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Search: Posts Made By: budm
Forum: Troubleshooting TVs and Video Sources Today, 01:23 PM
Replies: 1
Views: 15
Posted By budm
Re: LG TV 42LE5500 Power on,backlight ok but picture is bad

Does this TV have stand alone T-CON board or integrated T-CON as part of the LCD panel?
If it is stand alone, what do you see on the screen if you have one ribbon cable between LCD panel and the...
Forum: Troubleshooting TVs and Video Sources Today, 09:37 AM
Replies: 2
Views: 25
Posted By budm
Re: Toshiba 37RV530U - No standby LED, no reaction to power button being pressed

1) We need to see the pictures of the whole backside of the TV showing all the boards.
2) We need good clear straight shot for the whole top and bottom side of the power supply board.
3) We need...
Forum: Troubleshooting Audio Equipment 07-13-2019, 08:44 PM
Replies: 18
Views: 5,848
Posted By budm
Re: Replacements for ceramic "cement" resistors on crossover?

What ever style you change them to, they have to be non-inductive type resistors.
Forum: Troubleshooting TVs and Video Sources 07-13-2019, 08:39 PM
Replies: 6
Views: 134
Posted By budm
Re: VIZIO M551D-A2 completely dead

Thanks for the follow-up.
Forum: Troubleshooting TVs and Video Sources 07-13-2019, 12:36 PM
Replies: 1
Views: 58
Posted By budm
Re: Panasonic LCD TV TH-L32C4K (power board problem?)

Try turning down the backlights (not brightness) level to as low as possible to see if it will stay on longer.
Forum: Troubleshooting TVs and Video Sources 07-12-2019, 10:31 PM
Replies: 7
Views: 127
Posted By budm
Re: Sharp led strips

Need to provide the LCD panel model number also.
Forum: Troubleshooting TVs and Video Sources 07-12-2019, 05:33 PM
Replies: 34
Views: 422
Posted By budm
Re: Main board Magnavox 32ME402V/F7

There are many free online electronics learning sites:
https://www.learnelectronicsonline.com/
http://www.learnabout-electronics.org/
Forum: Troubleshooting Audio Equipment 07-12-2019, 12:48 PM
Replies: 4
Views: 95
Posted By budm
Re: harman kardon onyx studio power problem

Please upload good clear pictures so we can see what we are dealing with.
What are the original battery?
When did this issue occur?
Was it working OK with battery before?
Forum: Troubleshooting TVs and Video Sources 07-12-2019, 10:01 AM
Replies: 4
Views: 83
Posted By budm
Re: UN55fh6200 Rebooting when warm

I would also remove the LED connectors, power supply to main board connectors and inspect them to see if any one of them has the sign of over heating, also try tapping on the boards, check board...
Forum: Troubleshooting TVs and Video Sources 07-12-2019, 09:57 AM
Replies: 43
Views: 2,355
Posted By budm
Re: TCL - L50E3020FS not turning on

So it looks like boost converter goes into shutdown mode. This panel has 8 LED strings so it can be that one or more is bad, You will have to check the Voltage at each one of the VLED- pin each time...
Forum: Troubleshooting TVs and Video Sources 07-12-2019, 09:48 AM
Replies: 34
Views: 422
Posted By budm
Re: Main board Magnavox 32ME402V/F7

So C3214 is showing 1.5 Ohms on the bad board, so try removing that C3214 first. But remember this, there are other caps that is connected in parallel with C3214 also, so it does not mean for sure...
Forum: Troubleshooting TVs and Video Sources 07-12-2019, 09:37 AM
Replies: 19
Views: 252
Posted By budm
Re: Panasonic tx55cr730b no picture

Did he match the P/N for the PCB assembly as printed on the sticker NOT the PCB P/N as printed on the board?
Forum: Troubleshooting TVs and Video Sources 07-12-2019, 09:34 AM
Replies: 8
Views: 1,855
Posted By budm
Re: Insignia NS-48D510NA15 Won't Power Up

