Sharp Aquos LC-70LE732U Blinking Pattern 2 -5

[nomoresonys]

Re: Sharp Aquos LC-70LE732U Blinking Pattern 2 -5

Try the "tape cutoff" method, can put it in the search box above to find threads.

[Maya.S]

Re: Sharp Aquos LC-70LE732U Blinking Pattern 2 -5

My Sharp LC-70UD1U Screen is black and flashing, "I attached the video"

Well, I opened the back cover and as you can see in the picture, I detached 2 [L] Ribbon then TV turned ON, but detached side is white and attached side is normal
* When I attached [L] side Is goes to error code 2-5 blinking.
* I attached two [R] ribbon alone, but it goes to error code 2-5 blinking.

Does anyone have any solution?

https://youtu.be/JOXMDMceFhU

https://flic.kr/p/2mXXbTH

https://flic.kr/p/2mXWEQ9

[anthony_c]

Re: Sharp Aquos LC-70LE732U Blinking Pattern 2 -5

OK, that is fine.
I look at the service manual which does not have any diagrams, just the block diagrams, the PNL-PWR seems to be generated directly by the processor without any buffer circuit.
So at this point you just have to use it the way it is, the only bad thing is that when TV goes into standby (not powered off by the power switch) when it does not detect video signal, the T-CON will still get 12VDC which is no big deal since the TV signal will always be present any way, otherwise the 12V will be shutoff when TV is turned off.

budm, I was just reading through this post here... do you think its possible this may be the issue with my TV (same exact model) since I have never been able to get backlight OR panel power? I'd appreciate any and all help you could offer

[Simplemark1]

Re: Sharp Aquos LC-70LE732U Blinking Pattern 2 -5

Check out this thread: https://www.badcaps.net/forum/showth...=48477&page=13
Post Number 238 and 252 refers to your same model with the same blinker error code. Hope that helps you.

[enihsnus]

Re: Sharp Aquos LC-70LE732U Blinking Pattern 2 -5

Also - i get 0V on both PD 1 & 2

[enihsnus]

Re: Sharp Aquos LC-70LE732U Blinking Pattern 2 -5

Hey all - i have a Sharp lc-70ud27u with the same error code. i bought this off of someone real cheap and they said that the sound continued to work but no picture. The unit when powered on has no backlight at all. when i jump 2 pins on the PD connector (not exactly sure which 2 but they are pin 4&5 on the top side) on the main board side i can force the backlight to come on. at this point i cant tell where the issue is, main board or power board. any help woud be appreciated

[Aggie2012]

Re: Sharp Aquos LC-70LE732U Blinking Pattern 2 -5

Hi guys,

Im new to TV and tech repair but I'm pretty handy, I've been following this thread to try and solve a similar issue with a Sharp LC-70LE650U I found in the trash. It was giving me the 2/5 blinking error code. I followed the steps on the Tech TipsPDF that RJ posted on page 1. I took off both ribbon cables from the TCon got the backlights to light up didn't see any physical damage to the panel. Reattached one ribbon (right side) and got half the screen to turn on, no cracks or damage visible meanwhile the blinking error code is NO longer happening. The tech tip sheet says if no physical damage is visible then there is a legitimate panel failure. I'm not sure what that means but I disconnected the right side and connected the left side and backlights don't come on at all and the blinking error code is back. Checked voltage from PD 1 at the main board to PL on the TCon board while both ribbon were disconnected and I got 12vdc at PL1&2 but 0 at 3&4. Checked voltage while left ribbon was connected (and error code blinking) and got 0vdc on PL3&4 and .03 on 1&2. Voltage check with right ribbon connected and left disconnected (no error code) and got 12vdc at PL1&2 and 0vdc at 3&4. With both disconnected (no error code) I get 12 at 1&2 and 0 at 3&4.

So I guess my question is, is this a TCon issue or a panel issue? Or do I need to check something else.

JW
Texas

[rted]

Re: Sharp Aquos LC-70LE732U Blinking Pattern 2 -5

Hi, my first post. Found this thread. I have Sharp 70" TV, model LC-70LE847U. I believe the tcon board is defective based on what I've read here, research, and testing you suggested in this thread. My tcon board is model DUNTKF961FM01, it has 4 ribbons to the panel which I found easy to remove. There is one other cable however, I believe called LVDS, which I can't figure out how to get loose. Attached is a picture. Any help is greatly appreciated, thanks!

In my case I replaced the PD unit to fix the problems.

[budm]

Re: Sharp Aquos LC-70LE732U Blinking Pattern 2 -5

Before trying to remove the cable, what DC Voltages do you have on that PL connector of the T-CON board?
What Voltage testing have you to done so far?
BTW, the cause of the problem in this thread is due to the main board not sending the PL_ON signal to turn on the SWITCHED LDO regulator to supply the 12V to the PL connector on the T-CON board to run the T-CON.

