BANG! ....oops!

[Oliver Sedlacek]

I think all the chips are available mail order from RS http://rswww.com
I can only imagine that the chip was in backwards.

[danncus]

Following the instructions carefully... i have installed VR sensor EDIS4 and TPS to the car. it ran fine. when i connected up the MJLJR and turned on the ignition,after a four second delay, the chip to the right of the crystal went bang and a piece of silicone embeded itself into my neck!

i have a few questions whilst i wait for the ambulance:

can i get a replacement chip localy? (UK)
what have i done wrong?
should i apply direct pressure to the wound?


thanks in advance

[brentp]

Wow- I never thought electronics could attack like that.

Check the voltages, and check the chip orientation. That's kind of a freakish accident.

Hope you're OK.

[danncus]

thanks guys- yes i'm fine i may have been over reacting a little bit. i will check orienation tonight. how would i put new firmware on new chip, it was (forgive my ignorance) NOT the MAX232.

[danncus]

having checked the chip, it seemed to be in the correct way round ie with the little semi circle faceing the crystal.

[Paratime]

What checks did you make to the MJLJ before hooking it up? Did you try to communicate with it via serial port and computer? Did you check the voltages?

[danncus]

my friend who assembled the board did the checks outlined in the assembly book - buti plugged everything in, edis pip & saw, tps 2x swiched +12 , 2x gnd unswiched and 9pin female to 9pin female serial lead (labeled as NULL ?) with the p.c.plugged in. i think i have found the KX8 processor at rs but dont understand all this bootloader stuff (help!)

[Paratime]

You should not have used a "NULL" serial cable to attach the MJLJ to your computer. These special cables are only for attaching one computer to another computer. Use a standard cable to attach a device to the computer.
But, that shouldn't have made the unit blow. Some of the other wires are probably wrong.

[danncus]

thanks for the advice. i shouln't take too much advice from spotty teenagers, have found fault on board now if only i can work out how to load the KX8!