Re: Proscan 50" PLDED5066A-E no backlights
Decided to go ahead and complete the LED swaps. All of the bad ones were shorted. TV works perfect. Thanks everyone....
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Re: Proscan 50" PLDED5066A-E no backlights
Here is an update. I bought a rework air station. I was able to remove some LED s from and old strip and replace the bad ones. First on a success. I will try and get them all done this weekend and install back in TV to see if it works. Thanks again everyone for helping....
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Re: Proscan 50" PLDED5066A-E no backlights
Thank you I will try that this weekend
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Re: Proscan 50" PLDED5066A-E no backlights
Thank you again for your time and patience. Is there a easy way to remove led from the strip?
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Re: Proscan 50" PLDED5066A-E no backlights
First I would like to thank everyone for the help. Update!! Apparently when I tested each LED in the strip I missed the first LED in each strip. I bought a power supply and tried to test each pair of wires with 45 DCV. I got nothing so I broke down and removed all of the strips from the tv. On all five strips the first LED is bad. The back of the strip under those LEDs are burnt. Sorry for the confusion.
Is there a way to remove the LED and replace those that are bad. The strip is around 25 each and the tv is not worth...
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Re: Proscan 50" PLDED5066A-E no backlights
5 X 14. I connected two AA batteries and checked each light individually. They all worked.
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Re: Proscan 50" PLDED5066A-E no backlights
C9F=.661
C8F=.669
I only have a DMM but I took pic of the screen with a high speed camera on my phone while turning on. The voltage when turned on jumps to 1.8 volts them drops to .66 volts.
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Re: Proscan 50" PLDED5066A-E no backlights
All of the wires of the female connector to chassis ground were OL
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Re: Proscan 50" PLDED5066A-E no backlights
If there is a lock our curcuit, which pin on the IC would it connect too and I will try and trace it.
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Re: Proscan 50" PLDED5066A-E no backlights
I traced pin 17 and pin 18 to T1F. Is there any faults that will stop the voltage from reaching pin 18 and 17 other than the IC itself?
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Re: Proscan 50" PLDED5066A-E no backlights
Should the other pin 5 thru 18 read in mV ?
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Re: Proscan 50" PLDED5066A-E no backlights
No scope so I will try and locate a IC
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Re: Proscan 50" PLDED5066A-E no backlights
Q7F is left of pic
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Re: Proscan 50" PLDED5066A-E no backlights
Q7F is top of pic...
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Re: Proscan 50" PLDED5066A-E no backlights
IC1F
1 VCC 11.10V
2 STB 4.13V
3 GND
4 RT 1.487 V
PINS 5 thru 18 reads mV
Question. Q7F runs off pin 1. The 3 pins of Q7F read 11v
11.10v, 11.79v, and 11.80v. Is this normal?
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Re: Proscan 50" PLDED5066A-E no backlights
Where should I start trying to trace it out. Thank you for helping
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Re: Proscan 50" PLDED5066A-E no backlights
C10f=mmkp82 223j63d.
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Re: Proscan 50" PLDED5066A-E no backlights
Out of curcuit read 22.31 nf
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