Re: Blaupunkt 23/157I-GB-3B-HBKDU
Unfortunately the story doesn't have happy end. The problem got back. I can't measure power on signal from the main board so I'm searching for a problem.
randomf
Member
Last Activity: 07-07-2017, 01:37 PM
Joined: 12-06-2016
Location: Prague
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Re: Blaupunkt 23/157I-GB-3B-HBKDU
So I have unsoldered nearly all parts apart from the SMD IO (OB3370N) on the LED part of the power supply, measured them with ESR meter, they were all good so I soldered them back to measure signals from the controller and everything started to work. So I guess cold joint.Leave a comment:
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Re: Blaupunkt 23/157I-GB-3B-HBKDU
Under the heatsink closer to the LED connector is MBR20100CT.Leave a comment:
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Re: Blaupunkt 23/157I-GB-3B-HBKDU
I can safely rule out that the LED strip is ok. I bought 4 9V batteries, plugged them in series and sent the output to the Molex connector on the screen. As expected, they all lit up. There are 3 parallel segments per 11 LEDs, I'm looking for ~ 35V.
Back side of the PSU is attached...Leave a comment:
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Re: Blaupunkt 23/157I-GB-3B-HBKDU
Sorry that picture is misleading. Its caused by my torch. No LED is lighted up on that picture....Leave a comment:
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Re: Blaupunkt 23/157I-GB-3B-HBKDU
I use LED tester function on the multi meter and touch each LED with probes (they all light up)...Leave a comment:
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Re: Blaupunkt 23/157I-GB-3B-HBKDU
So I have unscrewed the PSU and removed the covering plastic. The board itself revealed from the bottom LKP-PL034 rev 0.2. However I can't find a schematics online so I can't find out if the output voltage is correct or notLeave a comment:
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Blaupunkt 23/157I-GB-3B-HBKDU
Hello,
I have faulty 23" Blaupunkt TV with dead LED backlight. I've opened the TV, it has Samsung LTA230AN01 HD Ready panel with single 33 SMD LED stripe on a side. I've tested each LED with a multimeter and they all lit up.
According to [URL="http://www.panelook.com/LTA230AN01_Samsung_23.0_LCM_parameter_18694.html"]panelook.com[/URL] the voltage coming to the LED stripe should be 33V but I can measure only 11.7V coming out of a power supply without load. The power supply has label 81-PBE0241-PW11 rev 0.2 (see pictures included). The caps looks ok... -
Re: New Members - please post your introductions here
Hello there. I'm here with some high resolution of a very low resolution and low quality budget Blaupunkt LED TV.Leave a comment:
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