[truearrow]

Re: Sharp Aquos LC-70LE732U Blinking Pattern 2 -5

Hi, my first post. Found this thread. I have Sharp 70" TV, model LC-70LE847U. I believe the tcon board is defective based on what I've read here, research, and testing you suggested in this thread. My tcon board is model DUNTKF961FM01, it has 4 ribbons to the panel which I found easy to remove. There is one other cable however, I believe called LVDS, which I can't figure out how to get loose. Attached is a picture. Any help is greatly appreciated, thanks!

[rted]

Re: Sharp Aquos LC-70LE732U Blinking Pattern 2 -5

Hi,

I solved the problem by purchasing a new power board. That's the best long term fix.

[nomoresonys]

Re: Sharp Aquos LC-70LE732U Blinking Pattern 2 -5

.

[speter]

Re: Sharp Aquos LC-70LE732U Blinking Pattern 2 -5

I have the same error (2 -5) I couldn't start a new thread, but now I can.
I couldn't delete this post.

[rted]

Re: Sharp Aquos LC-70LE732U Blinking Pattern 2 -5

After re-reading the problem. Your problem is that there is no voltage to turn the q7120 on, correct? that would mean the regulator is not necessarily bad. but you are just bypassing it to make the tv work.
I suspect this ic is installed with the back facing the heatsink and the front (with the number) is facing the board, so you have 13.3 on the Vin and 0 on Vout and pin 4 control only has .13 so the problem is why there is no control voltage to turn on the ic not that the ic is bad
It looks like you need at least + 2 volts on pin 4 to turn on the ic.

Hi R_J, this is rted regarding the link below. Regarding your last message, would really appreciate it if you can help me resolve why there is no control voltage to turn on the IC. I know your time is valuable so maybe I can make it worth your while to help me resolve the problem.

https://www.badcaps.net/forum/showthread.php?t=45671

[rted]

Re: Sharp Aquos LC-70LE732U Blinking Pattern 2 -5

Thanks for reviewing the thread. Yes you are correct about low voltage on pin 4. This is why I physically wired a switch between pin 3 and 4 to bypass the low voltage problem. That worked for a while but now it doesn't.

How can I trace back the problem? I don't have a schematic to follow. Will the problem still be on the power board?

Really appreciate your taking time to help.

RT.

[R_J]

Re: Sharp Aquos LC-70LE732U Blinking Pattern 2 -5

After re-reading the problem. Your problem is that there is no voltage to turn the q7120 on, correct? that would mean the regulator is not necessarily bad. but you are just bypassing it to make the tv work.
I suspect this ic is installed with the back facing the heatsink and the front (with the number) is facing the board, so you have 13.3 on the Vin and 0 on Vout and pin 4 control only has .13 so the problem is why there is no control voltage to turn on the ic not that the ic is bad
It looks like you need at least + 2 volts on pin 4 to turn on the ic.

[rted]

Re: Sharp Aquos LC-70LE732U Blinking Pattern 2 -5

Hi R_J,

On the TVTech site I noted the part # KIA78R12API is a fix for model numbers LC-60LE640U, LC-60C6400U, LC-60LE650U.

Please confirm this part will work for my TV model number LC-70LE732U.

Your help is greatly appreciate.

RT

[rted]

Re: Sharp Aquos LC-70LE732U Blinking Pattern 2 -5

Hi R_J

Thanks for the reply.

I did lift the heat sink up expecting to find a number but all of the parts are blank. If I knew what type they were I could check to see if there OK. Should I replace all of the drivers/regulators located on the heak sink?

[R_J]

Re: Sharp Aquos LC-70LE732U Blinking Pattern 2 -5

This guy seems to have it , looks like it is a KIA78R12API, also KA78R12 (case TO-220F-4L) lift your heat sink and read the number
http://www.tvtechparts.com/DPS162-KI...rd_p_5140.html

[rted]

Re: Sharp Aquos LC-70LE732U Blinking Pattern 2 -5

OK, I trace out the bottom side of the power supply board to see how the PNL-POW and the PNL12V are connected and generated.
As you can see, you can put the meter on JUMPER J7058 to test the PNL-POW signal.

The PNL12V output is from the electronics switch that is turned on by the PNL-POW signal.

POWER SUPPLY BOARD PD connector pinout:
PD-1-2 = PNL12V
PD-3-4-9-10-11-12 = SGND
PD-5-6-7-8 = UR13.2V
PD-13 = AC-DET
PD-14 =PS-ON
PD-15 = BU5V
PD-16 = PNL-POW
PD-17-18-20 = N.C.
PD-19 = DIMMER
PD-21 = OFL
PD-22 = ERROR
PD-23 = NOT USED
PD-24 = STB

Hi BUD M,

You helped me solve a problem with the subject title over a year ago. The TV has now gone to the blinking pattern 2 - 5 once again. I would like to replace the Q7120.

Would you be so kind to send me the part number of Q7120 or tell me where I can find the schematic so I can replace it on the board.

Your kind reply is greatly appreciated.

RT