Code

[budm]

Re: Sony KDL-46X4500 - 6 LED Blink Code

Looking at the service manual for the 46'', this TV uses RED, BLUE, and GREEN LEDs for Lights source, not the typical WHITE LEDs.
This is not going to be easy troubleshooting.
I will not do the panel tear down yet.
Thed LED board may look something like this.
http://www.sony.co.nz/article/358578...ct/kdl-46x4500

RGB Dynamic LED
BRAVIA X Series can display the widest range of colours through the use of RGB LED backlighting which has a unique arrangement of red, blue and green LEDs.

[AlbertRoss]

Re: Sony KDL-46X4500 - 6 LED Blink Code

Correct board but as you said, we are for some reason unable to get the website for shopjimmy here in the UK?

So do I take a chance and tear down the panel or go for a new board?

[budm]

Re: Sony KDL-46X4500 - 6 LED Blink Code

OK, I found the picture of the board at shopjimmy (you may not be able to get the website in UK.
http://www.shopjimmy.com/sony-a-1553-199-a-gl-board.htm

Picture provided by shopjimmy.

[AlbertRoss]

Re: Sony KDL-46X4500 - 6 LED Blink Code

P/N for the LED driver is: 1-877-581-11.
A1553199A.

I've only disconnected the lower connector that enters into the rear panel which I presume goes to the LEDs?

[CapLeaker]

Re: Sony KDL-46X4500 - 6 LED Blink Code

Sounds like you have to tear the panel down. Bad LEDs?

[budm]

Re: Sony KDL-46X4500 - 6 LED Blink Code

It uses LEDs for backlights with that big LED driver board on the left side, I have never seen LED driver board that big before, so basically you have disconnected the LED backlights from the driver board and the 6-BLINK code went away.
I need to do some research about this model. I will download the service manual to see what kind of info it has for this TV:

Can you read the P/N of that LED driver board?

[AlbertRoss]

Re: Sony KDL-46X4500 - 6 LED Blink Code

3.38V on the BLon pin both when TV on and standby, bearing in mind I still have the 1k resistor connected so I'm probing the empty cavity from where I removed the wire. I have done the flash light on the screen but unable to see a image?

I was thinking the same thing about the CCFLs so was trying to find some kind of inverter board?

[AlbertRoss]

Re: Sony KDL-46X4500 - 6 LED Blink Code

Seems as if I've just repeated myself, I will do some more measurements.

[AlbertRoss]

Re: Sony KDL-46X4500 - 6 LED Blink Code

Disconnected lower wiring connector which I presume operates the backlights?
The top wiring connector, just above the heat sink is still connected.

The TV will now stay on with green LED light showing and the center SONY logo on the front panel remains lit. The TV is able to turn on/off either by using the remote or TV switch, it doe's not enter blink mode but still no picture or sound?

Not sure if I should now remove the 1K resistor and then try again?

[budm]

Re: Sony KDL-46X4500 - 6 LED Blink Code

Can I see the pictures of the whole back side of the unit that will show how all the boards are connected together?
My mistake to think that this model uses CCFL, it uses LED backlights so it does not have HV Inverter circuits.

[AlbertRoss]

Re: Sony KDL-46X4500 - 6 LED Blink Code

I have disconnected the lower connector that I presume operates the backlights? The top connector that I also presume is for the backlights, is still connected. The TV now stays on with green LED showing and doe's not enter blink mode. I'm now able to turn the TV on or off using both the remote and the TV switch but there is still no picture or sound?

[CapLeaker]

Re: Sony KDL-46X4500 - 6 LED Blink Code

What do you get on the BLon pin when it is unhooked from the PSU? Ever shined a good flashlight into the screen to see if there is any life on the LCD?

[AlbertRoss]

Re: Sony KDL-46X4500 - 6 LED Blink Code

Backlights do not come on during this time, have never seen any backlights, no sound or image, only the SONY logo and a few icons on the front lower panel.

[AlbertRoss]

Re: Sony KDL-46X4500 - 6 LED Blink Code

Almost, just tried it again.

Power cable connected to wall outlet and TV, switch on wall outlet (00.00V) turn on TV with panel switch, green LED shows on front panel, approx. 6 seconds later with green LED light still on, the voltage drops to 00.00V. It does this just before the TV enters blink code?

Have never seen the backlights work, also no sound or picture?

[CapLeaker]

Re: Sony KDL-46X4500 - 6 LED Blink Code

When the TV is on with a green LED, you have 0V on the INV_ERR pin.
But then there is a short blip to 3.08V and the main board goes to blinking? No backlights for 2 seconds or something?

[AlbertRoss]

Re: Sony KDL-46X4500 - 6 LED Blink Code

I have now checked all voltages again because before I had 00.00V on INV_ERR. With TV on (green LED) I have 00.00V, just a split second before TV goes in to blink mode I get a voltage of 03.08V but then drops to 00.00V?

[AlbertRoss]

Re: Sony KDL-46X4500 - 6 LED Blink Code

Removed BLon terminal from plug to main board, soldered 1K resistor from STB (rear of board) across to BLon. TV on - 03.37V, after a couple of seconds, TV went in to blink mode, voltage dropped momentary but then went back up to 03.38V.

[AlbertRoss]

Re: Sony KDL-46X4500 - 6 LED Blink Code

Ok, thanks, will do first thing tomorrow!

[CapLeaker]

Re: Sony KDL-46X4500 - 6 LED Blink Code

BLon sitting at 1V isn't enough to turn the backlights on. I should have more than 2V.
So you may have to do following:
Unplug TV. Remove the BLon pin out of the plug that comes from the main board back to the power supply (we dont want to feed back power). Next solder a 1k resistor from STB to BLon on the powe supply. Plug the TV back in and turn it on and check those voltages again.

[AlbertRoss]

Re: Sony KDL-46X4500 - 6 LED Blink Code

Readings taken just before TV goes in to blink mode:

HVR - N/U
DIMMER - 00.98V
B/L_ON - 01.00V
INV_ERR - 00.00V
BALLANCER_ERR - 00.00V
POWER_ON - 03.31V
AC_OFF_DET - 03.13V
STB - 03.37V
REG12V_GND - 00.00V
REG12V_GND - 00.00V
REG12V_GND - 00.00V
REG12V - 11.98V
REG12V - 11.97V
REG12V - 11.98V