Lg oled55e6p-u.auswljr

[nelson6861]

Ok guys...
I got a good one for use
I have a LG OLED55E6P-U TV. I pullin it in i get the standy light. Once i hit the power button, it blinks a few times and the standby light goes out...
I have posted some pics and measurements.
On the power board i get 3.5v- POWER/On after than 0 for the rest of the connector on the power board

[Diah]

Re: Lg oled55e6p-u.auswljr

search in this forum about LG OLED and download pdf how to test SMPS on bower board. must important don't forget make the test as PWB stand alone nothings connected to it MB neither T-CON and report your result

[nelson6861]

Re: Lg oled55e6p-u.auswljr

ok i will..
so this will work on all model OLED

[nelson6861]

Re: Lg oled55e6p-u.auswljr

ok I did the power supply check using the OLED
SMPT
THE light bulb remained on....and lit.. so that mean the panel is bad...
something weird... on the power supply i hot 24v to operate the light bulb test....
but i checked P203 for 12 volts and nothing..

[nelson6861]

Re: Lg oled55e6p-u.auswljr

my results from the power supply.pdf

[Diah]

Re: Lg oled55e6p-u.auswljr

do you mean the test Nr 1 for power on short with STB you don't have 12 v on the socket ??

[nelson6861]

Re: Lg oled55e6p-u.auswljr

On P203 on the power supply board there was no 12VT and that voltage comes from main board
On P202 on the power supply board there was 24 VD

Test 1 results

1 and 3 jumpered

1) 3.0v
2) 0
3) 3.5
4) 3.7
5 3.5
6 gnd good
7 3.5
8 3.5
9 gnd good
10 gnd good
11 12
12 11.98
13 12
14 11.98
15 12
16 Gnd good
17 Gnd good
18 0
19 23
20 23
21 23
22 23
23 Gnd good
24 Gnd good


Test 2
2 and 5 jumpered
24v on power supply ON
P202 reads 24v on all the right pins and ground

Test 2 cont
P202 connected to T con board
24v good

Test 2

1/ground and 8 /24v/connected to the Light bulb

Light bulb remains lit
So does this mean the Panel is bad?????

[Diah]

Re: Lg oled55e6p-u.auswljr

it looks your PWB okay.
when you do the test 2, the jumpered 1 and 3 at test 1 should be remain in place.
bulb test if its remain lit. not always drive us the panel defect. you need now do those test one after and tell
A- no jumper at all. all socket in place and trace the 12 volts and the 24 V on the socket which goes to main boards after you plug it to wall socket.. ( this test to check if MB send signal to turn on ) it may come the 12 / 24 reading for short time.

B- do same test ( A ) .. but now only the LVDS between MB and T-Conn driver boards disconnected .. trace the 12 & 24 Volts and notice the time how long they remain on.

C- PWB socket to MB disconnected ... the 2 jumper as Test 1 & 2 in place. and trace the 24 Volts on T-CON driver. notice any Temperature goes high... and follow the line of 24 on the boards.. if there some where Open area.

D- ( Dirty Test do Only if Test A-B-C ) same result no change )

same as Test 1 and test 2 together with jumpers between Stand by and power-On & Standby and Driver On. ( but the 2 wires which bring the signal from MB of Power On & DRV On should be terminated from the socket or just remark them and cut off at the middle ) you can later solder back

with this Dirty forcing the LG to turn on... give eyes on the screen what you will have..

[nelson6861]

Re: Lg oled55e6p-u.auswljr

ok here we go..
Test A
- no 12v or 24v on main board

Test B
- no 12v or 24 v on the main board

Test C
- 24v on t-con board with set of jumpers in place.

i have not done Test D... dirty yet

[Diah]

Re: Lg oled55e6p-u.auswljr

from Test A & B we have here issue on MB. could you post clear photo on it from both side.. this model 55e6p don't know exactly the MB version & serial

BTW wait right now don't do the dirty one.

[Diah]

Re: Lg oled55e6p-u.auswljr

try to press the power on the set panel keep press and plug it in wall.. check the power on pin reading.

[nelson6861]

Re: Lg oled55e6p-u.auswljr

nothing after pressing power on the set
no 12 or 24 volts

[Diah]

Re: Lg oled55e6p-u.auswljr

nothing after pressing power on the set
no 12 or 24 volts

my last post wasn't to track 12 and 24 V on the socket ..... its about the 3.5 V which should the main boards send it to the power supply after plug it in

[nelson6861]

Re: Lg oled55e6p-u.auswljr

ok understood..
there was no 3.5v from the main board..

[nelson6861]

Re: Lg oled55e6p-u.auswljr

Im thinking there is a issue with the main board.
No 3.5 v from CPU...
i wish i had a schematic for main board thats always my weakness for these tv 's.. No schematics

[nelson6861]

Re: Lg oled55e6p-u.auswljr

i will test backlights with my led checker

[Diah]

Re: Lg oled55e6p-u.auswljr

i will test backlights with my led checker

OLED doesn't have any LED backlight..

go direct to the dirty test.. if it give asign go head to replace MB

[nelson6861]

Re: Lg oled55e6p-u.auswljr

ok i will

[nelson6861]

Re: Lg oled55e6p-u.auswljr

Performed dirty test with jumpers in and power on
and Drv_on wire terminated at MB socket halfway.

Test 1 all voltages the same on P2300 power supply

Test 2
24v on P202 on power supply
Light bulb test.. light was bright and remained on

so do you suggest a new main board

[nelson6861]

Re: Lg oled55e6p-u.auswljr

funny thing..
just checked this fuse on main board and it is blown