Re: LG47LC7DF power supply issue- pics and some voltages
So if I unhook the connector P201 then take the on/off wire out of the connector, then plug it back in, the red light on the front will light up. If I measure the voltage on the wire I removed from the connector after hitting the on button it will read 2.3 volts, after several minutes it will go to 3.3 volts on its own. Then if I push the wire back into the connector, it will turn the tv on and it all works great. Shut the tv off with the power button and then it goes back to the beginning of the problem again?
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links56
Member
Last Activity: 03-22-2017, 09:33 AM
Joined: 01-03-2015
Location: New Boston
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Re: LG47LC7DF power supply issue- pics and some voltages
How would I go about forcing the power supply to start? Apply 5v to the on/off pin? Just want to make sure the power supply is working. Thanks.Leave a comment:
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Re: LG47LC7DF power supply issue- pics and some voltages
Here ya go
[URL=http://s805.photobucket.com/user/links_56/media/20150105_232255.jpg.html][/URL]Re: LG47LC7DF power supply issue- pics and some voltages
Here ya go
[URL=http://s805.photobucket.com/user/links_56/media/20150105_232255.jpg.html][/URL]Leave a comment:
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Re: LG47LC7DF power supply issue- pics and some voltages
Sorry about that, the auto correct kept changing what I was typing. Anyways I'm glad the picture helped clear that up. I appreciate you guys helping me.Leave a comment:
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Re: LG47LC7DF power supply issue- pics and some voltages
Here ya go.
[URL=http://s805.photobucket.com/user/links_56/media/Mobile%20Uploads/20150105_204936.jpg.html][/URL]
[URL=http://s805.photobucket.com/user/links_56/media/Mobile%20Uploads/20150105_205106.jpg.html][/URL]
[URL=http://s805.photobucket.com/user/links_56/media/Mobile%20Uploads/20150105_205048.jpg.html][/URL]
[URL=http://s805.photobucket.com/user/links_56/media/Mobile%20Uploads/20150105_205029.jpg.html][/URL]
[URL=http://s805.photobucket.com/user/links_56/media/Mobile%20Uploads/20...Leave a comment:
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Re: LG47LC7DF power supply issue- pics and some voltages
Looks like P202 is :
Pin1-19v?
pin2-19v?
pin3-gnd
pin4-gnd
Pin5-6.5v
pin6-gnd
pin7-3.4v
pin8-gnd
pin9-12v
pin10-gnd
Connector P201 has pin 2 listed as on/off.Leave a comment:
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Re: LG47LC7DF power supply issue- pics and some voltages
The main board is the other circuit board in the center of the tv? I'll take the heat shield off and see what it looks like.Leave a comment:
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Re: LG47LC7DF power supply issue- pics and some voltages
It's LCD I believe. Starting with the top connector P201
PIN1-ACD- 5.06v
Pin2-on/off-0.0v
Pin3-st5v-5.06v
pin4-GND-0.0v
Pin5-in ctrl-0.0v
Pin6-err-0.0v
pin7-burst dim-0.0
Pin8-st5v-5.06v
Pin9-GND-0.0v
pin10-adim-0.0v
Pin11-6.5v-0.0v
pin12-GND-0.0v
Pin13-3.4v-0.0v
Connector P202 has no voltage on any of the pins
Connector P203
Pin1-3.4v-.714v
pin2-3.4v-.714v
pin3-GND-0.0v...Leave a comment:
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Re: LG47LC7DF power supply issue- pics and some voltages
Where should I check for 5v? Is there a spot with the schematics I could get it from? Thanks.Leave a comment:
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LG47LC7DF power supply issue- pics and some voltages
Hey everyone, I'm trying to fix the power supply board on my lg47lc7df tv.
Problem:
No power
No power light
Things I've done:
replaced the 9 capacitors that usually go bad.
Things I've checked:
both fuses are good
I get a reading of 250 vac at fuse F 700
Both filter caps have 175vdc.
Connector P203 has twelve pins reads as follows
Pin1-.714v
pin2-.714v
pin3-none
pin4-none
pin5-.090v
pin6-.090v
pin7 Thru pin12 have no reading
I'm posting... -
Re: New Members - please post your introductions here
Hello, my name is Justin and I'm a jack of all trades, master of none. Haha. That being said I always have loved electronics and I am an electrician. Thanks.Leave a comment:
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