Bay-Tek Piano Keys Service Manual page 21

WIRING DIAGRAM
KEY SENSORS AND KEY LIGHTS
Key Sensors
Four sets of sensors
per this example
AACB3400A
Key Lights
Four sets of LED's
per this example
Normally Blocked - so LED is ON
Once key is pressed, Sensor is not
blocked, so LED is OFF
AACE13021
CE13003
Each Red and Black wires
go up to the marquee to
power marquee key lights
CE13002 CE13000
CE13001
CE13021 CE13021 CE13021
CE13021
AACB13000
Key Controller
Board
Red LED is Power.
Yellow LED is ON
when board is com-
municating to the
motherboard via USB
cable
A5CBL5900
USB Communication
to Motherboard
AACE13017
From Power
Distribution
Board
21