Sony KDL-46bx450 no red light

[Gootch46]

Re: Sony KDL-46bx450 no red light

Here is all the chips labeled, man that is small writing .... How would a person even know if it was these ? Some test? or would a person just swap these out and see? Thanks again guys been alot of help

[fzabkar]

Re: Sony KDL-46bx450 no red light

I don't get any result when I search for an APL5820. Are you sure it isn't an APL5920?

http://www.anpec.com.tw/searchProduc...eyword=APL5820

FR9884, fitipower, 18V, 3A, 340KHz Synchronous Step-Down DC/DC Converter:


NT5CB64M16DP-CF, Nanya, 1Gbit 64Mx16 DDR3 SDRAM, 1.5V or 1.35V:
http://www.nanya.com/NanyaAdmin/GetFiles.ashx?ID=890

Can you measure the voltages in the highlighted areas? I'm trying to determine which supplies are up and running. I suspect that some supplies may be switched on and off by the SoC.

[Gootch46]

Re: Sony KDL-46bx450 no red light

It probably is a "9" 5920 it was late and eyes were getting tired, Thanks so much for the information and putting the time in for this. Very good info I am going to try and test these points I never knew you could test it down to these chips Thanks again, Opens yet another door for me on some of these tv's.

[freakaftr8]

Re: Sony KDL-46bx450 no red light

Guess it's just me but every time I run across a TV with a MediaTek processor on the main board it turns out that it's either an eeprom problem or the processor itself

[fzabkar]

Re: Sony KDL-46bx450 no red light

Not long ago I helped someone with a MediaTek based PCB. In his case the problem was the crystal.

[Gootch46]

Re: Sony KDL-46bx450 no red light

Well the new main board came and it did fix the problem Thanks again for taking the time to look into this for me, I will in ther future like to look into changing these lil chip sets out , so atleast I have a practice board for removal. What is this "Crystal" you speak of Fzabkar? Anyway Thanks again all
Gootch46

[fzabkar]

Re: Sony KDL-46bx450 no red light

Here is the crystal:

[Gootch46]

Re: Sony KDL-46bx450 no red light

Good to know Thanks

[geeforce]

Re: Sony KDL-46bx450 no red light

Here is the crystal:

How do you test this crystal?