Sony ICF-C180 Alarm Clock Mods to reduce brightness in "dim" mode
My Sony ICF-C180 is a good clock, but it has a few annoyances. The main one is the brightness in "dim" mode. It is bright enough to read by, if I hold the book close. Way to bright for my sleeping preferences. I modified the low-brightness current limit resistors to allow me to set my preference. I'll wait until dark to do the actual setting, but I should have enough range. Here is what I did to void my warranty:
Two terminals of this 1k pot are soldered in place of the 100 Ohm (101) resistor that controls the dim green lights for the main display backligting. Yes, I know that the left terminal doesn't look like it is soldered well. I went back and re-touched this joint after seeing this picture. The camera is better than my magnifying glass.
After I got the brightness under control, I began to worry about how easy it was to change the time zone or to change into weekend mode. I opened the case, removed the push-button board, and shortened the actuators and stops on the back row of buttons as shown in the picture. I cut the stops by the same length as the actuators, which I cut flush with the back of the key.
Possible future project:
Change the LCD bias to give visibility from the 6 o'clock viewing angle