Re: Sony KDL-46EX500 2 blinks, then 6 blinks
Thank you budm.
I have already read the attached document (I spent so much time on this forum ;-), and it helped me to understand and solve the problem...
chrisl32
Member
Last Activity: 09-04-2024, 09:30 AM
Joined: 02-15-2021
Location: occitanie
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Last edited by chrisl32; 04-28-2021, 02:49 AM. -
Re: Sony KDL-46EX500 2 blinks, then 6 blinks
And you are probably right, because the inverter is integrated in the powerboard card, and I suspect that this part is faulty.
The clue for me was that the T6801 transformer was buzzing in the audible range, it should not have as it should be working at high frequency...50KHz or so ......Leave a comment:
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Re: Sony KDL-46EX500 2 blinks, then 6 blinks
I'm back.
The TV works again !
After new tests and more reflexions, I became pretty sure that the problem came from the powerboard card.
And I had the chance to find a second hand powerboard card on eBay for 45€ in Italy.
I received it today, and the TV works perfectly now :-)
I would have loved to repair it at component level, but I was lacking of information (and of personal technical knowlegde).
So, as it may interest someone in the future, I made measurements on this working unit :
...Last edited by chrisl32; 04-27-2021, 10:35 AM.Leave a comment:
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Re: Sony KDL-46EX500 2 blinks, then 6 blinks
Thank you kasfamily. So 24V zeners .. I'll continue my tests.Leave a comment:
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Re: Sony KDL-46EX500 2 blinks, then 6 blinks
Thank you very MUCH for ...
...
Leave a comment:
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Re: Sony KDL-46EX500 2 blinks, then 6 blinks
Yes ! Thank you very for your support
I’ll do that !Leave a comment:
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Re: Sony KDL-46EX500 2 blinks, then 6 blinks
I do not have a LED tester specifically, but my T7 tester does test zener...Leave a comment:
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Re: Sony KDL-46EX500 2 blinks, then 6 blinks
Hello,
I tried with bad results. It is a 702 Mosfet, and the tester only sees the diode between source and drain, but nothing on the gate...
Is it faulty or is it due to the fact that it is soldered...
Before desoldering ZD104 and ZD107, I'd like to know their type.
And I did not find that on Google...
What a mess
[url]https://www.badcaps.net/forum/attachment.php?attachmentid=234448&stc=1&d=1618046449[/url]Re: Sony KDL-46EX500...Leave a comment:
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Re: Sony KDL-46EX500 2 blinks, then 6 blinks
No, it is ok, it is just the photo.
But I see strange results for the zener diodes ZD104 and ZD107
What I read on them (very hard !) is "95" or "U5"
When I test them with the T7 (no desoldered), I get:
7.18V___ on the ZD104 and
23.3V___ on teh ZD107.
When the TV is on, I measure :
12V on both on them !
I think I'll try to desolder them tomorrow... because I have to leave now.
Many...Leave a comment:
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Re: Sony KDL-46EX500 2 blinks, then 6 blinks
I already did that ... all is good.
I'll check again anyway...Leave a comment:
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Re: Sony KDL-46EX500 2 blinks, then 6 blinks
Yes, thank you !
I'm working on a rough schematic of the inverter board...Leave a comment:
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Re: Sony KDL-46EX500 2 blinks, then 6 blinks
The 4 zener seem to be OK ( but without dessoldering them)Leave a comment:
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Re: Sony KDL-46EX500 2 blinks, then 6 blinks
I checked the other pins :
1, 2 3 and 4 are connected to ground
8___12V
7___0.08V
6___6.24V
5___0.22V
These values are NOT changing wether T6801 buzzes or not.
Is this normal ?
I'll try to follow the tracks around the LM2903 to see what is going on ...
[url]https://www.badcaps.net/forum/attachment.php?attachmentid=234384&stc=1&d=1617965463[/url]
[url]https://www.badcaps.net/forum/attachment.php?attachmentid=234385&am...Leave a comment:
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Re: Sony KDL-46EX500 2 blinks, then 6 blinks
Good idea.
But I get 12 V
Leave a comment:
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Re: Sony KDL-46EX500 2 blinks, then 6 blinks
Thank you dick_barton
i checked C6618 :
with T7 tester :
C=976 nF __ Vloss=0.1 % __ ESR=0.23 ohm
with Fluke :
C= 980 nF
I really have no luck ... all my tests show good components !
I'd like to test HV1 and HV2, but the tension is of course too high for my testers.
Maybe is it a faulty IC ?
If I could have a schematic with planned tensions ...Leave a comment:
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Re: Sony KDL-46EX500 2 blinks, then 6 blinks
Does anybody have any idea where to find the inverter board ssb460 schematics ?Leave a comment:
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Re: Sony KDL-46EX500 2 blinks, then 6 blinks
This photo shows the reality well concerning the very weak intensity of the SONY logo during its very brief appearence (less than 1 second during the transformer buzz)....Leave a comment:
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Re: Sony KDL-46EX500 2 blinks, then 6 blinks
I am sorry, I forgot to attach photos in my first post....Leave a comment:
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Re: Sony KDL-46EX500 2 blinks, then 6 blinks
budm gave the link to his redlined power supply schematic in this post :
[url]https://www.badcaps.net/forum/showth...607#post372607[/url]
and wrote :
"OK, this is how the board functions. I can explain in details as needed."
In his redlined power supply schematic, he writes in yellow squares :
LD = 11-12V = OK
and FB 0V = BAD
As my measures are :
LD = 12.10V and 12.09V during buzz
FB = 0,04V AC during buzz
Do you think...Last edited by chrisl32; 04-05-2021, 08:55 AM.Leave a comment:
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Re: Sony KDL-46EX400 2 blink error code
sorry ... wrong threadLeave a comment:
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