Re: 55EC930V Power On - Power Off failure
I gave up on the TV, all boards seem to be fine and working and I noticed that the TV had already brun in. I tried what these two guys tried with the OLED panel, to detach it from the frame and it easily cracked, it is not as flexible as they said. Anyhow, it was at least fun try to fix it, not everything is fixable.
Thanks @Diah for your support!
nixmoon
Member
Last Activity: 11-16-2019, 09:10 AM
Joined: 10-15-2019
Location: Berlin
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Re: 55EC930V Power On - Power Off failure
In this video [URL="https://www.youtube.com/watch?v=Mvghv-Ee5-E"]https://www.youtube.com/watch?v=Mvghv-Ee5-E[/URL] they tear apart such a model, the support frame looks the same, I am wondering if something is wrong with the PCB of the panel because always before it freezes the panel will went dark on the right side. I already exchanged the ribbon cables, still the same.Re: 55EC930V Power On - Power Off failure
In this video [URL="https://www.youtube.com/watch?v=Mvghv-Ee5-E"]https://www.youtube.com/watch?v=Mvghv-Ee5-E[/URL]Leave a comment:
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Re: 55EC930V Power On - Power Off failure
I did the test, but as these light bulbs have only 5W, they will only draw ~0,416A from a PSU with a rating of 15A at 24V => 360W. This means the bulb will only draw 2,77 % of the rated current/load. I measured the current and it was 580mA and stable and I only have 1 bulb, no chance to get close 20% or 50% of the rating.Leave a comment:
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Re: 55EC930V Power On - Power Off failure
Never worked for me, old and new board won't turn on when LVDS is disconnected, always same, relay on klick and relay off klick after 3 seconds. I guess the controller is waiting for the feedback signal from T-Con.
No, I only used a LED, but I checked the voltage when it was working and when it was in failure mode (horizontal lines on the screen). Voltage was always stable.
What do you mean? For what should I look?...Leave a comment:
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Re: 55EC930V Power On - Power Off failure
Today the replacement board arrived and as I expected, same problem as before. Sometimes I am able to turn on the TV to power only mode but it does not last long. First time around 30 seconds until the right side of the panel turns dark and then a freeze with horizontal stripes, as you can see at my first post.
Second time around 10 seconds and now again on off klick of the relay after 3 seconds.
It seems that some part of the panel electronic which is covered by the rear frame might be damaged.
Is...Leave a comment:
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Re: 55EC930V Power On - Power Off failure
I know that it wasn't the correct way, but I baked the MB in the oven for around 20 min, a friend fixed is graphic board that way, but for me still the same result. MB and TV still doing the same, after power on, it will power off.
Replacement board has not arrived yet...
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Re: 55EC930V Power On - Power Off failure
I now disconnected the 24VS (3 lines of PSU to MB connector) and tried to power on via RC and Power Only, both time same result. Relay switches off after 3 seconds.
When I disconnect 24VD (Cable between PSU and T-CON) the same result.
I am still waiting for the replacement MB...Leave a comment:
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Re: 55EC930V Power On - Power Off failure
Ok, I thought these are different circuits, because the 24V for AMP are already on when PWR ON is set while the other 24V for T-CON are switched via DRV ON and on the PSU it looked for me as two separate circuits. Anyhow I will disconnect the 24V lines from the PSU MB connector plug and try again.
Right now I am on a business trip, hope the new MB will be there when I am back on Wednesday. Will try it when I am back.
Thanks for the support and patience!
...
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Re: 55EC930V Power On - Power Off failure
I think the panel is broken, always shortly after the DRV-ON signal is set, the T-CON will set BURNT_DET/T_CON_SYS_POWER_OFF/LED_R which will give IC3000 the command to shut down the whole TV Set. Please correct me, if I am wrong!
I will have a last try with another MB from ebay next week, but my hopes are low.
Although it happened a few times now that the T-Con didn't set the signal but only when I turned the TV on via POWER_ONLY mode, but I had now picture on the screen, it stayed black. No sound from external...Leave a comment:
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Re: 55EC930V Power On - Power Off failure
How do I kill the 24 V?
I checked all voltages (1.1V; 1.5V; 2.5V; 3.3V; 3.5V; 5V; 12V; 24V) and regulators on the MB, everything is stable for the 3 seconds the relay is on.
Regarding the seconds test you mentioned, it will have no effect, because the MB never gives the DRV-ON signal so 24V is never applied to T-CON....Leave a comment:
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Re: 55EC930V Power On - Power Off failure
Sorry for the misunderstanding, I ment to say, without 230V power supply connected to the TV Set.
When I try to turn it on with RC it will always power off after a few seconds and in that time no USB flashes or IN_STOP command worked, tried it already several times before.
Is there any way to boot the MB without LVDS connected to have for example enough time to check all voltages on the ICs on the MB?...Leave a comment:
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Re: 55EC930V Power On - Power Off failure
Just to make it clear for me, next test I should try is:
- Disconnect LVDS cable (without power supply connected to the Set)
- Connect power supply, wall plug
- Push power button on Remote and within the 3 seconds unplug from wall
- Replug to wall and Set should stay on, so I can check sound from input, USB stick LED and SPDIF light.
I will do that as soon I am back home!
Thanks so far for the support!
BTW I checked the M14 Power SEQUENCE mentioned in the Schematics...Leave a comment:
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Re: 55EC930V Power On - Power Off failure
Problem is that the TV turns off after around 3 seconds by itself, even without LVDS cable connected. LED of the USB stick does not lit up during that period of time and no sound.Leave a comment:
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Re: 55EC930V Power On - Power Off failure
I checked his thread, but I think it is not the same. I get the test sequence when forcing both DRV ON and PWR ON signals while MB is connected. When this works I can normally switch to Powe Only mode with service RC signal, but still needs the DRV ON jumper.
I check again with a scope the start up sequence I found in another thread and the IC3000 holds the pin19 down all time so in this condition the 24V for T-Con will not be set in normal condition, BURNT_DET is also low, not causing the IC3000 to withhold the 24 V.
...Last edited by nixmoon; 10-24-2019, 02:52 PM.Leave a comment:
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Re: 55EC930V Power On - Power Off failure
Thanks for the advice, after trying everything mentioned here in the forum that was my last idea and I thought I made some progess finaly seeing the panel working. Maybe I was wrong.
Back to the problem, when I check the start up sequence I see the MB just giving the DRV-ON signal to turn on the 24V rail for the T-Con and direct after that it will power down. That was the case since the beginning. Maybe I need to check the feedback signal from the T-Con, will do that next.
Anyhow my main concern and question...Leave a comment:
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55EC930V Power On - Power Off failure
Hi Guys,
I know there are some other threads, but it seems the faults are little different, that is why I opened another thread, hope that was ok!
I have a little problem with my LG 55EC930V TV Set. I bought it on ebay for 80 Euro. The relay inside the TV will klick, logo on the bottom will be lid and after ~3 seconds I hear another klick and logo fades out.
I checked the PSU and when using both jumpers, 3,5V to DRV-On and PWR-ON, all voltages are ok and in range.
Then I tried to set the PWR-ON jumper (DRV-ON was set all time) while all boards... -
Re: New Members - please post your introductions here
Hi!
I'm Nick. Bought a broken LG 55EC930V OLED TV but I am not able to get it fully running, looking for some help here! Many thanks in advance!Leave a comment:
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