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Search: Posts Made By: triplefour
Forum: Troubleshooting TVs and Video Sources 05-28-2019, 01:52 AM
Replies: 86
Views: 1,059
Posted By triplefour
Re: SHARP LC-80LE633U has open resistor r7133 on PSU

so i finally got some time to look at this again. in the meantime i built this tool to help with connecting 5vsb to PSON and 5vsb to PNL_POW (and other configs for other tvs). its just a psu to mb...
Forum: Troubleshooting TVs and Video Sources 05-25-2019, 11:18 PM
Replies: 86
Views: 1,059
Posted By triplefour
Re: SHARP LC-80LE633U has open resistor r7133 on PSU

sadly i havent had enough time to look at this board lately. hopefully things will settle down soon. not giving up.
Forum: Troubleshooting TVs and Video Sources 05-24-2019, 04:32 PM
Replies: 86
Views: 1,059
Posted By triplefour
Re: SHARP LC-80LE633U has open resistor r7133 on PSU

did some more digging and found this one that is labeled SSC9510 but it does contain info on SSC9512S, and has a lot more info in it. i think i can trust this datasheet to tell me the correct...
Forum: Troubleshooting TVs and Video Sources 05-24-2019, 03:15 PM
Replies: 86
Views: 1,059
Posted By triplefour
Re: SHARP LC-80LE633U has open resistor r7133 on PSU

so the datasheet i posted for IC7203 doesnt really help me. because in the datasheet where it shows what pins are what, it is talking about the 16pin package. (SSC9512) then it says SSC9512S(SOP-18)...
Forum: Troubleshooting TVs and Video Sources 05-18-2019, 05:42 PM
Replies: 86
Views: 1,059
Posted By triplefour
Re: SHARP LC-80LE633U has open resistor r7133 on PSU

sorry for the delay. as usual life gets in the way! but here are the IC's

IC7203
SSC9512S
SK102
862T
Forum: Troubleshooting TVs and Video Sources 05-18-2019, 02:44 AM
Replies: 86
Views: 1,059
Posted By triplefour
Re: SHARP LC-80LE633U has open resistor r7133 on PSU

trying to follow what davi.p said, i see that the datasheet for the optocoupler does agree that 1.2 is a typical forward voltage for the LED. so really, reading 1.1v there means at least the LED...
Forum: Troubleshooting TVs and Video Sources 05-17-2019, 11:43 PM
Replies: 86
Views: 1,059
Posted By triplefour
Re: SHARP LC-80LE633U has open resistor r7133 on PSU

davi.p i tested the psu with both the PSON pin to 5v and the PNL_POW to 5v as well, before i hooked it up to everything and had the backlight come on and and almost functioning tv except yes no...
Forum: Troubleshooting TVs and Video Sources 05-17-2019, 12:47 AM
Replies: 86
Views: 1,059
Posted By triplefour
Re: SHARP LC-80LE633U has open resistor r7133 on PSU

thank you budm. yes i really want to understand it this time. i am tired of replacing boards. but for the customer this is usually the quicker option. i want to replace components! fix all the tvs!...
Forum: Troubleshooting TVs and Video Sources 05-16-2019, 11:57 PM
Replies: 86
Views: 1,059
Posted By triplefour
Re: SHARP LC-80LE633U has open resistor r7133 on PSU

PS_ON is not ok. i am only getting it by using a 1k resistor between 5vsb and PSON pin, and it is not boosting the PFC voltage so of course its also not producing the UR13v. think i need to short the...
Forum: Troubleshooting TVs and Video Sources 05-16-2019, 10:23 PM
Replies: 86
Views: 1,059
Posted By triplefour
Re: SHARP LC-80LE633U has open resistor r7133 on PSU

i dont have ur13v for sure. thats what im trying to get. i had it for a while after changing the ic and resistor but after trying to get to service menu and using laptop as a hdmi source, the tv shut...
Forum: Troubleshooting TVs and Video Sources 05-16-2019, 09:17 PM
Replies: 86
Views: 1,059
Posted By triplefour
Re: SHARP LC-80LE633U has open resistor r7133 on PSU

ok but from experience you know that these optocouplers can and do go out? and sometimes heating them will make them work again for a bit?
totally worth checking if thats the case. hopefully all i...
Forum: Troubleshooting TVs and Video Sources 05-16-2019, 08:38 PM
Replies: 86
Views: 1,059
Posted By triplefour
Re: SHARP LC-80LE633U has open resistor r7133 on PSU

RJ i know about using 1k resistors to trick a power supply on. i believe i mentioned i was doing that in this thread. thank you though, in case i didnt know that. its critical knowledge for sure, and...
Forum: Troubleshooting TVs and Video Sources 05-16-2019, 03:02 PM
Replies: 86
Views: 1,059
Posted By triplefour
Re: SHARP LC-80LE633U has open resistor r7133 on PSU

is this some ohms law math stuff? where if the current increases over a resistor, the voltage drop increases as well? i may need some schooling here.

