SAMSUNG UE46C8000 LED/SMART TV - Frequent Freezing and Red LED Blinking Issues

Hello

I have Samsung UE46C8000, which quite often hangs after a few minutes of work (although sometimes it works OK all day). When it hangs, the information shows that no channels are recorded, and the red LED blinks about 2 times / sec (very short flashes). The buttons on the remote control react rather randomly to local ones too. Turns off after long holding OFF on the remote control. When we turn it on immediately, it is still "suspended", but if we wait more than about ten seconds before switching it on again, it will normally float and after some time it will hang again.

Power on the signal board OK, clean and nothing happens to them when it hangs. The only thing I noticed is the increased and some chaotic traffic on I2C to the backlight driver (when it is "suspended"), although even with the complete disconnection of the I2C, it freezes.

Has anyone met with something similar?

Greetings.
PG

In my opinion it's the mainboard's fault, I used to have a similar problem. Replacing the disc has ended the problem.

Hello

I wanted to avoid replacing the main board, but it probably can not be, because the client depends on the time.

Taki main Link_ssb:UE46C8000-BN94-02755B

Sprawdz taki scalak opisany jako IC1014 (Microprocessor-Supervisors) z serii PT7M7xxx czyli po prostu układ RESET z "dodatkową funkcją nadzoru " (Watchdog functions)
Monitoruje napięcia zasilania procka .
http://www.dz863.com/datasheet-826589563-PT7M7803_Microprocessor-Supervisors/

Quote:

Microprocessor family PT7M7xxx (microprocessor) is the supervisory scheme aimed at increasing the reliability and accuracy of supply chain systems and microprocessors. These devices reduce the complexity and number of components required for control functions and battery.
Main features are:
1. Asserting reset output during power-up, power down, and brownout conditions for the system microprocessor;
2. Detection of a power failure or low battery with 1.25 threshold detector;
3. Watchdog function;
4. Manual reset.

Zależnie od literki na case nadzoruja rózne nap. od 4.36 (L) - 2.20V (Y)

Są dwie wer. z ujemn. oraz dodatnim wyj. sygnału
-lewa fotka z Ujemnym


Przykład włączenia

Hello, does this mean that you have a problem with this IC? I'm not at the workshop right now so I can not check it out.
Do you have a schematic for this disc?

And if it's already said, which version is sitting there and does this scheme have anything to do with the case?

greetings

I do not know what ver. depends on the solution on the board. This was the 2010 model.
* once on the wallpaper in sewis Link_read for curiosity
or Link_to see SM

Look at Link_thing with E_tanya (manual_47MB)

I invented something on pages "made in china", but the problem with translation.

Quote:

Chassis: N79A
Model:
EU C7 ** * 00W *
UE ** C8 ** 0X *
AU ** * C7000W
C8000X AU ** *



Chassis: N96A
Model:
EU ** * C6000R
EU ** * C6200R
EU C650 ** * U *
EU ** C67 * S * 0

Chassis: N96A
Model:
UE32C66 **** UE37C66 **** UE40C66 **** UE46C66 ****
UE32C68 **** UE37C68 **** UE40C68 **** UE46C68 ****

In the 46 "model, two types of 8bit / 10bit matrices were used

Quote:

ASSY LCD-AMLCD (SAMSUNG)
LCD PANEL; LTF460HQ01, SSEZQS, 8bit, 46,16.7

ASSY LCD-AUO
ASSY PRODUCT LCD; T460FBE1-FA, SLL7CA1,10b

For this platform, Valencia has a chassis

Quote:

Chassis: N84A
Model:
LE32C63 * LE37C63 * LE40C63 * LE46C63 *
LE32C65 * LE37C65 * LE40C65 * LE46C65 * LE55C65 *
LE32C67 * LE37C67 * LE40C67 * LE46C67 * LE55C67 *

Chassis: N86A
Model:
LE40C750R2 * LE46C750R2 *
LA46C750R2F LA55C750R2F

on the BGA chipaxch described as SDP92 mainproc./ SDP94 videoproc.
No data about them.
It is known only from the diagram and photo. below what he is responsible for

Quote:

SDP95 and SDP96 ---- Luna = SDP95 240Hz, and SDP96 for Local Dimming

In 3D TV with HDMI ver.1.4 and ARC there is a new IC from Silicon IC-VIDEO SWITCH; SiI9389CTU Link
1001-001627

I forgot to describe the solution - trivial
Damaged was the controller in the touch panel that randomly controlled the TV ...