cnc screwcutting???

[rcaffin]

re checked input pin with 1k resistor with reference to grd
volts output from BOB 5.12v (
volts @ input pin with I k resistor 2.16v

Hi Dale
If a 1k pull-up resistor only gets the input to 2.16 volts, then I think the chip is almost certainly damaged - sort of lightly toasted. Next step is to replace it. Worth having some spare parts anyhow.

Cheers
Roger

[Dale gribble]

Hi Roger,

Thanks for your help, much appreciated. I'll get the repair kit from cnc4pc, it will probably take a couple of weeks to arrive here in the UK. I post my results when the new IC's arrive.

Kind regards

Dale Gribble

[rcaffin]

I'll get the repair kit from cnc4pc, it will probably take a couple of weeks to arrive here in the UK. I post my results when the new IC's arrive.

Hi Dale - if you can photo the top of the chips I might be able to figure out what they are, and maybe you could buy a couple locally - RS Components or similar in the UK.

Cheers
Roger

[Dale gribble]

Hi roger,

Thanks for your offer on identifying the chips, I ordered the repair kit from CNC4PC at a very reasonable price of $9.

Regards

Dale