Transistor for TV problems

[budm]

Re: Transistor for TV problems

I am not sure if this EEPROM problem or not, look at shopjimmy website to see.
The metal shield is for the main processor.

[aaronwt6]

Re: Transistor for TV problems

My personal experience on almost every Vizio main board from this era is as follows:

If the screen lights up briefly with the vizio logo then freezes, the eeprom usually fixes it. If there is no backlight as you've describes but the logo changes color, then 95% + of the time it's going to be one or more bad voltage regulators.

[Cue]

Re: Transistor for TV problems

My personal experience on almost every Vizio main board from this era is as follows:

If the screen lights up briefly with the vizio logo then freezes, the eeprom usually fixes it. If there is no backlight as you've describes but the logo changes color, then 95% + of the time it's going to be one or more bad voltage regulators.

What's the difference between a voltage regulator and a transistor? They both look the same right?

[budm]

Re: Transistor for TV problems

They can have the same body case style but the electrical function are not the same.
Voltage regulator IC is an integrated circuit contain many transistors, diodes, resistor, caps, etc.

[Cue]

Re: Transistor for TV problems

They can have the same body case style but the electrical function are not the same.
Voltage regulator IC is an integrated circuit contain many transistors, diodes, resistor, caps, etc.

Is there a voltage regulator on the vizio main board? Or only on the power board?

[budm]

Re: Transistor for TV problems

Yes, there are regulator ICs on the main board.
Your TV has more than one versions so I do not know exact one that you have, they are not cheap.
http://www.shopjimmy.com/catalogsear...q=Vizio+E470VL

[Cue]

Re: Transistor for TV problems

Yes, there are regulator ICs on the main board.
Your TV has more than one versions so I do not know exact one that you have, they are not cheap.
http://www.shopjimmy.com/catalogsear...q=Vizio+E470VL

Can I test a voltage regulator IC in circuit?

[stj]

Re: Transistor for TV problems

yes,
3 pins usually.
one is the input, one is output and one is either ground, or goes through resistors to set the output voltage.

go download a datasheet for a 1117 regulator.
https://duckduckgo.com/?q=1117+datas...t-wt&kv=1&kh=1

[budm]

Re: Transistor for TV problems

https://www.badcaps.net/forum/showth...999#post300999

[Cue]

Re: Transistor for TV problems

This might be a dumb question but do i have to get the exact same Voltage regulator model number or just the same volt number if a voltage regulator tested bad?

[stj]

Re: Transistor for TV problems

same part number, but it does not need to be the same maker.

so an AZ1117-3.3 could be swapped for an LM1117-3.3 for example.
if it's a 1117 you just need to match the voltage.