On the Internet you will find on some pages a schematic of the Maycom FR-100 radio scanner. When i compared the schematic with my device i found out that this schematic is old.
So some of the used chips i found out.
- Voltage regeulator: MCP 1802 3V http://www.microchip.com/wwwproducts/Devices.aspx?product=MCP1802
- NJM 2073
Pin layout of the 2×10 pin connector.
- Pin 6 -> GND
- Pin 9 -> BAT ( Power )
- Pin 10 -> PWR_ON
- Pin 11 -> IC 26
- Pin 15 -> GND
- Pin 13 -> SPK
to be continued