The scanner can be opened by removing 6 screws. The circuit board containing the key contacts and the display can be removed by unscrewing 2 screws as indicated on the board.

To access the receiver board, detacht the metal shield by removing another two screws.

The unfiltered audio can be found at the test point marked 'DISC'. With the next steps, a discriminator output is made:

• Solder a 10 k resistor to test point 'DISC'.
• Connect a piece of insulated wire to the resistor's other lead
• Remove the indicated SMD resistor (marked '100')
• Connect the other end of the wire to the left cleared solder pad

Using a stereo 3.5 mm plug, the headphone signal is available between the tip and ground. The discriminator output is available between the middle ring and ground.