However, I've now noticed a backlight problem.
I'm not sure whether to attempt the repair since the panel is glued on this model 😣
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totof
Badcaps Veteran
Last Activity: Yesterday, 03:16 PM
Joined: 02-04-2017
Location: paris
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The screen is working now, I also had to replace IC TEA19161 IC which was dead.
However, I've now noticed a backlight problem.
I'm not sure whether to attempt the repair since the panel is glued on this model 😣
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Yes, I reset the TV....Leave a comment:
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I have found this one and it works well :-)
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hi, i am looking for the IC1604 SPI for a Samsung UE55MU6405K -BN41-02568B / BN94-12401R - Version panel CY-KM055HGEV1H.
The TV doesn’t start and no led on standby state.
Thanks
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Indeed, you're probably right. I'll try it with that value....Leave a comment:
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Hello,
I found the reference for component IC621; it's TEA19162T.
I've found the values ​for most of the burnt-out resistors except for resistor R632, whose value I'm unsure of. In the TEA19162T datasheet, it's listed as resistor Rsnscur, which indicates a typical value of 1 kΩ, but mine has three digits and seems to start with 5. Do you have any idea what the value of this resistor should be ?​
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I ordered a VPM1R0A component, this will be my last attempt to save this TV.Leave a comment:
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I'm not sure what you mean by kind of panel.
I checked the caps and none of them are overheating. COFs have roughly the same temperature, around 60 degrees Celsius....Leave a comment:
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I'm sorry, I just realized I should have said thank you Mr. Know-It-All.
I remain interested in information for my problem, even from people less expert than Mr. Davi.p :-)Leave a comment:
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I'm not really surprised by this latest pointless and uninteresting intervention from you. Is there a competition for this type of response ?...Leave a comment:
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I just ran a test by attaching a small heatsink to the VPM1GMA component. The vertical lines eventually appeared, but after 4 to 5 minutes instead of one.
Since the output voltages of the component are stable, I don't see what else I can test. Cooling it with a freeze spray restores the image to perfect condition.
I could try replacing the VPM1GMA component, but it's impossible to find. Is it compatible with VPM1RT, VPM1R0A, VPMS2RT, or VPMS3RT?...Leave a comment:
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I just took some voltage measurements with the two LVDS cables connected.
VCCA and VCCB at 1.9V
HAVDD at 8.5V
AVDD at 17V
VGH at 31V, but drops slightly to 30.7V when the vertical lines are present....Leave a comment:
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I'm struggling to identify the burned-out components.
My biggest problem is identifying the PWM controller (IC621) that drives the burned-out MOSFET Q621.
Pin 1 drives the gate via two resistors in series, both of which are burned out: R627 (? ohms) near the controller and R628 (22 ohms) near the MOSFET.
Pin 2 is GND, and pin 3 is connected to the source of Q621 via resistor R632 (? ohms), which is also burned out.
My friend ChatGPT suggested several controllers (OB226x, NCP120x, or FAN675x) based solely on the function of pins 1, 2, and 3, but after checking, none of them...Leave a comment:
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I only found one photo online showing some of the components, and resistors R631 and R641 are 0.068 ohms (marked R068).
Unfortunately, I couldn't find anything better.Leave a comment:
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I'm not sure what conclusions to draw from the tests.
How can it be explained that simply cooling the VPM1GMA component restores the image to normal ?
I could try attaching a small heatsink to this component to see what happens.Leave a comment:
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I gave up on the repair, end of story.Leave a comment:
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Yes, they are also faulty...Leave a comment:
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Here's what I get right from startup :
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I'have connected the two point.
Photo when only top LVDS is connected :
Photo when only bottom LVDS is connected (first on startup and second/third one minute later) :
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