Re: PWTV8K42ASA1 Visio Power Supply Testing
Thanks, that's correct. Already did it by trial and error, but using logic. A positive signal has to be driven to on/off pin. Voltage reading wa 330 acv. Thanks again. This means the screen is a ctl, not LEDs. Voltage for LEDs is around 90 to 95 DCV, as seen on some other tvs I had repaired.
Conclusion: There is not any signal from the main board to turn on the high voltage stage. Will look into it this week. Thanks to all that got interest in helping me out. As a matter of fact, there was a member that suggested...
torrespedroa
Member
Last Activity: 05-23-2017, 02:38 AM
Joined: 11-26-2014
Location: Villalba
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Re: PWTV8K42ASA1 Visio Power Supply Testing
Still looking how to manually turn on the high voltage section feeding the screen LEDs . Thanks.Leave a comment:
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Re: PWTV8K42ASA1 Visio Power Supply Testing
[QUOTE=torrespedroa;746525]Re: PWTV8K42ASA1 Visio Power Supply Testing
[QUOTE=torrespedroa;746525]...Leave a comment:
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Re: PWTV8K42ASA1 Visio Power Supply Testing
Does the main board have to do with the power/standby leds in from of the TV? There are No lights there. Thanks...Leave a comment:
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Re: PWTV8K42ASA1 Visio Power Supply Testing
Thanks for all inputs. What two wires need to be jumped to activate the power to the LEDs ? I have a homemade CFL tester to conduct this test. Thanks. Is it ok to use a 1k oh ohms resistor as a jumper? ThanksLeave a comment:
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Re: PWTV8K42ASA1 Visio Power Supply Testing
[QUOTE=torrespedroa;746525]
This pic. is better focused...Re: PWTV8K42ASA1 Visio Power Supply Testing
[QUOTE=torrespedroa;746525]
This pic. is better focused...Re: PWTV8K42ASA1 Visio Power Supply Testing
[QUOTE=torrespedroa;746525]
This pic. is better focused......Leave a comment:
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Re: PWTV8K42ASA1 Visio Power Supply Testing
[QUOTE=dick_barton;746518]Can you also post a picture of the underneath of the board.
What voltages if any do you have on CN902[/QUOTE
Voltages on CN902
Ground to pin1=0
To pin 2=0
To pin 3=0
To pin 4=5VDC
To pin 5=5VDC
Pins 6-8 are ground
Ground to pin 9=12VDC
To pin 10=12VDC
To pin 11= N/C
To pin 12=0
Attached solder side pic.Re: PWTV8K42ASA1 Visio Power Supply Testing
[QUOTE=dick_barton;746518]Can you also post a picture...Leave a comment:
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Re: PWTV8K42ASA1 Visio Power Supply Testing
Bridge rectifier working fine....Leave a comment:
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Re: PWTV8K42ASA1 Visio Power Supply Testing
Main cap voltage is 168DC...Leave a comment:
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Re: PWTV8K42ASA1 Visio Power Supply Testing
Will get voltages readings later. Here is the connector pic. Thanks for your input....Leave a comment:
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Re: PWTV8K42ASA1 Visio Power Supply Testing
Dear friends: I'm sorry for the vague of my request. Next time will do my homework before posting.
What we have here is a dead 22" inches Vizio tv model VA22LFHDTV10T. No standby, no red led....no nothing. As you may know this is a pwr sup./inverter board. It does power both, main board as well as the LEDs.
TV started by first turning on and going off after a few minutes. Kept doing this for a couple of days....finally staying dead at all. Attached are board pics. Thanks for any help. Hope being more explicit will get...Last edited by torrespedroa; 05-18-2017, 02:21 PM.Leave a comment:
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PWTV8K42ASA1 Visio Power Supply Testing
Good morning everybody: How can I test subject PS outside the tv? Thanks
This PS is for Vizio VA22LFHDTV10T -
Re: New Members - please post your introductions here
Hi everybody....do not remember if I already posted first time user message....long time ago I joined Badcaps....anyway, here I am again. Best regards to all.Leave a comment:
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