Re: RCA led65g55r120q power supply problem
Turns out the problem was a regulator and a blown L.E.D . Voltage flash on led output was 82v and 34v (regulator). After replacing regulators voltage read 283v and 147v. The 283v told me no load was connected ,therefore burnt L.E.D.
Electechj
Member
Last Activity: 07-31-2017, 01:51 PM
Joined: 04-22-2017
Location: Redford , Michigan
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Re: RCA led65g55r120q power supply problem
Did a 5v load test with BK connected and disconnected, on and off condition. At first the florescent light stayed on then when power on into shut down light went off then back on then back off then back on .......
It then went on and off in stby . Looks like a bad stby supply....Leave a comment:
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Re: RCA led65g55r120q power supply problem
I will do a load test tonight had to work late today.
The pfc # is ap4310amLeave a comment:
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Re: RCA led65g55r120q power supply problem
Thanks for your help . I did some test and found these voltages on the backlight/ADJ circuit . I found 1.5v on the backlight optocoupler PFC/cold side and .7v on the ADJ optocoupler . Hot side backlight optocoupler was 16.8v and ADJ hot side was .3v . Checked and changed the electrolytic on the ADJ optocoupler with no change.Leave a comment:
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Re: RCA led65g55r120q power supply problem
Need to add there is no 24v hookup so no 24v supply line. Couldn't edit post , is the reason for this messageLeave a comment:
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Re: Samsung CCFL to LED conversion
worse on bright areas...Leave a comment:
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Re: RCA led65g55r120q power supply problem
Yes , this happens on shut down/protect mode. Then it goes back to 5.1v. Delay/dead time it's at 4.9v. Backlights flash on shut down.Last edited by Electechj; 04-22-2017, 11:28 PM.Leave a comment:
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Re: RCA led65g55r120q power supply problem
Power board - backlight 5v signal connected
Pin # 1. 24v , standby = 0v , power on = 24v then drops to 0v
Pin #2. 24v, standby = 0v,power on = 24v then drops to 0v
Pin #3 & #4 = gnd
Pin #5,#6 & #8 = 12v ,standby = 0v, power on = 12v then drops to 0v
Pin #7,#9,#10 & #11 = gnd
Pin #12,#13 & #14 = 5v, standby = 0v, power on = 5v then drops to 0v
Pin #15 = PS , standby = 0v, power on = 2.8v then drops to 0v
Pin #16 = 5vs ,standby = 5.1v ,power on = 4.9v then drops to...Last edited by Electechj; 04-22-2017, 09:48 PM.Leave a comment:
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[QUOTE=dskall;741874]Need good clear straight on pictures of back of tv with cover off and each board.[QUOTE=dskall;741874]Need good clear straight on pictures of back of tv with cover off and each board.Last edited by Electechj; 04-22-2017, 09:23 PM.Leave a comment:
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RCA led65g55r120q power supply problem
When backlight 5v signal is applied,tv shuts down and goes into protect mode. When 5v backlight signal is removed, tv stays on with image and sound. -
Re: Samsung CCFL to LED conversion
On a dynex 40 i took out the inverter and ccfl's and put leds from a 32 westinghouse on the 24v out (3 strips 6 leds each in parallel with two 150 ohm quarter watt resistors in series). Resistors get a little warm but are good and it has been running for a couple of weeks. It's temporary till a led strip with dim control comes in the mail . When converting ccfl to led the screen will show the led bright spots unless the lights beams are spread by a filter. Otherwise all is goodLast edited by Electechj; 04-22-2017, 07:25 PM.Leave a comment:
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Re: New Members - please post your introductions here
Hello From Michigan. I have been fixing electronics for a long time but since there is a lot of different electronics , there is always something new to learn. So I come to learn and share knowledge.Leave a comment:
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