I wanted to do a quick adjustment on this before selling it, but I can't find what the voltages should be. I saw potentiometers for Vsus and Vda while I had it open. Didn't see any test points though. There is no panel sticker like Samsung panels have.
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Re: Sanyo DP50741 No Vs or Va voltages on panel sticker or in SM.
Well, I kind of guessed and got it working pretty good. The Va (Vda) was 50.88v, I adjusted it to 51. I searched for a couple hours and found a couple threads where Vs(Vsus) measurements were taken in TVs of this model. 186v seems to be what it is supposed to be. It was 188.9, so it was too high, by almost 3 volts. Picture is way better. I still have 'sparklies' on an all black screen though.------------signature starts here------------
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Re: Sanyo DP50741 No Vs or Va voltages on panel sticker or in SM.
Every plasma panel is different, so you can't use someone else's panel figures.
Since it is a Panasonic panel I really doubt you have maldischarge (I've never seen a Panasonic maldischarge) but instead have a rather more common issue: high brightness.
If the brightness control is set too high, it will cause little green dots, then red and blue dots to appear. This is dithering, it is attempting to generate very low level brightness by flickering pixels rapidly. Not a fault! Simply turn the user menu brightness down until the dots disappear. (Ideally you'd use a 16-235 cal chart to get it perfect.)Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Sanyo DP50741 No Vs or Va voltages on panel sticker or in SM.
It's a panasonic panel.
panasonic panels stopped having that info from 2010 on. P50C2 would be also one to get a guide for voltages. At 188.9 i would have expected 190V was what it may have been set to so i had a bit of a search and one member has posted 190V for the pansonic 50C2.
On the 42" version panasonic model I have
Vs = 191.5V
Vad = -190V
Ve = 125V
Vda = 55V
As far as panasonic panels go, I've never had to adjust after a repair.Last edited by tw2005; 11-29-2014, 04:18 AM.Comment
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Re: Sanyo DP50741 No Vs or Va voltages on panel sticker or in SM.
The highest the Va would go was 52.45. I'm watching a movie on it now, it looks pretty good.------------signature starts here------------
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Re: Sanyo DP50741 No Vs or Va voltages on panel sticker or in SM.
I'm not sure but the panel voltage at the c buffers i think you need to be careful.
I think the point i was trying to make was unless they've been tampered with probably could have been left but i'd expect a good image with that panel.
pretty hard to compare one panel to another and the 42" figures, I just put them there for some idea.Comment
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Re: Sanyo DP50741 No Vs or Va voltages on panel sticker or in SM.
I didn't mean I left it at 52.45, I'd just adjusted it to the nearest volt, which was 51. I missed Toms post above. The little green dots describes it perfectly. I checked the brightness, it's at 32. That's the default setting. But more importantly, I noticed that the black parts of the menu don't have the green dots. So I wonder if it's my HDMI cable, or computer, which is causing it?------------signature starts here------------
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Re: Sanyo DP50741 No Vs or Va voltages on panel sticker or in SM.
Or maybe you're reading to much into it. post an image but I know they started to dial out the power consumption in 2010 models. I would have to have a look a my 42 pana but my FHD has that if you have your nose up to it and noticeably dimmer to 2009 model. If it looks perfect at the normal viewing distance then sounds fine.Comment
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Re: Sanyo DP50741 No Vs or Va voltages on panel sticker or in SM.
It does look good from viewing distance. I have to get close to see the dots.------------signature starts here------------
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Re: Sanyo DP50741 No Vs or Va voltages on panel sticker or in SM.
I was probably reading too much into it. Thanks.------------signature starts here------------
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Re: Sanyo DP50741 No Vs or Va voltages on panel sticker or in SM.
If this was a little bigger, I think I'd keep it for myself. Honestly, I think plasmas have better pictures. I have a 47" LG LCD which I fixed about a year ago. It's time for an upgrade. I want something 52" or better though. Preferably 55".------------signature starts here------------
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Re: Sanyo DP50741 No Vs or Va voltages on panel sticker or in SM.
Yes, this can also be caused by the colourspace being set incorrectly on your graphics cards settings. For a some HDMI TVs it needs to be on RGB instead of YPbPr. Being on YPbPr will cause the black level to be elevated as it shrinks the colourspace from 0-255 to 16-235, all black has min 16 intensity
You 'mericans and your big TVs. I don't get it, 50" is too big for my living room!Last edited by tom66; 11-29-2014, 06:53 AM.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Sanyo DP50741 No Vs or Va voltages on panel sticker or in SM.
The alternative is getting new glasses. I can get a bigger TV for less.------------signature starts here------------
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I have a TCL 55P6US with sound and backlight but no picture. This model does not have a T-CON board, and the right (rear perspective) panel board is fed from the left panel board. I have not been able to induce any change by disconnecting the secondary panel board or the tape cut-off method on the primary board.
There are a bunch of voltages missing on the panel boards. I can't find any shorted caps of the panel boards, and all of the missing voltage rails read in the kiloohms, which leads me to suspect the issue may lie on the circuit board, rather than a short in the panel.
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49UJ6500 LCD panel has a lighter band on top when first powered on. Goes away (or gets much fainter) after TV on for a few min. After powered off for awhile and power back on, same band appears. If powered on immediately after powering off, no or much fainter band. Running the latest firmware.
Disassembled the TV and lifted the LCD panel during testing. Band is on the LCD panel (can see the band on the panel as I lift it slightly) Backlight is perfectly even at the top edge. Double checked LCD panel alignment in the frame and is perfect but since band moved with the panel, its on... -
I had a the above tv qn55q60r that had a bad panel but everything else good. I had another panel here from un55nu6900 with bad leds and melted diffusers.
I put the nu6900 panel in and powered it up and it does work but there are lines vertical lines.
I was trying to change the panel type in the service menu but don’t see my exact panel. Anyway to fix this or someone have similar experience.
the clear picture is the panel type from the service menus on the nu6900. The other 1 is the panel type that was set for the q60r with the bad panel....01-13-2024, 01:57 PM -
- Prior owner tried a replacement main board. No difference.
- Samsung 2x red blinking standby LED = panel fault
- Jumpered FB_TRDY_1 (pin 1 CN1300 left. main tcon->left side buffer boards) and FB_TRDY_3 (pin 95 CN1301 right. main tcon->right side buffer boards) This allows testing individual T-Con (on main board) connection to panel on this Samsung. Found fault on left side (viewing from rear of TV)
- Each side has 2 buffer boards, disconnected left side flex between 2 buffer boards. Fault is on the left most board.
- Tape masking eventually isolated to CN1300 pin 15 (CKV4_GOA) Display
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I came across a 50inch TU8000 that wouldnt start up properly (blinking stand-by light, backlights would cycle on and off).
When i opened it up and removed the power to the mainboard the backlights powered up and everything looked uniform.
When reconnected the mainboard but disconnected the flex cable to the panel i heard the TV startup with the intro sound.
Later I checked for shorts on the panel PCB boards but could not find anything.
When I took a look with the FLIR i noticed the 2 resistors...
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