D
djtaylor1
Guest
Hi
I'm about to investigate why my Sony TV won't respond to the IR control. That works on a different TV, TV won't respond to other control.
It could be a bad connection in the interconnect cable or dry joint or whatever but the circuit is absolutely trivial. From the IR board it goes straight to an input pin of an 8051 microcontroller. I do have the service manual.
Should this turn out to be a duff IC on the IR board, what's a good source of TV parts? Preferably mail order and DIY'er friendly?
The only part on the IR board is an IC which i've tracked down as being a National Semiconductor BX1387 and appears to be an all in one IR Diode, with an op amp followed by some shaping. It only has 3 pins.
David.
I'm about to investigate why my Sony TV won't respond to the IR control. That works on a different TV, TV won't respond to other control.
It could be a bad connection in the interconnect cable or dry joint or whatever but the circuit is absolutely trivial. From the IR board it goes straight to an input pin of an 8051 microcontroller. I do have the service manual.
Should this turn out to be a duff IC on the IR board, what's a good source of TV parts? Preferably mail order and DIY'er friendly?
The only part on the IR board is an IC which i've tracked down as being a National Semiconductor BX1387 and appears to be an all in one IR Diode, with an op amp followed by some shaping. It only has 3 pins.
David.