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Search: Posts Made By: dick_barton
Forum: Troubleshooting TVs and Video Sources 11-25-2019, 01:16 PM
Replies: 14
Views: 186
Posted By dick_barton
Re: Sony XBR-49X700D: Vertical Lines

When you removed the tcon and also when you replaced it did you lift the tabs on the cable connectors to release the ribbon cables or did you pull out/push in?
If you did not lift the tabs to...
Forum: Troubleshooting TVs and Video Sources 11-08-2019, 06:26 AM
Replies: 9
Views: 195
Posted By dick_barton
Re: Top screen color fading

If you check the dc voltage across the two legs of each of those capacitors it cannot measure more than 400V, the rating of each capacitor, otherwise the capacitors would explode.

I can't quite...
Forum: Troubleshooting TVs and Video Sources 11-08-2019, 06:16 AM
Replies: 45
Views: 1,095
Posted By dick_barton
Re: Samsung UN55D6005SF

It's looking more like you have a mainboard fault with the BLU_ON signal not being activated.
Forum: Troubleshooting TVs and Video Sources 11-05-2019, 08:47 AM
Replies: 45
Views: 1,095
Posted By dick_barton
Re: Samsung UN55D6005SF

So with the Tcon disconnected the set stays powered up?. Can you post a photo of the Tcon?
Forum: Troubleshooting TVs and Video Sources 11-05-2019, 04:06 AM
Replies: 45
Views: 1,095
Posted By dick_barton
Re: Samsung UN55D6005SF

BLU On = 0V means the backlights are not being switched on.
If you disconnect the mainboard from the power supply do the backlights come on and stay on?
Forum: Troubleshooting TVs and Video Sources 11-04-2019, 04:42 AM
Replies: 14
Views: 231
Posted By dick_barton
Re: Sony 46EX400 dim picture

It looks as either the lower tubes are not lighting at full brighness (aged) or there is an issue with the inverter.
Forum: Troubleshooting TVs and Video Sources 11-03-2019, 08:09 AM
Replies: 15
Views: 356
Posted By dick_barton
Re: Samsung PS42C450B1W Picture Noise/Solarization

That's a pity. Can you check your voltages as given on page 56 of the manual. The correct voltages for your set will be as given on the voltage label on your set.
Forum: Troubleshooting TVs and Video Sources 10-31-2019, 08:43 AM
Replies: 24
Views: 924
Posted By dick_barton
Re: LG 50PB560B Plasma wont turn on

In another post in this forum about this set they mention the following test points. What voltages do you have.
M_On =
AC_On =
RL_On =
Auto_GND =
17V_Det =
VS_On =
VS_Det =

Service manual...
Forum: Troubleshooting TVs and Video Sources 10-30-2019, 01:46 PM
Replies: 2
Views: 132
Posted By dick_barton
Re: IR sensor is baffling me

There are so few components on the IR board that it would be worth touching up all the solder joints.
Forum: Troubleshooting TVs and Video Sources 10-30-2019, 12:38 PM
Replies: 26
Views: 324
Posted By dick_barton
Re: LG 60LN5400 Blows TCON Fuse

That's a pity. If you did you could have set the current trip to 3Amps and then raised the voltage towards 12V to power the Tcon.
Forum: Troubleshooting TVs and Video Sources 10-30-2019, 12:12 PM
Replies: 26
Views: 324
Posted By dick_barton
Re: LG 60LN5400 Blows TCON Fuse

If it's a 12V supply and a 3 Amp fuse then 4 ohms will result in 3 amp current flow which it right at the fuse maximum rating. Anything less than 4 ohms will result in the fuse blowing.
Do you have...
Forum: Troubleshooting TVs and Video Sources 10-30-2019, 11:58 AM
Replies: 14
Views: 328
Posted By dick_barton
Re: Philips 55PUT6201/12 no backlight

Can you give the names as shown in the red box and the voltage you read at the corresponding connector pin. Picture still too blurred to read the print.
Forum: Troubleshooting TVs and Video Sources 10-30-2019, 11:41 AM
Replies: 26
Views: 324
Posted By dick_barton
Re: LG 60LN5400 Blows TCON Fuse

What is the supply voltage and fuse rating on the Tcon?
Forum: Troubleshooting TVs and Video Sources 10-30-2019, 11:23 AM
Replies: 15
Views: 356
Posted By dick_barton
Re: Samsung PS42C450B1W Picture Noise/Solarization

If may well be an issue with the control board needing to be replaced.

