Sony KD 49X8307C

[Donny2derby]

hahahah,,,, thats cool... nomoresonys on the last list

Yes but only for now! He hasn’t made fun of my soldering skills and has offered solid advice on using resistors instead of copper wire and how to test diodes properly.

You were top of list Diah until you took the piss out of my solder work😅

[Diah]

soldering need 2 things almost... stable hand ( not fat arm man ) and good eyes sight. the reset what to use or how to use just belong to soldering man creative mind.

[nomoresonys]

I can't win this contest, can't concentrate. I'm here in central U.S.A. in late winter but in my mind I'm on the beach in Maui with my toes in the sand and a drink in my hand.

[Donny2derby]

Ok lads. I’ve removed the dodgy links and solder and cleaned the board up best I can. Some small damage to one of the tracks but fortunately it’s to the pin which isn’t connected to anything.

When micro solder tips get delivered tomorrow I will bring them into work and attempt more professional install.

[Donny2derby]

Ok lads the micro solder tips arrived and I have made a more accurate job of linking the pins advised.

i will take the board home tomorrow morning, plug it all back together and try it.

Does this look more suitable Diah?? nomoresonys thanks for the tip about using resistors for the links!

What should I expect to happen now then Diah? Should I get 12v on T-CON fuse? Should the panel come on?

Im hoping to watch the boxing on this tonight at work so the pressures on now😄

[Diah]

first don't put the PSU IN TV... keep it out side alone on the table.. just plug it in wall and measure V DC the 12 V with reference to GND,
we need to be sure there are no damage happened to the PSU....

[Donny2derby]

Ok Diah. Happy days. All 12v pins you asked me to measure to ground give the 12v!

Please advise of next steps. Exciting.

And for next time, to assist my own learning and knowledge. Is what we did a fairly common fault finding procedure which can be carried out on most PSU?

I appreciate what you asked me to perform must be a very simple procedure for you and you must get bored of telling people to do the same easy stuff over and over so I want to be able to carry out the simple stuff for myself which will help me with my own understanding of how things work.

Thanks.

[Diah]

Thanks God yours PSU still a live. so now remove all 3x R you added... clean the points and fit the boards back to TV chassis with screw.

some things to explain about the PSU sockets which connect to Mainboards ... to avoid any mistake by yours side.
you have 2 row of the sockets.. the down one "Red color line" are Odd numbers ( 1-3-5-7-9-11-13-15-17-18-21-23-25-27 )
the one on the Top "blue color" are even numbers ( 2-4-6-8-10-12-14-16-18-20-22-24-26-28 )
the yellow circle are the clip of wires which make it hold at he sockets hole .. ( by pressing it down we can pull " slide out " the wire from it place if it need at testing )



from perverse testing you reported there are 0V on T-CON Fuse .. however you test just now the PSU generate TCON_VCC12V just now... ( it mean the Mainboards didn't send signal to T_CON_ON pins )

there for we will going to help the TV with way to trick the PSU to send 12V to T-CON

A- all sockets LVDS should be connected as original.
B- slide out the wire of T-CON_ON from the socket ( on the top row pin No 24 ) , be sure the end of the wire isolated to avoid it make contact to chassis or any other place ..
C- Insert in the sockets hole 1KR between top row Pins 24 & pins 9 at the low row )

plug in the TV and power it up. , check the screen and the t-con fuse if there 12V on both side with Ref to TV chassis.

[Donny2derby]

Ok Diah thank you for this help and knowledge. Is girlfriends birthday today so I will carry out as you ask tomorrow and report back.

[Donny2derby]

Diah the removal of the core you told me to remove is not particularly easy. The smallest screwdriver I have to hand at the minute isn’t small enough to make a firm contact with the yellow clip which releases the core. I’m trying to remove it whilst pushing down on the yellow clip but it’s not coming out easily.

[lotas]

You don't need a screwdriver here; use a needle, awl or a sharp thin knife to pry the tab (latch) up and pull out the wire.
And there is no need to press anything.

[Donny2derby]

Thanks lotas. I’ve managed to get the core out now. Just rigging up a link from 24-9.

[Donny2derby]

Ok I have performed the test as you describe Diah and sadly there is no life on the screen and also no 12v on T-con fuse.

What I don’t understand though is, there are 4 cables running from CN6401 to the T-con board. 3 grey wires and 1 white.

The core 24 I removed from CN6401 is black and also so is core 9. So that wouldn’t force 12v onto T-con would it?

[Diah]

Ok I have performed the test as you describe Diah and sadly there is no life on the screen and also no 12v on T-con fuse.

What I don't understand though is, there are 4 cables running from CN6401 to the T-con board. 3 grey wires and 1 white.

The core 24 I removed from CN6401 is black and also so is core 9. So that wouldn't force 12v onto T-con would it?

yours jumpers between 9 & 24 didn't make contact with sockets pins inside...... or the TV are off not ON

to know its ON.. pin 9 should have about 3.3V

[lotas]

Without a motherboard, nothing will run, no autonomous system will work here (this is Sony), all commands are executed by the motherboard.

[Donny2derby]

yours jumpers between 9 & 24 didn't make contact with sockets pins inside...... or the TV are off not ON

to know its ON.. pin 9 should have about 3.3V

I have a bench power supply at work Diah. Shall I take pin 9 out of the plug and use the bench power supply to put 3.3v DC on it?

[Diah]

I have a bench power supply at work Diah. Shall I take pin 9 out of the plug and use the bench power supply to put 3.3v DC on it?

what?????? bench power supply ?????????

did you read my post 58

[Diah]

Without a motherboard, nothing will run, no autonomous system will work here (this is Sony), all commands are executed by the motherboard.

yes... i think he still didn't bring all together back

[Donny2derby]

what?????? bench power supply ?????????

did you read my post 58

Post 58 is a post of mine Diah. 68 I did read. A bench power supply is something that you can use for the purpose of voltage injection.

[Donny2derby]

yes... i think he still didn't bring all together back

Everything is plugged back in and screwed down.