First thing you need to do is to make the Voltage measurement on the power supply connector that goes to the main board when TV is off and when power switch is activated so we can see what it has and...
Forum: Troubleshooting TVs and Video Sources 07-11-2019, 09:45 PM
Replies: 4
Views: 83
Posted By budm
Re: UN55fh6200 Rebooting when warm

So how low of the backlights (not Brightness) level you turn it down to?
Pictures of the back side of the TV showing all the boards so we can see what we are dealing with?
Forum: Troubleshooting TVs and Video Sources 07-11-2019, 09:41 PM
Replies: 43
Views: 2,355
Posted By budm
Re: TCL - L50E3020FS not turning on

No boosted Voltage at the moment.
Keep the meter probes on the Plus and minus legs of C95, then turn on the TV to see how high the Voltage jumps up to before settling down to 23.74V.
There two...
Forum: Troubleshooting TVs and Video Sources 07-11-2019, 02:16 PM
Replies: 8
Views: 90
Posted By budm
Re: Lg 37lf2510

"11-7.76
12-6.78
13-7.04"
That is not right.
Forum: Troubleshooting Power Supplies and Power Supply Design 07-11-2019, 02:14 PM
Replies: 8
Views: 309
Posted By budm
Re: Bypassing Passive PFC In ATX Power Supplies

NTC has nothing to do with efficiency, once the NTC gets hot the resistance will go down but will not be 0 Ohms so you will have power loss on the NTC.
The purpose of BTC is to limit the inrush...
Forum: Troubleshooting Game Consoles & Other Weird Devices 07-11-2019, 12:38 PM
Replies: 34
Views: 439
Posted By budm
Re: Turn 100v X-box 360 adapter into 250v

Go ahead then without the lamp in place.
Forum: General Electronics Technical Discussion 07-11-2019, 10:11 AM
Replies: 29
Views: 334
Posted By budm
Re: Zero to Expert in pcb design

I used to do the whole project myself from concept on napkin, to mechanical design based on Industrial design concept that the marketing people want, schematic capture, PCB layout, create part...
Forum: Troubleshooting Game Consoles & Other Weird Devices 07-11-2019, 09:56 AM
Replies: 34
Views: 439
Posted By budm
Re: Turn 100v X-box 360 adapter into 250v

Without having it connected to the XBox, do you get 5V the 5V wire?
The power supply draws < 2W in standby mode (PS-ON is not present but 5VSTBY is present), then it will draw lots more current when...
Forum: Troubleshooting TVs and Video Sources 07-11-2019, 09:46 AM
Replies: 34
Views: 422
Posted By budm
Re: Main board Magnavox 32ME402V/F7

I'm not sure what you mean by "both ways" you want me to put the red probe on ground and the black on A also? Reply: Yes.

The normal way black to ground and Red to + I get 14.7 ohms. This is the...
Forum: Troubleshooting TVs and Video Sources 07-11-2019, 09:39 AM
Replies: 43
Views: 2,355
Posted By budm
Re: TCL - L50E3020FS not turning on

OK.
The P-DIM is <1V, so check the Voltage on the P-DIM aging when turning on the TV to see how high it jumps up to and then wait 5 seconds to see what it settle down to.
Your pictures are not...
Forum: Troubleshooting TVs and Video Sources 07-11-2019, 09:31 AM
Replies: 23
Views: 339
Posted By budm
Re: samsung ue55ju6800 problem with brightness

According to SJ, the LCD panel is backlit, but since we do not have any pictures form OP, we cannot verify if that is true or not. Based on OP pictures, it looks like one set of the LED string is not...
Forum: Troubleshooting TVs and Video Sources 07-11-2019, 12:08 AM
Replies: 23
Views: 339
Posted By budm
Re: samsung ue55ju6800 problem with brightness

Hopefully the OP will come back and show us some pictures and some Voltage testing.
Forum: Troubleshooting TVs and Video Sources 07-11-2019, 12:02 AM
Replies: 43
Views: 2,355
Posted By budm
Re: TCL - L50E3020FS not turning on

Are you sure P_ON is 0V?
BTW, can we see the pictures of the whole backside of the TV showing all the board?
Showing results 1 to 25 of 500

 
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