jtags bad?

[robm661]

i have buffered jtag from milli it has worked fine in yhe past, so i go jtag a 301.010 and no reading , on the 2.911 jkeys then i change battery a few times check grounds fine , tried it on my 501 no go is there a fuse or common problem after so much use do they weir out , i have xp and have a separate comp i use for jtag ing and so on so it has been changed from about a month ago, any one ever have similar problem please let me know or should i just order a new one thanks

[fubr]

pretty simple device, these things usually dont wear out. I would not think you need to get another one just yet. try to work with that one some more.
unless you really think it is the jtag.

[Crazy1_79]

mili's doesn't have any jumpers. never used to anyway. maybe he changed the kind of one he sells. i havcen't bought one in three years

[robm661]

i cant figure this out i did use this many times on the same pc , with no problems ,tried battery's,good gound ,i even redownloaded jkeys a couple diff versions no luck ,rebootedpc, then i took my 501 real easy ird to read nothing my only conclusion many one of the wires is not tight since its been used so much

[skinerd]

If it is the type where the buffer chip is inside the DB25 shell, it is fairly common for a wire to come loose from one of the connections inside. A lot of connections with small wires in a small area.

I used to use and recommend buffered jtags, have not used one in ages now.
A simple jtag, using 150 or 180 ohm resistors will jtag any and all jtaggable receivers.

[robm661]

If it is the type where the buffer chip is inside the DB25 shell, it is fairly common for a wire to come loose from one of the connections inside. A lot of connections with small wires in a small area.

I used to use and recommend buffered jtags, have not used one in ages now.
A simple jtag, using 150 or 180 ohm resistors will jtag any and all jtaggable receivers. how do u get the numbers with a 150-180ohm and write a tsop to a ird

[skinerd]

how do u get the numbers with a 150-180ohm and write a tsop to a ird

Don't understand the question....

A simple jtag normally calls for 100 ohm resistors, I use 150 or 180 ohm, works fine, I have jtagged hundreds of receivers, never a problem.

I have a DB25 connector with resistors soldered to 2,3,4,5, and 13, then solder wire to the resistors, use it as a temp jtag, don't forget that 18-25 get jumped all together and a wire to them for ground.

The resistors act as a current limiter, and in some cases can even be eliminated, but I would not recommend that. For jtagging 150 to 180 ohm resistors flow plenty current to get the job done.

[Crazy1_79]

i think he is confused about ohms. doesn't know what resistors are or something. buy them at radio shack. 1 buck for 5

[skinerd]

i think he is confused about ohms. doesn't know what resistors are or something. buy them at radio shack. 1 buck for 5

I buy them at Frys, $2 for 100.