Badcaps.net Forum
Go Back   Badcaps Forums > Search Forums
Register FAQ Calendar Search Today's Posts Mark Forums Read

Showing results 1 to 25 of 500
Search took 0.21 seconds.
Search: Posts Made By: budm
Forum: Troubleshooting TVs and Video Sources Yesterday, 09:20 PM
Replies: 6
Views: 100
Posted By budm
Re: Samsung tv capacitor identification

Samsung tech talk: Samsung D7000 series
Forum: Troubleshooting TVs and Video Sources 10-15-2018, 11:32 AM
Replies: 9
Views: 122
Posted By budm
Re: Sharp LC-37D64U - no power

Your readings do not make any sense to me, you have 8 pins on the primary side of the transformer, 2 of them are not used....
Forum: Troubleshooting TVs and Video Sources 10-15-2018, 09:25 AM
Replies: 9
Views: 122
Posted By budm
Re: Sharp LC-37D64U - no power

Are you using the chassis as the reference GND for the meter wen you make the measurement in the hot side of the circuit? When working in the hot side you need to use the negative leg of the main...
Forum: Troubleshooting TVs and Video Sources 10-15-2018, 09:21 AM
Replies: 37
Views: 363
Posted By budm
Re: Sony KDL-40S5100

At this point since you are able to get the light source to work then if the main board is OK, beside of sending too low of the BL-ON signal, the T-CON and the panel are OK then you should have good...
Forum: Troubleshooting TVs and Video Sources 10-14-2018, 10:01 PM
Replies: 29
Views: 197
Posted By budm
Re: Vizio E55-C2, appears dead, no 20V, main cap always 385V, no PSon

It does look like just the C33 (MLCC) just shorted out which is the typical failure mode for the MLCC.
Forum: Troubleshooting TVs and Video Sources 10-14-2018, 08:12 PM
Replies: 14
Views: 244
Posted By budm
Re: Lg 47lb582v blinking backlight

What is the spec of the replacement LED's?
Did you test as the whole string? I know you test individual LED.
BTW, is your TV the same model and same screen size?
If you look at the LED Voltage you...
Forum: Troubleshooting TVs and Video Sources 10-14-2018, 04:28 PM
Replies: 12
Views: 166
Posted By budm
Forum: Troubleshooting TVs and Video Sources 10-14-2018, 04:22 PM
Replies: 37
Views: 363
Posted By budm
Re: Sony KDL-40S5100

Sounds like the multiple problem on the main board.
Forum: Troubleshooting TVs and Video Sources 10-14-2018, 04:20 PM
Replies: 14
Views: 158
Posted By budm
Re: Hitachi lcd tv L42VK04U not staying on

The control signals for the inverter are generated by the main board, they are just routed through the power supply board for neat wiring.
Forum: Troubleshooting TVs and Video Sources 10-13-2018, 10:40 PM
Replies: 37
Views: 363
Posted By budm
Re: Sony KDL-40S5100

I will not put that transistor in yet until you are able to get the Enable Voltage at the Enable pin of the IC.
So right now with all the board hook up all the Voltage at the pins you report in post...
Forum: Troubleshooting TVs and Video Sources 10-13-2018, 09:44 PM
Replies: 37
Views: 363
Posted By budm
Re: Sony KDL-40S5100

0 Bl_on: but you have a little over 1V before (#post 3) on that pin which is the receiving pit to receive the BL-ON signal form the main board.
Forum: Troubleshooting TVs and Video Sources 10-13-2018, 06:50 PM
Replies: 14
Views: 166
Posted By budm
Re: LG 42LK520 Stuck on LG Logo screen even without TCON?

So all you have is backlights, no active circuit connected to the LCD panel so all the pixels are dead but yet you can see color image on the screen, makes mo sense to me.
Forum: Troubleshooting TVs and Video Sources 10-13-2018, 06:45 PM
Replies: 15
Views: 193
Posted By budm
Re: Vizio E55-D0 Picture Flashes

You have 10 separate control circuits for 10 LED string.
The lower the Voltage on the return pin the more current through the LED string that is because the on time of the MOSFET will on longer so...
Forum: Troubleshooting TVs and Video Sources 10-13-2018, 06:32 PM
Replies: 37
Views: 363
Posted By budm
Re: Sony KDL-40S5100

I went back to look at post #3 and realize that you only have 1.15V on the bl-on pin (CN6154 pin 4), I expect it to be for than 2.5V.
Please verify that R6406 (470 Ohms resistor is OK), it is...
Forum: Troubleshooting TVs and Video Sources 10-13-2018, 04:57 PM
Replies: 11
Views: 134
Posted By budm
Re: Rca 32" RLDED3258A-c only powers up momentarily.

