Re: Panasonic TX-L32U3B will not power up
Well I just done a reset same as the they did in the link and TV is now working fine!! Thanks for that much appreciated!
Bing
Member
Last Activity: 03-11-2018, 06:56 AM
Joined: 11-27-2017
Location: Norwich
-
Re: Panasonic TX-L32U3B will not power up
Ok that's interesting so does that mean that the fault is with the IC or does inv mean inverter circuit? Is so how would I go about troubleshooting this? Thanks for replyingLeave a comment:
-
Re: Panasonic TX-L32U3B will not power up
Here are the images you asked for thanks for replying...Leave a comment:
-
Re: Panasonic TX-L32U3B will not power up
I got the voltages from the main board being plugged into PSU but after I got readings I then disconnected mainboard after just to see if backlight came on.Leave a comment:
-
Re: Panasonic TX-L32U3B will not power up
Better image of main board...Leave a comment:
-
Re: Panasonic TX-L32U3B will not power up
Here are images of main and power pcbs...Leave a comment:
-
Panasonic TX-L32U3B will not power up
I have a 32" panasonic TX-L32U3B LCD tv that i have that i am a bit stuck on,
when tv is plugged in and turned on all you get is green led on front on, when i first tried it did briefley come only for few seconds, the psu looks ok there is no legend for the rails but voltages are as follows
0 v
0 v
0 v
0 v
3.1 v
0 v
0 v
5.8 v
2.8 v
0 v
16.1 v
16.1 v
16.1 v
0 v
5.8 v
when i tried to power up tv with the psu output removed i did not even get green light on.
... -
Re: samsung lE22B450C8W no standby
Thanks for the info, just out of curiosity and if replacing the diodes does not fully resolve issue, if the transformer t101 is powering the 5 volt supply, what is powering the 14 volts supply? please excuse my lack of knowledge as only a novice! Thanks for readingLeave a comment:
-
Re: samsung lE22B450C8W no standby
Please note D105 and D106 I have removed to check D105 being diode which is showing short.Leave a comment:
-
Re: samsung lE22B450C8W no standby
Here are pictures of power supply board....Leave a comment:
-
samsung lE22B450C8W no standby
hi, i have a Samsung 22" lcd tv which has no standby voltage, i done a bit of investigation and found a shorted diode on the standby circuit, my question is should i just replace the faulty diode or is there other components i should also check? with limited knowledge would i be right in saying these diodes would be running at high frequency which could make them very hot as to fail?i think they are rectifying the output from the standby circuit transformer?
Also to source a replacement do i only need the top number printed on it being SB560? i will post some pictures below thanks... -
Re: Samsung LE37B550A5WQXU intermittent fault
Just an update, as advised by in previous post I cleaned the main board with alcohol, nipped the pin together on the the aireal in port, and put TV back together had it on for about 4 days and had no problems at all on any inputs which is a good job as my son will be needing it to play his new X box on on Xmas day! I will probably be keeping this TV so if it fails again I will re post but thanks for the advice and replies merry Christmas!Leave a comment:
-
Re: Samsung LE37B550A5WQXU intermittent fault
I was thinking it could be a overheating issue, I have read some older threads that say it could be down to ir on off touch pannel on the front but not sure how I would be able to test that
Last edited by Bing; 12-13-2017, 04:19 PM.Leave a comment:
-
Re: Samsung LE37B550A5WQXU intermittent fault
Yer I see that too, I can sort that but TV did still power off when using scart and hdmi the only time it never failed with signal or turning off was when I used TV to listen to radio, I'll try having a look at cap under metal cover is it easy to remove? Do u mean u heated metal cover to make it fault?Leave a comment:
-
Re: Samsung LE37B550A5WQXU intermittent fault
Hopefully these pictures are ok, I took some extra pics of the main board as I noticed some kind of residue on it underneath. I think the power supply board maybe ok all output voltages seem ok the only one that is low is the second from the end I think pin 14 labeled (det) was 2.9 volts when is marked 5 volts. When I ran TV again I could not get it to fail (sods law) I even tryed to apply some heat to main board but would not fail! Let me know if you need anymore info cheers
...
Leave a comment:
-
Samsung LE37B550A5WQXU intermittent fault
I seem to have a very strange fault with this tv, most of the time it works fine but will occasionally turn off and on again it will sometimes make a nasty crackling noise through the speakers when it does this normally i leave it off for a while and will be ok when i turn it back on. The other thing about this fault is this never happens when using the tv to listen to the radio through the radio channels. also when watching tv sometimes the signal drops even tho we have good signal strength. not sure if there is a issue with some components overheating. thank for reading
-
Re: New Members - please post your introductions here
Hello, to all my name's stu, I am a service engineer dealing with mobility equipment in the UK, I am a bit of a novice when I come to electronics but am very keen to know more, I joined this forum for assistance and advice on repairs and projects I do in my spare time 😊 thanks for reading my post!Leave a comment:
No activity results to display
Leave a comment: