Samsung UE40ES5700S blinks 5x2 in loop

**RJARRRPCGP** · 02-15-2018, 08:59 AM

Re: Samsung UE40ES5700S blinks 5x2 in loop

I can't recall getting word of Samsungs giving blink codes. It seems that both Samsung and LG, when there's a faulty part, just keep cycling...

They seem to lack blink codes, unlike Sharp, Panasonic and Sony.

More likely a power-on-and-power-off loop. Solder joints are suspect when there's symptoms like that...

**thoma** · 02-15-2018, 10:22 AM

Re: Samsung UE40ES5700S blinks 5x2 in loop

Disconnect power/ main What happens?

https://de.scribd.com/doc/232113793/...ng-Reset-Issue

**thoma** · 02-15-2018, 10:33 AM

Re: Samsung UE40ES5700S blinks 5x2 in loop

Disconnect power/ main What happens?

https://de.scribd.com/doc/232113793/...ng-Reset-Issue

**fluxflux** · 02-15-2018, 04:40 PM

Re: Samsung UE40D5700RSXZG blinks 5x2 in loop

Dear all,

fist of all, I'm very sorry as I've made an mistake by naming the Model.

It's an Samsung UE40D5700RSXZG. The other one is also at my workbench.

Lesson Learned: DON'T TRUST YOUR MEMORY :-)

@thoma:

The following happens:

Disconnect the main from the PSU - no blink -> logical as the status LED is connected to the main.
Disconnect the tcon from the main - blink
Disconnect the backlight from the PSU an keep the main connected - blink

Overall there is no backlight.

I've measured the voltages.

There are two scenarios;

Scenario 1: Mainboard disconnected:

CNM803

1 0,30
2 -
3 0,30
4 -
5 0,30
6 -
7 0,30
8 GND
9 GND
10 GND
11 -
12 5,31
13 -
14 3,14
15 -
16 -

Voltages are stable.

Scenario 2: Mainboard connected:

NOTE: The voltages 1,3,5,7 and 14 cycling from 0 to the given Voltage in sync to the LED blinking.

CNM803

1 0,27
2 -
3 0,27
4 -
5 0,27
6 -
7 0,27
8 GND
9 GND
10 GND
11 -
12 5,31
13 -
14 3,38
15 -
16 -

The 13 Volts are not there

Kr

Flux

Attached Files

**budm** · 02-15-2018, 07:24 PM

Re: Samsung UE40ES5700S blinks 5x2 in loop

https://www.badcaps.net/forum/attach...9&d=1518734402
It looks like you count the pin of the CN803A (not 803) wrong, see the chart for the CN803A.
CN803A is 16-pin, CN803 is 14-pin.
You have CN803A so no way you can have 5.31V at pin 12 because pin 12 of CN803A is GND!
The exposed pins you are seeing on the top side of the board are ODD number pins, the EVEN number pins are located on the bottom side of the board.
So you need to retest the Voltages of all those pin again and you MUST pin down the pin names and follow by the Voltage readings so we can easily see if the Voltages are correct or not.
I am not sure if this BN44-00423A has pull-up resistors for self test or not, I have to look at my notes later.

**fluxflux** · 02-16-2018, 02:54 AM

Re: Samsung UE40ES5700S blinks 5x2 in loop

Hi budm,

thank you and apologize for confusion. You are right - of course :-)
I've removed some of the glue and now the layout is clear to me...

Here are the new measurements.

CNM803A

PW ON and Main Disconnected

GND 1 GND see picture
N.C 2 0,00 see picture
B13V 3 0,30
PWM_DIM 4 0,00 - 0,01 (alternating)
B13V 5 0,30
N.C 6 0,00
Vamp 7 0,30
BLE_On/Off 8 0,00
Vamp 9 0,30
GND 10 GND
GND 11 GND
GND 12 GND
B5V 13 0,00
A5V 14 5,31
B5V 15 0,00
Power On/Off 16 3,14

PW ON and Main Connected

GND 1 GND see picture
N.C 2 0,00 see picture
B13V 3 0,25
PWM_DIM 4 0,00 - 0,01 (alternating)
B13V 5 0,25
N.C 6 0,00
Vamp 7 0,25
BLE_On/Off 8 0,00
Vamp 9 0,25
GND 10 GND
GND 11 GND
GND 12 GND
B5V 13 0,00
A5V 14 5,31
B5V 15 0,00
Power On/Off 16 3,38

If POWER ON the voltages 3,5,7,9 and 16 alternating from 0V to the given voltage in sync to the LED blinking (reastart).

Thank You

flux

Attached Files

**thoma** · 02-16-2018, 03:14 AM

Re: Samsung UE40ES5700S blinks 5x2 in loop

http://forum.iwenzo.de/samsung-d-ser...p--t65089.html

http://forum.iwenzo.de/topic.php?t=5...ight=ue40d5700

**fluxflux** · 02-16-2018, 03:47 AM

Re: Samsung UE40ES5700S blinks 5x2 in loop

Hi thoma,

thank you.

I've already tried the EEPROM reset with no success.
Also the freezing of IC1302 did not helped. Will try it again later the day.

Will check the other sugestions in the
links.

Kr

flux

**thoma** · 02-16-2018, 03:57 AM

Re: Samsung UE40ES5700S blinks 5x2 in loop

http://www.repdata.de/wbb2/index.php...threadID=82033

**Moreno83** · 02-16-2018, 04:48 AM

Re: Samsung UE40ES5700S blinks 5x2 in loop

Did you try to just apply mains to the power supply with mainboard disconnected? I think you missed that option if i look at what you did ....