Well the Boost converter is working, the input Voltage to the boost converter is 27V, so when the LED driver shuts down you will only see the feeding the Voltage of 27 V.
105 V without LED connector...
Forum: Troubleshooting TVs and Video Sources 10-13-2018, 04:49 PM
Replies: 15
Views: 193
Posted By budm
Re: Vizio E55-D0 Picture Flashes

If that is the case then it looks like it has open circuit.
There are more than one model of LCD panel used in this TV.
https://www.shopjimmy.com/catalogsearch/result/?q=Vizio+E55-D0
Forum: Troubleshooting TVs and Video Sources 10-13-2018, 04:29 PM
Replies: 15
Views: 193
Posted By budm
Re: Vizio E55-D0 Picture Flashes

The string that has open circuit will show 0V on the Drain pin of he MOSFET on that LED driver board, so how may of them show 0 V on the Drain pin?
The protection circuit probably kicks in die to no...
Forum: Troubleshooting Computer Displays 10-13-2018, 04:16 PM
Replies: 45
Views: 929
Posted By budm
Re: Another HannsG HG281D

OK, sorry I got your thread mixed up with another thread about boards swapping.
Forum: Troubleshooting TVs and Video Sources 10-13-2018, 03:55 PM
Replies: 15
Views: 193
Posted By budm
Re: Vizio E55-D0 Picture Flashes

The 45V is for feeding the Anode of each LED string , the Cathode return of each string is connected to the PWM controlled MOSFET DARIN for maintaining the constant current through each LED string,...
Forum: Troubleshooting TVs and Video Sources 10-13-2018, 03:04 PM
Replies: 15
Views: 193
Posted By budm
Re: Vizio E55-D0 Picture Flashes

You have ten LED strings so it has 10 MOSFET'S on the LED driver board for the Cathode return for each LED string, the Cathode of each LED string is connected to the Drain pin of each MOSFET so if...
Forum: Troubleshooting TVs and Video Sources 10-13-2018, 02:16 PM
Replies: 37
Views: 363
Posted By budm
Re: Sony KDL-40S5100

So that does not look bad, I would try removing the Q6400 and see if the Voltage at the Collector (Backlights/BL-ON/ENABLE) will go up Or not when TV is ON. It has two protection circuits so we just...
Forum: Troubleshooting TVs and Video Sources 10-13-2018, 02:10 PM
Replies: 14
Views: 158
Posted By budm
Re: Hitachi lcd tv L42VK04U not staying on

#1 green wire on psu (standby /on voltages)- 0.6v/0
#2 Pink wire 0/3.38

One of those two wire should be for BL-ON, another one will be for Dim control.'
The Voltage on #1 looks to be too low,...
Forum: Troubleshooting Computer Displays 10-12-2018, 11:25 PM
Replies: 45
Views: 929
Posted By budm
Re: Another HannsG HG281D

One thing that is not really clear to me is that you said you use all the boards from working monitor to connect it to this LCD panel, does mean you also use the T-CON board from working monitor...
Forum: Troubleshooting TVs and Video Sources 10-12-2018, 11:09 PM
Replies: 37
Views: 363
Posted By budm
Re: Sony KDL-40S5100

Emitter leg is at GND so it should be 0V.
Base is also at 0V, that means the MOSFET Q6406 is turned, so the Collector (Backlight/BL-ON, it is connected to the ENABLE pin of the IC through 0 Ohms...
Forum: Troubleshooting TVs and Video Sources 10-12-2018, 08:58 PM
Replies: 11
Views: 134
Posted By budm
Re: Rca 32" RLDED3258A-c only powers up momentarily.

Only one board?
Leave the meter probes on the two legs of capacitor EB801 in that LED driver circuit and then turn on the TV while watching the meter to see how high the DCV jumps up to and settles...
Showing results 1 to 25 of 500

 
Forum Jump


Badcaps.net Technical Forums 2003 - 2018
Powered by vBulletin ®
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 08:38 AM.

Did you find this forum helpful?