JP1 Remotes

The Sony12/15 protocol is what we call a "mini-combo" protocol because it lets you program more than one device code at a time. This is why we recommend that you focus on the device code and OBC when reading learns rather than the EFC or the hex code.


Ok - that I can understand...


Now, back ...

Hi,
I have a URC6131 and a URC8910.
The code for my Sony audio receiver works fine on the 6131 - except that the keybinding used to select component #6 seems to be wrong.

I also have a URC8910, and I used this to learn the correct code from the original Sony remote for component #6.

I downloaded ...

How many times did you try to reflow this part?

I removed it once - and resoldered it back down.


With all the cleaning and "hitting" the pins with the iron are you sure that you didn't lift a pad?

I'm positive - I did not pry the chip off the pads nor pick it off - while keeping all 8 pins ...

An awfull lot of STmicroelectronics' chips are 5.5 volt. Might work great in a 8810 but the 6131 is a 3 volt remote. Try with very fresh batteries (or no batteries). I got my first 6131 to work with a 5.5 volt chip but the first big order to Mouser I watched the ratings on the parts I bought just ...

"24C16" is the right part number. The logo under the "24" is what I use to indicate pin1.

I would take a closer look at pins 5 thru 8 as all of them look like they could potentially be not making contact.


Yeah, I know - it was a poor soldering job in poor lighting.

I took it to one of the labs ...

Ok - they say a picture is worth a thousand words....

http://bigorc.com/eeprom.jpg

Yeah - I now see also that it is on a bit crooked - but I believe all pins
are actually making contact.

I'll have to try re-soldering it using a desk magnifying glass or something.

But - I just want to make sure ...

Hi,
I have a URC-6131 and an "Ultra" kit from here: http://jp1.filebug.com/kits.htm

I also ordered the 2k eeprom along with the cable kit.

I have installed the eeprom and the 6 pin header, and then built the cable
as per the excellent instructions.

The eeprom seems to be installed properly ...