but if so, what could be drawing so much...
Forum: Troubleshooting TVs and Video Sources 05-16-2019, 01:09 PM
Replies: 86
Views: 1,059
Posted By triplefour
Re: SHARP LC-80LE633U has open resistor r7133 on PSU

DAVI.P thank you for your input but i have moved on from checking that area because i have steady 5vsb all the time now. after i resoldered the IC a second time, i have had no problems there.
...
Forum: Troubleshooting TVs and Video Sources 05-15-2019, 10:57 PM
Replies: 86
Views: 1,059
Posted By triplefour
Re: SHARP LC-80LE633U has open resistor r7133 on PSU

ok i just checked again and those voltages in the picture are correct. i get 5v on that jumper J7573 , and it only goes thru that 1k resistor R7538 (which checks out fine at 1k btw) and then it ends...
Forum: Troubleshooting TVs and Video Sources 05-15-2019, 09:12 PM
Replies: 86
Views: 1,059
Posted By triplefour
Re: SHARP LC-80LE633U has open resistor r7133 on PSU

i thought i was tracing the voltage going from pin 14 to pin 3 of the octocoupler all the way to the left. but i was wrong about that. thanks for your help in seeing that. so disregard that.

so...
Forum: Troubleshooting TVs and Video Sources 05-15-2019, 08:27 PM
Replies: 86
Views: 1,059
Posted By triplefour
Re: SHARP LC-80LE633U has open resistor r7133 on PSU

ok thank you for your edit. i see now that it would go to ground there. and learned again another thing to look for to help understand where things are going. i still dont understand why i see that...
Forum: Troubleshooting TVs and Video Sources 05-15-2019, 08:11 PM
Replies: 86
Views: 1,059
Posted By triplefour
Re: SHARP LC-80LE633U has open resistor r7133 on PSU

im not seeing what you're talking about. can you give more details? i trace pin 14 PSON to the SMD resistor labeled 1002 which measures 10k as it should. from there it goes thru C7520 then thru J7572...
Forum: Troubleshooting TVs and Video Sources 05-15-2019, 07:59 PM
Replies: 86
Views: 1,059
Posted By triplefour
Re: SHARP LC-80LE633U has open resistor r7133 on PSU

i triple checked my tracings. did you see the image i posted with the trace in red? also i can trace the voltage along the capacitors and jumper wires all the way to where it is present on the pin of...
Forum: Troubleshooting TVs and Video Sources 05-15-2019, 07:27 PM
Replies: 86
Views: 1,059
Posted By triplefour
Re: SHARP LC-80LE633U has open resistor r7133 on PSU

great we're on page 3 now.
thank you RJ. that makes sense why i would be getting 0v there then. and makes my mind just a little more clear...possibly can understand what the datasheet is saying now...
Forum: Troubleshooting TVs and Video Sources 05-15-2019, 07:01 PM
Replies: 86
Views: 1,059
Posted By triplefour
Re: SHARP LC-80LE633U has open resistor r7133 on PSU

the TVS or Snubber diode labeled T3D1D at location D7112. davi.p insists i must replace it. budm said i can test it with a LED tester.

so if i have 5vsb, then this IC7102 and the area around it...
Forum: Troubleshooting TVs and Video Sources 05-15-2019, 05:47 PM
Replies: 86
Views: 1,059
Posted By triplefour
Re: SHARP LC-80LE633U has open resistor r7133 on PSU

i took the snubber diode out and tested it with my LED tester as budm said to do. i assume black lead on the side with the stripe. it went up to about 250 pretty quick, and then slowly to 251, even...
Forum: Troubleshooting TVs and Video Sources 05-15-2019, 04:22 PM
Replies: 86
Views: 1,059
Posted By triplefour
Re: SHARP LC-80LE633U has open resistor r7133 on PSU

thanks for the explanation. sorry for not googling first! i looked for a fuse at ICP7201 but its just a jumper wire! what is happening to the 5v pson signal, and where does it need to go to turn on...
Forum: Troubleshooting TVs and Video Sources 05-15-2019, 03:43 PM
Replies: 86
Views: 1,059
Posted By triplefour
Re: SHARP LC-80LE633U has open resistor r7133 on PSU

idk what happened. i had it so close, but now something is wrong on the PSU again and i cant get the 13v to come back on even tho i put 5v to PS_ON.

after trying the resets (both styles) i had it...
Forum: Troubleshooting TVs and Video Sources 05-15-2019, 03:04 AM
Replies: 86
Views: 1,059
Posted By triplefour
Re: SHARP LC-80LE633U has open resistor r7133 on PSU

ok i found the factory reset thread and tried what tom66 said here
https://www.badcaps.net/forum/showpost.php?p=309699&postcount=11


holding input + volume down as i plug in the TV got it to...
Showing results 1 to 25 of 500

 
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