I assembled the MK152 Wheel of Fortune Kit but when I push the button a single LED lights up and turns off immediately upon release. If I push and hold the button, then the LEDs begin to light in sequence (clockwise), each LED illuminating for one second.
Somethings I’ve noticed about the assembly:
-IC2 was slightly out of its socket on one side. I pushed the chip fully into the socket but operation remained the same.
-IC2’s socket is slightly raised on one side though all of the socket’s pins appear to potrude though the PCB and make contact with the copper pad and the solder.
-I didn’t use a heat sink when soldering. Could this have messed up the diode?
I took out the ICs to touch up the soldering work on the back of the PCB (some joints had parts of the copper pad still exposed). When trying to put IC1 back into place, I bent one of the pins (sorry, I can’t remember which one). Using a pair of tweezers, I put the pin back into its correct shape and inserted IC1 into its socket. Upon restarting the device, it operated in the same manner as described in the first paragraph.
Here is a picture of the front of the kit:
flickr.com/photos/bishop4262 … hotostream
Here’s the back:
flickr.com/photos/bishop4262 … hotostream
I’m not sure what to do next. Any help is appreciated.
P.S.: This is my first time dealing with ICs and it took quite a bit of force to get them into their sockets. And as far as getting them out of the socket, I had to use the little flat head tool that came with my soldering iron to pry them out. Is that normal? I want to make sure I’m not messing up the chips by the way I’m handling them.
Thank You