This looks like a possible replacement if you want to try changing it....
Forum: Troubleshooting TVs and Video Sources 10-30-2019, 11:18 AM
Replies: 26
Views: 324
Posted By dick_barton
Re: LG 60LN5400 Blows TCON Fuse

Can you check that the fault is located on the Tcon board or not by disconnecting all the cables to the Tcon and from Tcon to panel and measure the resistance from the Tcon fuse to ground and then...
Forum: Troubleshooting TVs and Video Sources 10-30-2019, 05:40 AM
Replies: 6
Views: 223
Posted By dick_barton
Re: Polaroid TDA-03211C - Strange Spots on Screen

Is it moisture between the layers? I've had something similar a few years ago.
Forum: Troubleshooting TVs and Video Sources 10-29-2019, 01:51 PM
Replies: 15
Views: 356
Posted By dick_barton
Re: Samsung PS42C450B1W Picture Noise/Solarization

https://www.badcaps.net/forum/showthread.php?t=26790
Forum: Troubleshooting TVs and Video Sources 10-28-2019, 09:44 AM
Replies: 25
Views: 330
Posted By dick_barton
Re: Blaupunkt 49/235z Backlight Inoperative

As already said by others it looks like a led problem. Led testers don't test the leds at full current which is why led testers can operate the led strings. Post #8
Forum: Troubleshooting TVs and Video Sources 10-28-2019, 09:35 AM
Replies: 15
Views: 356
Posted By dick_barton
Re: Samsung PS42C450B1W Picture Noise/Solarization

No. It's disconnect the cable from control board to main board and place a jumper link on the control board but |I'm not 100% certain if its's pins 1 to 2 or 3 and 4 which is why I suggested...
Forum: Troubleshooting TVs and Video Sources 10-28-2019, 06:46 AM
Replies: 15
Views: 356
Posted By dick_barton
Re: Samsung PS42C450B1W Picture Noise/Solarization

Do a search of the forum for running the test pattern which will eliminate or otherwise any problem with the mainboard.
Forum: Troubleshooting TVs and Video Sources 10-26-2019, 08:31 AM
Replies: 52
Views: 4,141
Posted By dick_barton
Re: Polaroid P40LED13 powers up then shuts down

Turn the backlights down as low as you can (not the brightness) and see if they stay on longer or even remain on. If that's the case then it is looking like an led(s) problem.
Forum: Troubleshooting TVs and Video Sources 10-26-2019, 08:27 AM
Replies: 4
Views: 97
Posted By dick_barton
Re: campomatic tv secret service menu

You may be able to turn down the backlight using the On Screen Menu. It's the backlight you need to turn down as low as possible to reduce the strain on the leds and not the brightness.
Forum: Troubleshooting TVs and Video Sources 10-25-2019, 12:15 PM
Replies: 58
Views: 836
Posted By dick_barton
Re: Backlights but no picture - No 12v to Tcon board

The board you are working on that's failing to power the Tcon was one you've just bought?
The one you've just looked at in post#51 is you feel, too expensive to buy for a 4 year old set?

Even...
Forum: Troubleshooting TVs and Video Sources 10-25-2019, 10:18 AM
Replies: 16
Views: 255
Posted By dick_barton
Re: lg 43uh610v schematic

Have the components in the red boxes had their pins cut. One of the connections does not look right.
Forum: Troubleshooting TVs and Video Sources 10-24-2019, 08:51 AM
Replies: 1
Views: 90
Posted By dick_barton
Re: TCP42ST30 6 Blinks

The following repair kits provide the following in their kit
https://www.ebay.co.uk/itm/151128828955

PARTS Q401 Q402 Q421 Q422 Q441 D401 D421
PLUS IC502 AND Q531 WILL FAIL IN 20% OF CASES
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