Re: Vizio vw37l Amber light only will not power on
The voltage regulator came in and I put it in today U7. T.V. works 100%!!!!!!! Yay!!!!
Just wanted to extend my thanks to budm, tom66, johnboy1313, Dgtech and retiredcaps for your help and guidance.
You guys are all over this site helping people and I'm pretty sure no one is paying you to do it. Pretty great stuff. From this guy, many thanks!!!!
swwww
Member
Last Activity: 04-10-2013, 09:46 PM
Joined: 02-23-2013
Location: us
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Re: Sony kdl 37xbr6 Blinking standby light 3 times
Update...
Found F1422 (5A 24V) on main pcb open.
I found reference to this fuse in this other bravia post
[url]https://www.badcaps.net/forum/showthread.php?t=13751&highlight=F1422+%285A+24V%29[/url]
Is it a bad idea to jumper across like the guy in the above post did for testing? ? As shown in my 1st post of this thread, it did not work well for me. although its tempting to try since i don't have any of the fuses in question and i want to see results......
Anyone...Leave a comment:
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Re: Sony kdl 37xbr6 Blinking standby light 3 times
I set this one aside for awhile but am now revisiting it with updated Info.
THE STANDBY LIGHT IS NOT BLINKING LIKE TITLE SAYS... I don't know how to change the title...
I swapped the main pcb out with one I was told was good taken from a unit with cracked lcd so that should have taken care of the "post 1" screw up...
Maybye I should have started a new post... But this is where i am at now.....
I have a sony kdl-37xbr6 that Has sound and backlight with no...Last edited by swwww; 03-15-2013, 12:48 AM.Leave a comment:
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Re: Vizio vw37l Amber light only will not power on
Thats what i was thinking. Thank you for taking the time to help and explain-- I feel I owe ya guys a pint
..
I was trained to component level repair in the us navy about 20 yrs ago but most all of my field experience has been what the navy calls "organizational" level which is board/box/cable/connector with a bunch of signal flow. So its all a bit fuzzy/rusty at best
Ill get u7 swapped and report back...might be a couple days
thanks againLeave a comment:
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Re: Vizio vw37l Amber light only will not power on
Thanks, you guys have been very helpful
Do you have any clarification for your reference to u3 no input voltage tom?
(as it receives essentially no input, it gives no output.) (u3)
so are you are saying no input should not be expected for the conditions ( because of tv not being on) or are you just stating the obvious (no input no output)
Its positioned above the 75ohm output section so i kind of guessed it would not be energized while tv was off??
...Leave a comment:
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Re: Vizio vw37l Amber light only will not power on
Ill give u7 a try and see what develops.
not sure i get what you mean
(as it receives essentially no input, it gives no output.) (u3)
so are you are saying no input should not be expected for the conditions ( because of tv not being on) or are you just stating the obvious (no input no output)
Also...
I do not have an air tool... Are the methods I have read regarding hot iron techniques (heating the tab/globing the legs, ect.) viable...Leave a comment:
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Re: Vizio vw37l Amber light only will not power on
Thank you much for all the info . I really appreciate you taking the time to help clear that up
Do you think that my assumption of why u-3(the 2nd of the largest two regulators, residing on the upper right corner of board)does not have power input is a correct one?
(see my first post) ( i am thinking this part of the board is not active while in standby or is it due to the failure upstream?)
thanks much...Last edited by swwww; 03-08-2013, 12:20 PM.Leave a comment:
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Re: Vizio vw37l Amber light only will not power on
Is it just coincidence that the input of u7 is 2.1 v lower than it should be ( which is the same voltage that the other similar 1117s ground legs are reading--2.1v....
And why would it be low.. Is that a u7 failure or a indication of associated circuitry failure.
Could u7 be shorting 2.1v of its input to ground causing the 2.1v on the other 1117's gound leg?
Or as asked in a previous post, is the ground leg supposed to be off zero on these 1117s...
thanksLeave a comment:
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Re: Vizio vw37l Amber light only will not power on
I reviewed it
did you read all my previous post....Last edited by swwww; 03-08-2013, 03:21 AM.Leave a comment:
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Re: Vizio vw37l Amber light only will not power on
u7 readings are as reported...
Correction on u3
az7805t
I'm not sure why your are saying it should be 1.25v at pin 2 All the rest of the 1117's are as reported pin 2- 3.36v when tested in the same way, same fixed regulator ( I am grounding meter to chassis ground) When grounding to the regulator ground leg The other 1117's give the 1.25 you are referring to (which is 2.1v different) with the exception of u7 which is as reported(w/meter ground on chassis).. there must be a 2.10v ground difference...Last edited by swwww; 03-08-2013, 03:09 AM.Leave a comment:
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Re: Vizio vw37l Amber light only will not power on
u7
amc1117
pin1 -0v
pin2 -.5v
pin3 -3.36v
u33 and all other amc1117's i could find were all the same readings
amc1117
pin1 -2.1v
pin2 -3.36v
pin3 -5.15v
u10
1084
pin1-1.41v
pin2-2.66v
pin3-5.15v
u3
az7805t
pin1-0v
pin2-ov
pin3-85mv
thanks again
scottLast edited by swwww; 03-08-2013, 02:16 AM.Leave a comment:
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Re: Vizio vw37l Amber light only will not power on
Tested all the v-regs I could find... Aside from u-3 2nd of the largest two risiding on the right side not having any input power ( i am guessing this part of the board is not active in standby) all looks good except u7 which is in the middle upper center just below connector has input but no output. Doe this mean its bad? I was getting readings i that trust/understand trying to test the resistor and cap in the area.. (Differed from other readings (ohms) i tried to sample from caps in circuit next to similar vregs in area ) ...Last edited by swwww; 03-08-2013, 12:07 AM.Leave a comment:
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Vizio vw37l Amber light only will not power on
Hi all.
I am trying to diagnose my visio vw37l
I have only orange light
5vdc standby voltage present on output of power supply but no "ps on" signal present at power supply when power button pushed.
I was reading another thread and they suggested unplugging the inverters (the other two output plugs of power supply i'm assuming) with no change.
anyone have any ideas on what to test to isolate (seems like main pcb maybe?)
Two fuses i could find on main pcb by the input cable test fine
I also have...Last edited by swwww; 03-07-2013, 09:35 PM. -
Sony kdl 37xbr6 Blinking standby light 3 times
So I have this sony that had no picture or sound but had backl ight.
I found the fuse f006 on av board open (pretty sure) and mistakenly (stupidly) attempted to jumper it.
I now have a flashing standby light (3 times) and have lost back light also....
Lost power to f006 on av board after jumper attempt. Power supply board outputs seem dead now also.. Main (big) fuse is good on p/s. Auto switching (fuse?) above main p/s fuse is doing an extra click now also...
Any thoughts on how not to screw this up further? (besides the obvious...Last edited by swwww; 02-24-2013, 03:21 AM.
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