While I don't actually have a T2, the pictures don't make it look like there are any electrolytic caps to go bad. I'd pull the board out and follow the trace from pin 3 on the radio connection to the modem IC. There is a whole mess of .1 and .027 uF caps, probably of the ceramic variety, but I doubt that's your problem. I suspect it's a cold solder joint or a place where the modem has worked itself loose after 3 years of thermal expansion/contraction cycles in a hot car. I'd hook it up to a radio and use a toothpick pr plastic tooth flosser (the pointy end) to lightly press on each of the pins to see if it wakes the device up. On Aug 25, 2010, at 12:25 PM, Bob Poortinga wrote:
> After almost 3 years of faithful service, my T2-135 has gone deaf. Not > completely deaf, just mostly deaf. When first installed it decoded most > everything it heard. Now it only decodes the strongest, clearest signals. > For example, after a two week round trip from Indiana to Colorado, it added > about 25 stations to my Nuvi. I would normally get at least a couple of > hundred stations. This is becoming problematic because it really interferes > with the ability to send and receive APRS messages. > > I have tried removing the radio from the car and attaching it to a base > antenna and power supply with no difference in decoding ability observed. > I know the radio is receiving properly becuase I can see the S-meter jump > and hear the audio when not in digital mode. I have also updated the > firmware which made no difference. > > This is a version 2.1 model. Is there an input cap on this thing that > might have gone bad? Is there anything else that might be causing this > issue? Should I just consider it's time to replace a 3 year old piece > of equipment? > > -- > Bob Poortinga K9SQL <http://www.linkedin.com/in/bobpoortinga> > Bloomington, Indiana US >
