Re: Proscan elite EP 5585 Turn On but led driver no voltage ..
I tested 2 led string is 94V each , the same voltage both and the backlight is bright
mydang
Senior Member
Last Activity: 05-06-2022, 11:33 AM
Joined: 08-14-2018
Location: london
-
Re: Proscan elite EP 5585 Turn On but led driver no voltage ..
led voltage drop from 124 v to 0v even disconnected to led power supply
problem is from power supply led driver
Thank RJ...Last edited by mydang; 09-07-2018, 12:04 PM.Leave a comment:
-
Proscan elite EP 5585 Turn On but led driver no voltage ..
Hi! all and Budm
Led TV Proscan elite EP 5585 is problem... Tv turn on green light is stable
tv screen flash then black
checked led driver both way connected and disconnect to led string when first tv turn on 124 volts at led driver channel, then voltage drop to 0 volt 100% problem with power supply produce led voltage
Because I already checked led backlight with led tester backlight bright and voltage show on tester 94 volt 100% no problem with led backlight
I just all professional help me what component cause Tv turn on i have 124Volt but drop... -
Re: Lg tv 47ln5750 led driver is problem ..
replaced 2 led work great,,, Thank budm and all people " helpLeave a comment:
-
Re: Lg tv 47ln5750 led driver is problem ..
how is about i can change led bulb instead of buy led string ?...Leave a comment:
-
Re: Lg tv 47ln5750 led driver is problem ..
If you do not see backlights when test with tester, it means the LED string has open circuit , not shorted
what do i do from here to fix open circuit led string ? ThxLeave a comment:
-
Re: Lg tv 47ln5750 led driver is problem ..
get 0v if i test - and +...Leave a comment:
-
Re: Lg tv 47ln5750 led driver is problem ..
I have this one i already
*tested left led -+pin i see baclight up
*tested on the right-+pin led i donot see backlight
i think one or more leds on the right - and + pin shorted
how is your idea?
Thank B...Last edited by mydang; 08-23-2018, 07:47 AM.Leave a comment:
-
Re: Lg tv 47ln5750 led driver is problem ..
yes with chassis gnd connected to test lead volt meter...Leave a comment:
-
Re: Lg tv 47ln5750 led driver is problem ..
Thank you i learn more thing from you
...
Leave a comment:
-
Re: Lg tv 47ln5750 led driver is problem ..
I think i will use universal le drive to test it before i open to test led backlight...Last edited by mydang; 08-22-2018, 10:52 PM.Leave a comment:
-
Re: Lg tv 47ln5750 led driver is problem ..
with led connect 115v then drop 78v
without led connect 168v then drop 78v...Leave a comment:
-
Re: Lg tv 47ln5750 led driver is problem ..
with led connected test each time one 115v then drop 78v the other led the same 115 then dop 78v...Leave a comment:
-
Re: Lg tv 47ln5750 led driver is problem ..
Then another test will be without LED connector in place and then same procedures on the two LED+ pins
This test TV on show 168volt then drop 78v and stay there ThxLeave a comment:
-
Re: Lg tv 47ln5750 led driver is problem ..
yes when tv turn on i see volt up 115v then drop 78v stable no change when 78V...Leave a comment:
-
Re: Lg tv 47ln5750 led driver is problem ..
one thing i do not know why ..
tv on
negative test lead to pin- ,, positive test lead to + when tv turn on i see 54v appear then disappear not even haft second
-TV Standby no volt at pin+ and -
ThxLeave a comment:
-
Re: Lg tv 47ln5750 led driver is problem ..
your idea is what wrong or some backlight led burned?
ThxLeave a comment:
-
Re: Lg tv 47ln5750 led driver is problem ..
yes 4 pins at led connector 2 - and 2 +
--TV on
negative test lead to chassis , positive to pin + voltage is 78V for both
--stand by no voltage led pin at the connector
thx budm...Leave a comment:
-
Re: Lg tv 47ln5750 led driver is problem ..
HERE for you and people please take a look and help
Detail for you take a look WHEN TV ON
left and right led driver is 78V stable
GRD---
NC---24V
12V---12V
GRD
24—24V
GRD—
PDIM2—1.13V
PDIM1---1.13V
DVR-ON---3.22...Leave a comment:
-
Re: Lg tv 47ln5750 led driver is problem ..
Tonight will check all what you said then will report later Thank Budm
...
Leave a comment:
No activity results to display
Leave a comment: