TDA-1541 wrote:Hey guys,
Sorry to hear about your troubles. Make sure you have exhausted all of the other reset options available before opening the unit. I can not be responsible for any damage, yada yada.
The way I interfaced with the unit was to open it up by carefully prying the lid off (almost all Western Digital products are a hard to open as was this unit) then I located the serial com port header. The port is the little white connector in this picture:
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WDTV circuit board | CN4 pinout
| | o o o o |
CN4 | '---------'
.------. | ^ ^ ^ ^
| .... | | / | | \
'------' O | +5V RX TX gnd
Next you will need a TTL-Serial cable. I use an adapted Nokia CA-42 USB to TTL-Serial cable, but you can use whatever cable you want/have. These little serial cables come in handy when working on embedded boards like this. When I made mine, I just knew what to do, but here is some information on how to make a CA-42 into a USB to TTL-Serial cable. I seem to recall that my wire colors were not the same as the ones on this site, so be careful.
Then using my USB to TTL-serial converter (and the information onthis site, which I posted above), I was able to communicate with the unit’s console via PUTTY. You only need to connect the RX, TX, and Gnd. NOT THE 5Volt pin. CAREFUL!!
Once I was in, I attempted to play around and figure out how to get this darn thing back to defaults, but after extensive Googleing and whatnot, I broke down and started this thread. I simply dumped the entire console log here on the site and the people here were very helpful in getting me on my way. After getting the unit to boot and installing the latest firmware, this WDTV Live has served me well and hasn’t acted up at all.
Hope this helps, Let me know how it goes.
3v3/5v TTL - The cables use 5v TTL logic levels but can be made 3v3 TTL Levels (if the 3v3 circuit is not 5v tolerant) by adding a 2.2k ohms resistor between Tx (Red wire) and ground. Note that the power pin will still supply +5v (as do the 3v3 FTDI cables).
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