Samsung tv dead and led flashing

[Richard]

HI, I am working on Samsung set model chassis kct52b , plugged it in to the
Ac outlet , you can heard relay action and feel HV after powering the set.
There is a green led flashing. No Video or sound. Any suggesting or tips
will be highly appreciated.
Thanks........
Richard.....

sorry for me english rovni@videotron.ca



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[Jerry G.]

Check to see if the power supply is functioning correctly, see if there is
proper supply to the horiz output transistor. Check to see if there are
drive pulses to the horiz output transistor.

It is common that the horiz output transistor, power supply, and various
support components can cause this type of fault. You will have to properly
troubleshoot the set to service it.

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Greetings,

Jerry Greenberg GLG Technologies GLG
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"Richard" <rovni@videotron.ca> wrote in message
news:hXUib.59509$kY1.1202029@weber.videotron.net...
HI, I am working on Samsung set model chassis kct52b , plugged it in to the
Ac outlet , you can heard relay action and feel HV after powering the set.
There is a green led flashing. No Video or sound. Any suggesting or tips
will be highly appreciated.
Thanks........
Richard.....

sorry for me english rovni@videotron.ca



---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.520 / Virus Database: 318 - Release Date: 18/09/2003

 

[Jason D.]

On Tue, 14 Oct 2003 11:59:18 -0400, "Jerry G." <jerryg50@hotmail.com>
wrote:

Check to see if the power supply is functioning correctly, see if there is
proper supply to the horiz output transistor. Check to see if there are
drive pulses to the horiz output transistor.

It is common that the horiz output transistor, power supply, and various
support components can cause this type of fault. You will have to properly
troubleshoot the set to service it.

That's a potiential dog tv just hear me out with this tip:

Check the service mode & the eeprom first!

I have seen this happen (blank pix), replace eeprom or try to reset
blindly with the service manual (are you samsung service authorized?
Otherwise ask me by email for info on getting into it and model #), do
the presses with samsung remote to get into service mode then press
menu down key 3 times (this highlights the reset settings) then right
button once instructs tv to reset stuff. The TV LED should go out.
Press power again you should able to get pix back, Power down, do the
service mode again and check your settings against service manual.

I occasionally see this eeprom data go corrupt for any reason even
volume problems. So far 4 done to these, one of them was bad eeprom
right in the volume byte area!

I fought this samsung tv blank pix for ages and gave up on that.
While later, I got another sick samsung TV and pix does come up but
something isn't right so jumped into service mode and looked at
settings, one of them was wild. Cranked it down mid way down picture
blanked out. Kept cranking that setting down, picture popped back on.
BINGO now I know why. Sheesh.

FYI: Eeprom in samsung sets isn't updated all the time, all the
active settings that is changed is kept in memory on the zilog
microcontroller IC till plug is pulled. The micro then will panic
write those settings to eeprom. THAT was not DOCUMENTED in the
service manual. The bad eeprom (was from volume corrupting) proved
that. Resetting data fixed the soft memory where volume is located in
microcontroller's and all is fine. Also can power cycled all you
want. BUT TILL that plug is yanked, microcontroller writes good data
to the bad eeprom, the byte where volume is stuck & corrupted. Plug
this "haunted set" back in, volume control is now broken because tv
read the bad eeprom in.

Nearly all of the Samsung TV of this era using this common chassis
uses AKB even on 19" sets. Make sure tube is also good and the
eeprom. Hope this will save your time.

Cheers,

Wizard