What's Inside/No FCC ID?

A project log for Reverse Engineering The Midland WR120-EZ

Attempting to re-band the radio into the ham band as well as develop a tool for backup and restore via serial using the built-in clone port.

Signals Everywhere/KR0SIVSignals Everywhere/KR0SIV 07/20/2017 at 02:380 Comments

Normally when working on any electronics project the first thing I do is grab the FCC ID. Something everything with some type of radio will have and nearly any electronic device as well. A company like Midland not having such an ID struck me as odd.

Nevertheless I started tearing into it and seeing what there was to this odd little radio.

Here is what I found

Masked CPU

Masked CPUSeveral Test Points but no other indications

Unknown Chip With Test pads

Unknown chipTest pads check voltage, no indication of data

Finally, something I can play with. A Winbond flash memory chip.

Winbond 25x40bvnig 8SOIC ChipWinbond 25x40bvnig 8SOIC Chip : Click for datasheet

A UTC petw chip used as an audio amplifier for the Alerts

UTC ChipUTC MC34119L: Click for datasheet

Possible JTAG Header