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Thread Tools | Display Modes |
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#1 |
Senior Member
Join Date: Dec 2013
City & State: cleveland
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![]() Above TV, power on, 8 flashes tested all diodes and electrolytic caps ok
voltages shown on attached photo's. LEDs tested all but one was open so I bridged open LED all light but very dim. Shining torch I can see text on screen but voltage low on led connector. I dont have a remote yet. Any help would be appreciated. Many thanks. |
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#2 |
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![]() Need to remove power board and look at the pins for leds for cracked joints. Common problem.
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I assume no responsibility for any stupid suggestions I might post. |
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#3 |
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Join Date: Mar 2012
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![]() my guess a failed led dragging led voltage down.
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#4 |
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![]() All but one of leds light this was open so I bridged it and all work but very dim would the single bridged led prevent the Pwm from working I wanted to see if the tv was working I would then buy new led strips.
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#5 |
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![]() Most models (Samsung an exception) will shut down the LEDs if the voltage across the array is lower than expected (indicating shorted LEDs). If you want to test, put in a used LED module with same voltage drop.
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#6 |
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![]() Hi guys sorry for late reply checked board no apparent dry joints.
Can I use a resistor in place of bridged open led to correct voltages. If so what would be the resistance I assume these are 3v leds cannot find specs anywhere regarding voltages just says 3v or 6v nothing on strips. I have read that it may be a firmware problem. This is a Digihome 32" Smart TV. Vestel boards as shown in photos. 2 Led strips 11 on each strip wired in series. Many thanks. |
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#7 | |
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![]() Quote:
https://www.badcaps.net/forum/showthread.php?t=24661 |
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#8 |
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![]() Main board and power board numbers shown in attached photos. Cheers.
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#9 |
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#10 |
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![]() Sorry gents been away for a week.
SMDFlea Digihome Model~: PTDR32FHDS5 Made in Turkey. |
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#11 |
Badcaps Veteran
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![]() i doubt if its a firmware issue if the tv is turning on and backlights work too a point what is printed on the led stips also what lcd panel type is used in this set.
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#12 |
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![]() Hi. LED number = VES315UNDB-2D-N21.
No LCD NUMBER I can see. |
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#13 |
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![]() Sorry for late reply sent to China for 2 new strips all lit but all dim.
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#14 |
Badcaps Veteran
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![]() what voltage is on the led connector on the power supply did you get led strips that was 3v leds
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#15 |
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![]() Hi, yes 3volt leds black wire 53.77vdc, red wire 1.68vdc
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#16 |
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![]() Connect a video source to tv (hdmi or dvbt).
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#17 |
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![]() 54V/ 3V = 18 leds.
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#18 |
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![]() Hi ther are 2 strips each strip has 11 Leds -22Leds = 66volts as previously said all lit but very dim.
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#19 |
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![]() Is the power source original? If it is original, replace the circled capacitor.
L.E. For backlight control, the processor commands the BL / ON pin. For intensity the processor commands the DIM pin, Measure on the dim pin if you find any voltage. Last edited by yokoono; 04-14-2022 at 09:38 AM.. |
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#20 |
Senior Member
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![]() No replaced power supply same symptom.
No voltage on Dim pin. |
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