Schematic Diagram - Elenco Electronics AK-900 Assembly And Instruction Manual

SCHEMATIC DIAGRAM

OSC1
OSC2
KEY1
KEY2
KEY36
KEY37
R0
R1
R2
R3
R4
IC 9037 BLOCK DIAGRAM
VIBRATO
Oscillator Timing Divider
Generator
Direct
Keyboard
Logic
Generator
Rhythm
Generator
Matrix
Percussion
Control Key
Generator
Logic
CO C2 C4 TEMLED
C1 C3
VDD
Tone1 Envelope Circuit
Envelope Circuit
Tone2
Tempo
Melody Control
Circuit
VSS
-17-
OUT1
Driver
ENV1
ENV2
OUT2
Driver
BD
SD
D/A Output
HH
CB
& PLA
DEMO