Author Topic: Samsung PS-42E7HX/XEC Power on problem (Read 12322 times)

rotergoggo · « **on:** January 17, 2014,07:08:11 »

Hello people ,
I 'm new here and I'm from Germany .
Please forgive me for my bad english .
So now , I have a big problem with this TV !
When I turn the TV on , starts the relays on the power supply to clicking , and the power LED flashes 4 or 5 times , this game is repeated again and again.
I have renew, on the PSU, 2 transistors ( QU 801 + QU 802). After that I checked if all voltages are present. All voltages are there!
Then I found out, in a Russian forum, if on the logic board and PSU bridging of contacts that can leave the TV running in a test mode , it operates , the TV shows some test images (white, red, blue, and a white beam) this repeated again and again. After remove bridging: Clicking again .
Is the error on the motherboard? I checked the voltageregulators on the motherboard , also here are all voltages available! can you please help me? I do not know how I can find the error.
Maybe one of you ever had this error. I hope I finally expressed understandable .

Many thanks for your help .
Klaus

Mulja tv repair portal · « **on:** January 17, 2014,07:08:11 »

jordan · « **Reply #1 on:** January 17, 2014,08:18:33 »

Chassis D74A
Check or change zener diode ZD-8854 and ZD-8855 (all 1N4764),R-804-805-806 in series (all 1M),CS-814 (22uF/450V)
-Upgrade firmware

rotergoggo · « **Reply #2 on:** January 17, 2014,09:23:28 »

Hi jordan,
thanks for the quick feedback. First I have to tell the in the TV a mother board with the NR. Built D73B.
Here comes the next question: Are the two boards the same?
Nowhere have found the firmware for the tv!
Can you possibly provide me the firmware to disposal, or where can I get them?

Thanks again

regards
Klaus

Mulja tv repair portal · « **Reply #2 on:** January 17, 2014,09:23:28 »

tv tony · « **Reply #3 on:** January 17, 2014,10:12:56 »

Nothing wrong with your English. It's perfect in comparison to some posts. I will download it when I return home this evening. Welcome to the forum.
Tony Walker

rotergoggo · « **Reply #4 on:** January 17, 2014,11:49:41 »

It's all cheese with the Google translator. What should I do?
All very funny.

rotergoggo · « **Reply #5 on:** January 18, 2014,04:03:51 »

Good morning,
I own board DA74A and not DA73B!
On the boards ZD-8854, ZD-8855 and R-804-805-806 are not present!
On the power board, CS-814 I have changed!
Relaises repeated clicks!
Where can I get the firmware?
Help please!

regards
Klaus

Mulja tv repair portal · « **Reply #5 on:** January 18, 2014,04:03:51 »

jordan · « **Reply #6 on:** January 18, 2014,04:44:21 »

What is the label (code) of your power supply

rotergoggo · « **Reply #7 on:** January 18, 2014,05:53:53 »

Label DYP-42V5
Code BN96-037 43A

rotergoggo · « **Reply #8 on:** January 21, 2014,13:50:17 »

Hello,
I think the error is to be found on the motherboard, because all voltages from the PSU are available. Bridging of contacts: pson + gnd on the PSU and bridging of contacts 3 +4 on logic board test pattern appearing.
What is the error?

Does someone have an idea?

regards
Klaus

Mulja tv repair portal · « **Reply #8 on:** January 21, 2014,13:50:17 »

Mulja tv repair portal

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