And without you I can't found it, and learn a lot meanwhile!!
Thanks sooooooo muuuuuch much budm
elchatarreroelectronico
Member
Last Activity: 12-20-2020, 05:02 AM
Joined: 11-17-2014
Location: Galicia
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Re: sharp lc-42ad5e-bk No power No standby led
And without you I can't found it, and learn a lot meanwhile!!
Thanks sooooooo muuuuuch much budm
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Re: sharp lc-42ad5e-bk No power No standby led
No power. No standby ledLeave a comment:
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Re: sharp lc-42ad5e-bk No power No standby led
So new main board, I've checked to buy it but I only can find it in USA, no sharp replacemnts all around, maybe they do not sell spare parts? i'll will try to contact them.Leave a comment:
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Re: sharp lc-42ad5e-bk No power No standby led
They were always onLeave a comment:
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Re: sharp lc-42ad5e-bk No power No standby led
yesLeave a comment:
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Re: sharp lc-42ad5e-bk No power No standby led
Please hit me!! I know right now that my problem is about the false readings,. I disconnect all and start for the begining, put the psu in the workbench (This time upside down "Of course" newbie stupidity!!! i was making the readings from the components side ) and take all the measurements (more than twice this time) in the same condition Pcon1,pcon2 to 5V no INV_ON connected, and this time y move the black probe straight to GND plane in the pcb
Here the readings:
PC con:
...Leave a comment:
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Re: sharp lc-42ad5e-bk No power No standby led
Right now testing INV24V
I`m just realized of this: (I've tested with two multimeters)
Multimeter Black and Red probe connected:
INV24V: 19,60 [U][B]VAC[/B][/U] 0V[U][B]DC[/B][/U]
If I disconnect the Black probe "GND" the volages are the same!! False reading, I asume that the multimeters are picking noise from the ccfl.
So........I dont know what to do...Re: sharp lc-42ad5e-bk No power No standby led
Right now testing INV24V
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Re: sharp lc-42ad5e-bk No power No standby led
Thanks soo much.
I have so much to learn.........
I'm going right now and check PCON1 and PCON2, so I have to disconnect the resistors and plug in all connector and check if is there any spikeup. Isn't It?
About the INV24V I'm not sure 100% I'll will check it too.
About the Power-det circuit, I think I forgot a lot of the electronics that I have learnt some year ago , thanks so much for the effort, I'll study it. So Have I to monitor de POWER_DET circuit...Leave a comment:
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Re: sharp lc-42ad5e-bk No power No standby led
Sorry Cap numer 7800
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Re: sharp lc-42ad5e-bk No power No standby led
First of all, Thanks so much for your help!!!!
Here is the story, I hope someone helps it.
Yesterday I test to disconnect the T-CON board then, I plug the mains cable and I tried to power it , I realize the standby led blinks red once C7001=0V.
Try again while C7001 was discharging and no blink.
I waited until C7001=0V an tried again, power and no blink, I tested the voltages and no change, so I moved on and tried to force the psu like you said.
I disconnected...Leave a comment:
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Re: sharp lc-42ad5e-bk No power No standby led
OOpsssss I forgot, all the tests with or without the mainboard?Leave a comment:
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Re: sharp lc-42ad5e-bk No power No standby led
Thanks so much for the quick response !!!!
I'll try that too, and tell you what happens!! So a good test afternoon in the lab today!!
Yeah!!!
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Re: sharp lc-42ad5e-bk No power No standby led
And here are some of the schematics that I'm using
Today I'm gonna try to disconnect the TCON and take some hi res photos.
Thanks...Leave a comment:
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Re: sharp lc-42ad5e-bk No power No standby led
Thank's for the quick response [B]budm[/B]
I had already read those documents that you had posted.
Today I'll try to disconnect the TCON board and see what happens.
In case that It doesn't work. How can I force the psu? Should I short Pcon1,Pcon2,Inv_on, to 3.3V or 5v?
Well here are the photos and some schematics I'm using. If you need more detail photos tell me please.
Thanks a lot.Re: sharp lc-42ad5e-bk No power No standby led
Thank's for the...Leave a comment:
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Re: sharp lc-42ad5e-bk No power No standby led
I forgot all caps seems to be okLeave a comment:
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sharp lc-42ad5e-bk No power No standby led
Hello to everyone, and first of all sorry for my English, I'm new here and mostly all the TV's that I had repaired was due to bad capacitors, but this one It's different
Well, I think I almost read all the post related to the Sharp Aquos, but there are slight differences to my TV and I'm a bit confused, diferent type of power supply, different pins names, ….etc.....
I'm using this manual LC-42AD5E/RU/S from elektrotanya, here the link: [url]http://elektrotanya.com/sharp_lc-42ad5e_ru_s.zip/download.html[/url] , It seems exactly the same for my tv except for the... -
Re: New Members - please post your introductions here
Hi, and first of all sorry for my English.
Well after search a lot in internet, finally I found what I think it's one of the best resources to learn how to troubleshoot any problem on any TV. Thanks a lot to all the people who helped to make grow this forum!!!!Leave a comment:
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