Sony KDL-46EX400 2 blink error code

[tibimakai]

Re: Sony KDL-46EX400 2 blink error code

I will look at that when I'm home, but I won't have time to take measurements today.
Thank you for helping me.
I have just sold last night the same exact TV. I had two.

[budm]

Re: Sony KDL-46EX400 2 blink error code

Too bad you did not take the voltage reading on Inverter_errror (oR bl_Error), LD, FB, etc.
According to the typical SONY signals training maual:
FB = 200~400mVac RMS
LD = 11~12vdc
Inverter_Error = 0V

If we can get the chassis number then I can look for the training manual.

[tibimakai]

Re: Sony KDL-46EX400 2 blink error code

I have opened it up so many times and I was swapping boards, that I got tired of it. I didn't want to mess up that one too.

[budm]

Re: Sony KDL-46EX400 2 blink error code

OK, this is how the board functions. I can explain in details as needed.

[tibimakai]

Re: Sony KDL-46EX400 2 blink error code

Thank you for now.
I will look at it as soon as possible.
Today I have to be at the kindergarten with my daughter. Parent teacher meeting.

[tibimakai]

Re: Sony KDL-46EX400 2 blink error code

Where do I find the chassy number on a Sony TV?

[budm]

Re: Sony KDL-46EX400 2 blink error code

It may be on the sticker where it shows the model number, I just want to make sure since we are not using the SCH of the EX400 but the EX402 that you have indicated it closely match your board. That way we are not looking at the wrong components and the connections if the EX402 SCH does not match your board.

[tibimakai]

Re: Sony KDL-46EX400 2 blink error code

The PS board is a APS 260(CH).

[budm]

Re: Sony KDL-46EX400 2 blink error code

Right now you can go by the notes I made in the SCH and start checking those test points I made.

[tibimakai]

Re: Sony KDL-46EX400 2 blink error code

I had a couple of minutes and measured a couple of points.
Basically the power supply turns on and then off.
384V turns on and then off. LD goes to 12V and then toward 0V. I'm not getting anything at FD.
I don't see Inverter Error, only BL_Error, which is 3.2V and not 0V.

[tibimakai]

Re: Sony KDL-46EX400 2 blink error code

Since the LD goes to 0V(from the initial 12V) it means that it entered in protection mode? This error could shut down the PS?
Also the Inverter_Error is not 0V, it's 3,2V, which is not good, am I right?
I could have a tube issue?
Should I take the panel apart?

[tibimakai]

Re: Sony KDL-46EX400 2 blink error code

I haven't had time to do those measurements yet.
I'm thinking about this TV and something doesn't add up.
I have purchased two boards until now and both times when I installed them, they worked that afternoon.
Next day or at a later time(2 weeks) when I try to turn it on, it doesn't want to turn on and throws the 2x blink error code.
I have transferred these boards into the other same exact (good) Sony TV (which I had it for a while, I don't have it any more) and it showed the same exact 2x error code.
So, if in the good TV everything is good, then why it shows the 2x error code?
But if the board is bad, then why it works the first time when I install it?
Almost sounds as incompatible board, no? If I look up shopjimmy and use there info, then it seems like I'm buying the right board.
I also do a firmware update when I get them.
To me, it seems like the mainboard is the issue. Then, how come three mainboards (one which it was the original board) show the same exact symptom?

[tom66]

Re: Sony KDL-46EX400 2 blink error code

2x error is backlight? Too many errors may build up and need clearing due to B/L fault.

[tibimakai]

Re: Sony KDL-46EX400 2 blink error code

How would you clear it?
I have a feeling that a previous error is causing this.
It doesn't give me enough time to do a reset.
As I plug in the cord, it clicks on and then off and shows the blinks.

[tom66]

Re: Sony KDL-46EX400 2 blink error code

I guess any way to clear it would be described in the service manual or from an external Sony jig -- no idea myself.

[tibimakai]

Re: Sony KDL-46EX400 2 blink error code

I can't reset anything, until the TV it's not running.
In the manual, 2 blinks means power supply failure.
I still don't know which chassy I have.
There is this manual also:

[budm]

Re: Sony KDL-46EX400 2 blink error code

Per 46ex400 manual, 2 blinks is the power supply error, but it does not have the sch, the other sch I used as a ref does not seem to match your board. What is the P/N of your power supply board, then we can find out at shopjimmy to see what other models use the same board then we can try locating the service manual or training manual for it. I look at a bunch of SONY manual, 2-blink of one chassis does not apply to another chassis, in your case, it means power supply fault, other chassis means backlights problems.

[tibimakai]

Re: Sony KDL-46EX400 2 blink error code

Check out this at shopjimmy:
http://www.shopjimmy.com/sony-1-474-...repair-kit.htm
I will have to check those transistors. I may just get these and I will replace them.
http://www.amazon.com/Sony-1-474-205.../dp/B00EPJBTZM

[tibimakai]

Re: Sony KDL-46EX400 2 blink error code

This board is available on Ebay:
http://www.ebay.com/itm/Sony-1-474-2...item3cd516ecca
Should I bother repairing the board, or just get this one? It's right here in my town too.

[budm]

Re: Sony KDL-46EX400 2 blink error code

According to SJ, 46hx701 uses the same power supply/inverter board, so here is the training manual for chassis AZ1L.
It said something about 12V regulated power supply problem that can cause 2x error. The kit has MOSFETs and Diodes which looks like they are for the PFC section, not for the 12V section.
SONY KDL-46EX405KDL-46EX400KDL-46EX500
Kit Includes: IC (1) IC6501 | Resistor (1) R6514
Transistors (2) Q6501 & Q6502 | Diodes (2) D6502 & D6503

This is good info here: These chassis use the same power supply board 147420511
http://elektrotanya.com/?q=hu/conten...assis-crossref

KDL-46EX401 AZ1N_3a-2 181106111 LTY460HM01 S-LCD 185764311 LJ9702538A 185764411 LJ9403116E A1763564A BEN 147420511 GD2
KDL-46EX402 AZ1N_3a-2 181106111 LTY460HM01 S-LCD 185764311 LJ9702538A 185764411 LJ9403116E A1763564A BEN 147420511 GD2
KDL-46EX403 AZ1L_3a-2 181106111 LTY460HM01 S-LCD 185764311 LJ9702538A 185764411 LJ9403116E A1769676A BAL T2 147420511 GD2
KDL-46EX500 AZ1L_3a-1 181105612 LTY460HJ01 S-LCD 185764311 LJ9702538A 185765011 LJ9403130H A1760331A BAL 147420511 GD2
KDL-46EX500 AZ1L_3a-1 181105612 LTY460HJ01 S-LCD 185764311 LJ9702538A 185765011 LJ9403130H A1796761A BAL (hotel) 147420511 GD2
KDL-46EX501 AZ1L_3a-1 181105612 LTY460HJ01 S-LCD 185764311 LJ9702538A 185765011 LJ9403130H A1760331A BAL 147420511 GD2
KDL-46EX503 AZ1L_3a-1 181105612 LTY460HJ01 S-LCD 185764311 LJ9702538A 185765011 LJ9403130H A1768994A BAL T2 147420511 GD2
KDL-46EX503 AZ1L_3a-1 181105612 LTY460HJ01 S-LCD 185764311 LJ9702538A 185765011 LJ9403130H A1796762A BAL(UK) hotel 147420511 GD2
KDL-46EX505 AZ1L_3a-1 181105612 LTY460HJ01 S-LCD 185764311 LJ9702538A 185765011 LJ9403130H A1769581A BAL SAT 147420511