Hi I'm having issues trying to get my Sony A1E to power on.
Which made me wonder, how involved is Android in the booting of the TV?
I'm basing this information on what I can glean from the service manual:
In my Sony A1E for example I see:
BKA which houses the main processor and along with the input/outputs.
DKA which possibly does up-conversion, in the block diagram I see VX1 coming in from the BKA and out to the TCON
TCON timing board which drives the actual panel.
On the BKA there's a sub-system called the U-COM which appears to handle basic power sequencing and fault checking, but based on the block diagram that's not connected to the DKA.
So is the Android operating system responsible for initializing the DKA & TCON?
Or is there some lower layer real-time operating system that's doing the booting and passing off to Android once it's completed the hardware initialization?
Are there UART boot logs somewhere I can better identity what exactly might be hanging the boot-up?
Interestingly the service manual calls out an RS232C with an * for "depends on destinations", but it's not obvious where UART comes out if at all. This RS232C is not mentioned anywhere else in the document.
Beyond the service manual, does Sony provide authorized repair centers schematics and specialized tools? There's a 68-pin flex connector on this BKA board isn't plugged into anything else on the TV and runs to the main processor, but I can't work out what it's for. I also hear a lot about eMMC going bad and having to be replaced. This information isn't in the service manual so is there some other sources of knowledge out there?
I would sincerely appreciate any suggestions or insight anyone might have!
Which made me wonder, how involved is Android in the booting of the TV?
I'm basing this information on what I can glean from the service manual:
In my Sony A1E for example I see:
BKA which houses the main processor and along with the input/outputs.
DKA which possibly does up-conversion, in the block diagram I see VX1 coming in from the BKA and out to the TCON
TCON timing board which drives the actual panel.
On the BKA there's a sub-system called the U-COM which appears to handle basic power sequencing and fault checking, but based on the block diagram that's not connected to the DKA.
So is the Android operating system responsible for initializing the DKA & TCON?
Or is there some lower layer real-time operating system that's doing the booting and passing off to Android once it's completed the hardware initialization?
Are there UART boot logs somewhere I can better identity what exactly might be hanging the boot-up?
Interestingly the service manual calls out an RS232C with an * for "depends on destinations", but it's not obvious where UART comes out if at all. This RS232C is not mentioned anywhere else in the document.
Beyond the service manual, does Sony provide authorized repair centers schematics and specialized tools? There's a 68-pin flex connector on this BKA board isn't plugged into anything else on the TV and runs to the main processor, but I can't work out what it's for. I also hear a lot about eMMC going bad and having to be replaced. This information isn't in the service manual so is there some other sources of knowledge out there?
I would sincerely appreciate any suggestions or insight anyone might have!