Hi can I get some help my TV White Westinghouse LTV-30W2 will work for about 20 minutes and then the screen goes dark with blue power light still on. I check the screen with a flashlight to see I can on image but the screen is completely dark.
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Re: Westinghouse TV LTV-30W2
Can you upload good clear pictures of the boards so we can see what we are dealing with?Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Westinghouse TV LTV-30W2
The whole back side so we can see how all the boards are connected together, then the power supply and inverter boards.
We need to locate the BL_ON signal pin.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Westinghouse TV LTV-30W2
Attached FilesComment
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Re: Westinghouse TV LTV-30W2
Attached FilesComment
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Re: Westinghouse TV LTV-30W2
I download the pictures, will get back to you.
There are some labels by the 2 connectors on the inverter board. Can you pot what they are?Last edited by budm; 06-14-2013, 09:02 AM.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Westinghouse TV LTV-30W2
CN1
Pin 1 = Vin
pin 2 = Vin
Pin 3 = Vin
pin 4 = Vin
Pin 5 = Vin
pin 6 = GND
Pin 7 = GND
pin 8 = GND
Pin 9 = GND
pin 10 = GND
Pin 11 = GND
Pin 12 = I/O
CN2
Pin 1 = Vin
Pin 2 = Vin
Pin 3 = Vin
Pin 4 = Vin
Pin 5 = Vin
Pin 6 = GND
Pin 7 = GND
Pin 8 = GND
Pin 9 = GND
Pin 10 = GNDComment
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Re: Westinghouse TV LTV-30W2
CN1
Pin 1 = Vin
pin 2 = Vin
Pin 3 = Vin
pin 4 = Vin
Pin 5 = Vin
pin 6 = GND
Pin 7 = GND
pin 8 = GND
Pin 9 = GND
pin 10 = GND
Pin 11 = GND
Pin 12 = I/O
CN2
Pin 1 = Vin
Pin 2 = Vin
Pin 3 = Vin
Pin 4 = Vin
Pin 5 = Vin
Pin 6 = GND
Pin 7 = GND
Pin 8 = GND
Pin 9 = GND
Pin 10 = GNDComment
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Re: Westinghouse TV LTV-30W2
The listing of CN1 does not look right, from the pictures, I cannot see real well since it is not in focus, I can see that pin 11 does not look like the word GND in on that pin. Can we get good clear close up of those two connectors? There has to be a pin with the word 'on/off' (or BL_ON or Ibv_on), and another pin with the word 'DIMM).Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Westinghouse TV LTV-30W2
Attached FilesComment
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Re: Westinghouse TV LTV-30W2
Attached FilesComment
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Re: Westinghouse TV LTV-30W2
I just uploaded some new close up picturesComment
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Re: Westinghouse TV LTV-30W2
OK, that is better, pin 12 I/O (same as BL_ON) is the inverter on/off control pin, when it receives >3VDC from the main board, that will turn on the backlights, PIN 11 is the backlights Dimming control signal which also comes from the main board.
So using DC voltmeter, black probe to the chassis and use red probe to check the 24V pin to see if the 24V goes away, then check the I/O pin to see if that goes away also when the TV blackout.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Westinghouse TV LTV-30W2
Yes there is no voltageComment
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Re: Westinghouse TV LTV-30W2
I get no voltage from the 24V pin. what next to check for.Comment
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