Is there a way to do an hardware reset directly on the pcb?
any suggestion?
sushy74
Member
Last Activity: 07-18-2023, 03:44 AM
Joined: 06-04-2020
Location: Puglia
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Re: Strange issue with United LTV 19X83WDVBT LCD TV
Is there a way to do an hardware reset directly on the pcb?
any suggestion?
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Re: Strange issue with United LTV 19X83WDVBT LCD TV
This doesn't work...menu function seems not responding either from remote or tv button...Leave a comment:
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Re: Strange issue with United LTV 19X83WDVBT LCD TV
Anyone can suggest what to try? I'm really going crazy with this tv...😟Leave a comment:
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Strange issue with United LTV 19X83WDVBT LCD TV
Good evening, I have a problem with this lcd tv (UNITED branded with BEKO electronics), I would need to fix it to try some old video game consoles as it has digital / analog tuner.
I found it after years and once I turned it on I realized that it took a while to go from standby to operational, but above all I notice that it is blocked in some way, let me explain ... no physical button on the TV works, using the remote control (which is a compatible one) only some keys work, such as the one for power, volume, numbers and little else, I cannot change source and above all it does not access... -
Re: Samsung 2493HM and damn BN44-00195A PSU
Fortunally i met this fantastic forum...repaired TN801 mounted on the board and my Samsung monitor is back to life!
Thanks a lot R_J for your valuable help....i hope this thread could help someone else with same problem.
regards
Francesco from ItalyLast edited by sushy74; 06-08-2020, 12:25 PM.Leave a comment:
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Re: Samsung 2493HM and damn BN44-00195A PSU
Ok, sorry for my stupid mistake...i notice just now that two 22ohm resistors are in parallel with dm803 and dm806, that's why i have 22omh on both sides of diodes..i imagine the only way to test those diodes is desoldering them or at least desolder resistors in parallel. I'm a little afraid about desoldering smd components, i think i will waith some more help or trying to power on psu hoping nothing will explodeLast edited by sushy74; 06-08-2020, 03:59 AM.Leave a comment:
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Re: Samsung 2493HM and damn BN44-00195A PSU
I haven't resoldered TM801 yet, so not yet tested PSU ...would like first to be sure about DM803 and DM806 test and if i have to test some more components without TM801 on pcb
TnxLast edited by sushy74; 06-07-2020, 12:48 PM.Leave a comment:
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Re: Samsung 2493HM and damn BN44-00195A PSU
Thanks a lot dear friend....
I unsoldered and tested TM801 and found a disconnected pin...it was for me very difficult to repair but i was able to sold pin to wire coming out from yellow tape, now there is continuity and testing pins with DMM at 200ohm scale i can read 0.06 in primary and both secondary. As you advised i made a test of gate circuit....all resistors are ok, about DZM802/3/4/5 with DMM set to diode test i can read a value of 0.712/15 for all, reversing DMM leads circuit is open. Now, talking about DM803 and DM806...Last edited by sushy74; 06-07-2020, 08:22 AM.Leave a comment:
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Re: Samsung 2493HM and damn BN44-00195A PSU
Tnx a lot for reply. sorry for stupid question, but witch part exactly you mean talking about "gate circuit"?Leave a comment:
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Re: Samsung 2493HM and damn BN44-00195A PSU
I would like to test TM801 transformer with my DMM, but i don't know how
if someone could explain would be great
tnx a lot in advanceLeave a comment:
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Samsung 2493HM and damn BN44-00195A PSU
Hi everyone, sorry if I open a new thread on this power supply board, but after reading the present ones I was unable to solve the problem. A few days ago I turned on the monitor and hear a small bang, the monitor does not turn on and the blue LED flashes.
I disassemble the monitor and try to understand what the problem is with the power supply board, I immediately notice the RM801 (0.22ohm) resistor burnt. I replace it and try to turn it back on, of course it burns again, I put a new one and check with my digital multimeter the 2 fet QM802 and QM803 that are burnt, I replace them and, for...Last edited by sushy74; 06-06-2020, 08:02 AM. -
Re: New Members - please post your introductions here
Hi everybody, i'm Francesco from south Italy. I'm going crazy trying to repair a BN44-00195A power supply from my samsung monitor. really hope to find a solution in this very interesting board....hope to learn something more too
P.s.: I'm an electronic lover since 30 years.
tnxLeave a comment:
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