Casio CTK-500 - 11. Care of Your Keyboard; Keyboard Care and Maintenance

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VIN VC VDIN GND VADJ VAOU VAGD VDD VDGD APO
1 2 3 4 5 6 7 8 9
10
1 2 3 4 5 6 7 8 9
10
20 19 18 17 16 15 14 13 12 11
PriGND PriIN2+ PriIN2- PriOUT2 PriGHD PoIN2+ PoIN2- BoostSt. PoOUT2 PoGND
DC
PriIN1+
PriIN1-
PriOUT1
PriGND1
PoIN1+
PoIN1-
BootsSt.
PoOUT1
VCC
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
CLR Q1 D1 D2 Q2 D3 Q3 GND
VCC
Q6
D6 D5
Q5
D4
Q4
CLK
T5, T6: 2SC3112B
1 2 3
E C B
IC1: CA5668
IC2: LA4127
IC3: TC74HC174AP IC4: S8053ANO