Hi Vince,
I just finished my Micro-Kim over a period of four very enjoyable days. Thanks for bringing the Kim back to life with your replica - it's a real blast from the past! Thanks, too, for the super fast shipment of the three missing caps. Much appreciated.
I'm at a dead end right now. I just powered up the Kim for the first time, and the only indication I have is an illuminated power LED. All six of the 7-segment displays are dark. Here's what I've checked so far:
- No unsoldered pads.
- No cold solder joints.
- No solder bridges (caveat on the last three...none that I see after a careful inspection, anyway).
- All ICs installed with the correct orientation, and all have been reseated.
- JP1 is on, and JP2 off.
I'm powering the Kim with a 7.5V 1000ma power supply.
- Voltage at the regulator input is 7.5V, and 5.0V at the regulator output.
- 5.0V Vcc is present on all chips on the appropriate pins.
- Pressing RS upon power-up has no effect.
I'd check the 1 MHz output of the oscillator to ensure that it is running, but I have no access to either a freq counter or an oscilloscope. My only piece of test equipment is a DVM.
What's my next step at this point?
Thanks!
Rick