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05-22-2022, 08:56 PM
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#1 |
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New Member
Join Date: May 2022
City & State: nassau
My Country: Bahamas
I'm a: Knowledge Seeker
Posts: 6
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Toshiba 55LF621U19 vgh avvd problem
Looking for advice concerning no picture. has back lights and sound. i have vgl -7.89. vgh low at 11.85 and no avvd voltage found, i have few other voltages marked in the pictures. Can anyone tell me which test point is avvd.
All voltages i found are marked in the pictures. No caps were shorted, so maybe someone can point me in the right direction to help narrow the issue down |
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05-22-2022, 10:53 PM
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#2 |
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Badcaps Veteran
Join Date: Oct 2016
City & State: Bakersfield ca.
My Country: usa
Line Voltage: 120VAC 60Hz
I'm a: Knowledge Seeker
Posts: 2,809
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Re: Toshiba 55LF621U19 vgh avvd problem
Did you try disconnecting right side?
__________________
I assume no responsibility for any stupid suggestions I might post. |
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05-23-2022, 05:06 AM
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#3 |
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New Member
Join Date: May 2022
City & State: nassau
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Re: Toshiba 55LF621U19 vgh avvd problem
yes. i also tried the tape method on each one
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05-23-2022, 09:39 AM
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#4 |
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Badcaps Veteran
Join Date: Oct 2016
City & State: Bakersfield ca.
My Country: usa
Line Voltage: 120VAC 60Hz
I'm a: Knowledge Seeker
Posts: 2,809
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Re: Toshiba 55LF621U19 vgh avvd problem
If no shorts you may have a bad dc to dc IC.
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05-23-2022, 11:06 AM
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#5 |
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New Member
Join Date: May 2022
City & State: nassau
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Re: Toshiba 55LF621U19 vgh avvd problem
alright thanks. do you know any good web site i can order tv board smds. one more question. can you verifiy which test point in the photos is suppose to be the AVVD test point.
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05-23-2022, 12:14 PM
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#6 |
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Badcaps Veteran
Join Date: Oct 2016
City & State: Bakersfield ca.
My Country: usa
Line Voltage: 120VAC 60Hz
I'm a: Knowledge Seeker
Posts: 2,809
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Re: Toshiba 55LF621U19 vgh avvd problem
Your vgh looks like vin, not vgh. There are no standard terminology for this.
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05-23-2022, 06:35 PM
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#7 |
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New Member
Join Date: May 2022
City & State: nassau
My Country: Bahamas
I'm a: Knowledge Seeker
Posts: 6
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Re: Toshiba 55LF621U19 vgh avvd problem
alright. il try changing the dc to dc and see what happens.
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05-23-2022, 06:41 PM
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#8 |
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Badcaps Veteran
Join Date: Oct 2016
City & State: Bakersfield ca.
My Country: usa
Line Voltage: 120VAC 60Hz
I'm a: Knowledge Seeker
Posts: 2,809
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Re: Toshiba 55LF621U19 vgh avvd problem
May not be bad voltages. I would check data lines first and see if you have any voltage on them.
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05-24-2022, 04:49 AM
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#9 |
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New Member
Join Date: May 2022
City & State: nassau
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Re: Toshiba 55LF621U19 vgh avvd problem
ok. i will check those out today
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