9. Input Signal Selector
Selects input signal to active the FWD, AFT, INT, or EXT speaker(s).
10. Tone Generator
Generates a horn and alarm sound for the RAY 430. This generator is controlled by the
CPU to produce correct sound patterns and signal timing for various automatic or
manual signal outputs.
11. LCD Driver
U-202 Controls the LCD display.
12. LCD
The LCD is a custom LCD featuring 1 2 characters on a Dot Matrix display. The bar for
the volume and the intercom call numbers are displayed with 16 segment x 8 characters.
13. EL Driver
Drives the EL, controlled by On/Off & Dimmer control knob.
14. EL
Backlights the LCD display.
4—2
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