dagav
Member
Last Activity: 09-23-2024, 08:44 AM
Joined: 02-22-2015
Location: Jølster
-
For others encontering this fault, the solution for this TV-set was reprograming the eeprom on the mainboard.... -
+5V stby okLeave a comment:
-
Have gone trough the thread, and tried to find some tip, for the JVC - LT-50E73, without luck. Despite the rather old thread on TV5001-zc02, I hope some can give some clue about a JVC - LT-50E73 TV stuck in stby,(no reaction either on remote or buttons on TV), and with no backlight, with this powerboard inside. Voltage missing on the main connector is on/bk. On Led connectors voltages are 0, on all outputs, and no difference if they are connected or not. My ledstrip tester says 300V, open circuit, on both strips, so they are faulty. But can it also be a faulty motherboard since the TV is stuck...Leave a comment:
-
Re: Removing large LCD panels
Do you have a link to the video?...Leave a comment:
-
Re: Removing large LCD panels
Despite long inactivity in the thread, and not a answer to any of the previous posts, Im posting a similar problem that I recently experienced.
After replacing all backlights on a Samsung 55" UE55JU6875, I got blue marks and som blue dots in dark pictures, see attached picture. This is only visibel in dark pictures. Used suctioncups to lift of the screen, so the bowmarks is caused by this, but not the dots. Anyone have explanation on what causing this?...Last edited by dagav; 09-12-2022, 06:36 AM.Leave a comment:
-
Re: SMD marking 2290?
Hi, got help on EEVblog forum with this one. Despite missing markingnumber in the datasheet i think it is a MAAM-009100, RF amplifier, [url]https://cdn.badcaps-static.com/pdfs/c4fcb9b69085af87f66b71050b273604.pdf[/url]
It is 6 of them in a adjustable RF amplifier, originaly made by MACAB, a swedish company, but sold by a norwegian company as ELKO. It is very special solution(imo), used to amplify RF signal onto ethernetnetwork, using one of the pair, and a "balun" at each outlet, for connection to the TV. Since the PSU to this unit was dead,...Leave a comment:
-
SMD marking 2290?
What coponent does SMD marking 2290 indicate. Casing is SOT89-3... -
Re: Service manuals available free
Do you have mainboard BN94-06194L, for the PS43F4505AWXXE set, in stock?
(Also used in PS43F4900AK, if Im right).
Regards
Dag ArneLeave a comment:
-
Re: Samsung PS43F4505AWXXE no picture/sound
Tested the psu, without any other boards connected, PS_ON shorted to 0, and VS_ON connected to 5.3V by an 68K resistor, and all voltages could be measured, so the
psu works. Vs a little bit high, 213V instead of 208V as marked on chassislabel, but that maybe caused by no load. Pretty sure this is mainboardfailure. Anyone who knows where to get the mainboard partnr.BN94-06194L ?
RegardsLeave a comment:
-
Re: Samsung PS43F4505AWXXE no picture/sound
More and hopefully better pictures of the boards
[ATTACH]106455[/ATTACH]
[ATTACH]106456[/ATTACH]
[ATTACH]106457[/ATTACH]Re: Samsung PS43F4505AWXXE no picture/sound
More and hopefully better pictures of the boards
[ATTACH]106455[/ATTACH]
[ATTACH]106456[/ATTACH]
[ATTACH]106457[/ATTACH]Re: Samsung PS43F4505AWXXE no picture/sound
More and hopefully better pictures of the boards
[ATTACH]106455[/ATTACH]
...Leave a comment:
-
Re: Samsung PS43F4505AWXXE no picture/sound
Couldnt find any control board, nor any test pattern connector?
[ATTACH]106449[/ATTACH]...Leave a comment:
-
Samsung PS43F4505AWXXE no picture/sound
The plasma tv have 5V stby, an PS_ON at 3.6V. Other voltages are 0. Suspect the mainboard wont start the psu?
Mainboard partnr; BN94-06194L is hard to find, any one knows about the difference the last letter indicates, found these alteratives; X,B,A,C,Y,W,N, but not the L version?
Regards
Dag Arne -
Re: New Members - please post your introductions here
Hello, Dag Arne From Norway, formally educated as an electronic tech, when it still was fordable to repair AV/comp equip, back in 80/90s. Havent been practiced much lately, and need some updating, and this site was good on electronicknowledge.Leave a comment:
No activity results to display
Leave a comment: