Re: Sharp Aquos LC52SE94U hit by surge
Bridge is open...
Bridge is open...
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Re: Sharp Aquos LC52SE94U hit by surge
Bridge is open now with J7027 back in placeComment
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Re: Sharp Aquos LC52SE94U hit by surge
OK, then take the resistance reading between Source and Drain pin of MOSFET Q7808, it should show very low resistance.Attached FilesLast edited by budm; 02-27-2014, 12:44 AM.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Sharp Aquos LC52SE94U hit by surge
.3 ohmComment
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Re: Sharp Aquos LC52SE94U hit by surge
OK, now remove it and test again. If it is still short, you will have to replace it and also the PFC IC (IC7800) that drives this MOSFET at the same time.
It is late here so I am going bed, at least we are getting some where.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Sharp Aquos LC52SE94U hit by surge
It's later here-thank u very much! Great troubleshoot practices and knowledge to go with. Great progress...
I'm optimistic (-:Comment
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Re: Sharp Aquos LC52SE94U hit by surge
Here is the simplified diagram and the how that shorted out MOSFET is connected.Attached FilesLast edited by budm; 02-27-2014, 09:45 AM.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Sharp Aquos LC52SE94U hit by surge
Very nice sketch Budm, I will definitely file that.
So I got the 6R199P MOSFET out and the source and drain are indeed shorted.
Made some notes as well and look around at possible sources. Haven't looked into the ic yet will start to recearch it and hopefully do some one stop shopping(still need fuses too).Attached FilesComment
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Re: Sharp Aquos LC52SE94U hit by surge
Is that all that's printed on the device?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Sharp Aquos LC52SE94U hit by surge
Make sure to put that Ferrite bead back on the leg of the new MOSFET. That part is not in the service manual?Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Sharp Aquos LC52SE94U hit by surge
Meant to ask you about that since I noticed them, what is the purpose of these, some sort of mag flux or inductance insulator or just straight up insulation?
Going to down load that manual, I assume you mean the one Tom66 suggested; will put it on my laptop, been doing this with the iPad and can't figure how to DL properly.Last edited by Fwrothy; 02-27-2014, 02:10 PM.Comment
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Re: Sharp Aquos LC52SE94U hit by surge
It reduces the high frequency noise that can radiate off that pin. Such noise can cause problems with getting EMC compliance.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Please upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740Comment
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Re: Sharp Aquos LC52SE94U hit by surge
Selldoor always has a knack of finding these. Looks like the right part.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Sharp Aquos LC52SE94U hit by surge
Digikey
http://www.digikey.co.uk/product-det...9CP-ND/2080865
Also on ebay from ChinaPlease upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740Comment
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Re: Sharp Aquos LC52SE94U hit by surge
I noticed a difference in case types some have metal heat sinking tabs, this one is all ceramic. Designation TO262? What is the script on the right side batch?Comment
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Re: Sharp Aquos LC52SE94U hit by surge
Not sure what you are saying? They also make this one in a TO262
https://cdn.badcaps-static.com/pdfs/...85b4988db2.pdf
But again it is all ceramic.
SORRY - that is an N channel
LATE EDIT
Damn they are both N channelLast edited by selldoor; 02-27-2014, 02:51 PM.Please upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740Comment
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I found another post on this site the other day which has been very helpful in troubleshooting this issue I am having with my tv. The left half of the screen is dark, and the other half is VERY slow to generate it's image - and it only generates part of its image at that.
Based on this yt video, I have narrowed it down to an issue (short?) on the left side of the display, somewhere in the system of ribbon cables.
when I remove the bezel and the rear cover, I can get the image to display correctly by manipulating the ribbon cables on the left side which connects the left lower display... -
Hello!
I'm a few days old into this TV screens repair universe so please bear with me.
Recently, and all of a sudden my 40” 4K Sharp Aquos LCD TV turned on with colors all smudged in some places on the screen that remain like that even without any kind of video source. I do have image but the colors are smudged/tinted/ washed out in patches as per defects. This to me looks similar to burn in but I’m shore this is not an OLED.
- I did the classic unplug and hold power button to discharge the caps but it didn't help.
- I did a factory reset as well... -
Hello, I disassembled this dead camera, and found this WTF… Two fuses soldered one above the other !
I was pretty sure nobody touched it before, but that can't be from factory. There is flux, and capacitor is probably missing.
The other weird thing : the fuses are « G » fuse : (0.75A – 8V), seems very low. The original fuse should be « O » : (32V 2,5A).
There is « O » mark beside. All fuses have the same mark letter on main board. So, I can deduce it's a « O » fuse.
And this correspond to the issus I saw : when I plug the battery, I measure the voltage dropping... -
Hi community,
I will describe my problem with a TV in those short following terms to be the most precise :
What i have :
Sharp Aquos LC-60LE635E
power board DPS-162KP-1
main logic board QPWBXF733WJN2
symptoms :
white led light logo at startup,
after 2 minutes, blinking 3 times a row, repeating
no backlight (and apparently no picture, checked panel with flashlight)
no startup sound
powerboard investigations :
1-2 PNL : 0v
3-4 GND
5-6-7-8 UR : 13.15v
9-10-11-12... -
Can anyone help me diagnose this? Almost not worth bothering with, but it has 'sentimental value' for the owner. I'm no TV technician, but dabble a bit.
The TV has standby power but no reaction at all to switching on or reboot steps, No flashing lights or response to menu button. All voltages on the power board are correct apart from missing voltage on pin 12 of CN7003.
There is 13 v on U7053 but no 3v signal to switch it on. I don't really understand whether the 3v should come from U7401 in the standby control area, or (as suggested elsewhere) from the mainboard via pin 12....
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