Normally the backlight should turn on. These models are notorious for bad BGA Solder under the cpu.

EDIT : I read mains not main....

Let the tv blink and heat up the powersupply for about 2/3 minutes with a heatgun/hairdryer. See if it turns on by itself , i had that with 32"version and this powersupply.

**fluxflux** · 02-16-2018, 05:59 AM

Re: Samsung UE40ES5700S blinks 5x2 in loop

@Moreno, I will try that. Also will try to reflow the CPU as I have a T-862++

@thoma: Will check the content in the link.

Intresting:

I've also tried to do the EEPROM reset again. I've noticed the following: If I let the pins shorted and unplug the power cord the system keeps blinking (discharging of caps?). As soon as I remove the wire the system stops blinking.

Kr

flux

**fluxflux** · 02-16-2018, 06:05 AM

Re: Samsung UE40ES5700S blinks 5x2 in loop

@Moreno, I will try that. Also will try to reflow the CPU as I have a T-862++

EDIT: Reflowed the CPU without success - still blinking.

@thoma: Will check the content in the link. (btw. the PSU is not clicking)

Intresting:

I've also tried to do the EEPROM reset again. I've noticed the following: If I let the pins shorted and unplug the power cord the system keeps blinking (discharging of caps?). As soon as I remove the wire the system stops blinking.

Kr

flux

Attached Files

**budm** · 02-16-2018, 10:26 AM

Re: Samsung UE40ES5700S blinks 5x2 in loop

CNM803A

PW ON and Main Disconnected

GND 1 GND see picture
N.C 2 0,00 see picture
B13V 3 0,30
PWM_DIM 4 0,00 - 0,01 (alternating)
B13V 5 0,30
N.C 6 0,00
Vamp 7 0,30
BLE_On/Off 8 0,00
Vamp 9 0,30
GND 10 GND
GND 11 GND
GND 12 GND
B5V 13 0,00
A5V 14 5,31
B5V 15 0,00
Power On/Off 16 3,14

You do have PS-ON (POWER ON/OFF) of 3.14V so the switched 13V, B5V, and the Vamp Voltages should be present.

I do not understand this statement "If POWER ON the voltages 3,5,7,9 and 16 alternating from 0V to the given voltage in sync to the LED blinking (reastart)."
What do mean by 'IF'?

**fluxflux** · 02-16-2018, 10:44 AM

Re: Samsung UE40ES5700S blinks 5x2 in loop

Hi Budm,

I'll try to make a video and upload it as a ZIP-file.

From my memory :-) ...
When the cycle of 10 Blinks is done, the TV trys to start.
Indiation of this beavior is as the litle Front-LED lights up for about 3 seconds and I hear an realy silent electical "zzzzz". During that moment the Voltages are at the highes level. During the Blinking they drop to 0V.

Kr

flux

**budm** · 02-16-2018, 10:58 AM

Re: Samsung UE40ES5700S blinks 5x2 in loop

But if you do not have the power supply board connected to the main board, does the PS-ON Voltage go up and down?
Right now based on your Voltage readings of the power supply board without main board connected, it shows you have at least the problem with the power supply board due to lack of switched Voltages.

**fluxflux** · 02-16-2018, 01:12 PM

Re: Samsung UE40ES5700S blinks 5x2 in loop

Hi Budm,

Mainboard >connected< Power Supply = Voltage goes up and down (see video)

Mainboard <disconnected> Power Supply = Voltages are stable

If you turn up the volume you will hear the zzzzzzzz every thime the voltage goes up. (sorry about the backgroud fan)

kr

flux

Attached Files

**budm** · 02-16-2018, 01:49 PM

Re: Samsung UE40ES5700S blinks 5x2 in loop

Based on your readings without the main board connected; At this point you need to get the power supply board to work correctly first which means it should have the B5V, Vamp (about 13V), and the B13V when running the power supply board by itself.
After that you will work on the main board.

**fluxflux** · 02-26-2018, 03:55 AM

Re: Samsung UE40ES5700S blinks 5x2 in loop

hey,

I've replaced the PSU as I got a used for 20€ inc. shipping.
The seller is a semi-professional "Used TV Hardware Guy" and seems to be trustworthy.

The TV worked for approx. 5-6 min.

What happend:

1 Samsung Logo appeared
2 TV Started.
3 No Sound available (Tested via FireTV Stick)
4 Reset the system via menu options (picture and sound).
5 TV still works for ~3 Min.
6 TV flickers.
7 TV goes black.
8 No backlight and no picture using the flashlight trick.
9 TV still receives commands via remote - little front LED blinks if I push buttons.

Restart of the system = Black Screen, TV still receives commands via remote - little front LED blinks if I push buttons..

If I detach the Mainboard from the PSU the Backlight starts.

Did I killed the Mainboard during my previous "reflow", "freezing" activities?

kr

FluxFlux

**nomoresonys** · 02-26-2018, 05:36 AM

Re: Samsung UE40ES5700S blinks 5x2 in loop

Maybe retest the new powersupply voltages with everything connected, see if your bl on voltage is there.

Samsung UE40ES5700S blinks 5x2 in loop

Samsung UE40ES5700S blinks 5x2 in loop

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