Kerry Wong writes:
In my last post, I showed my LED backlight mod of the HP 8642B synthesized signal generator. And during the process, I also showed some pictures of the A1 (keyboard and LCD) module and A2 (modulator) module alone with an intriguing Easter egg message in the firmware. In today’s post, I will do a full teardown of each module and take a closer look at what’s inside.
Since I had already posted the pictures of the A1 and A2 modules, I will not repeat them here. Here’s a picture showing the reverse side of the top cover. It has a detailed layout map of what’s inside the unit. For this teardown, we will go module by module from left to right (A6 to A17 and then A17).