Yamaha Electone GX-1 Service Manual page 27

Block Diagram (Pedal Section)
—15
=15 7]
PNI-13 @
+15
PNI-15
10 circuits
¥PEDAL I
L TOP )
L TOP (Control
LK
¥ PEDAL II
RHYTHM SYNCHRO START
+18 —'S pg-7
GX-1 (S/ # 5030~ )
KEC-3 386-46