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Electronic Keyboard
Casio
CTK-530
LED DRIVING
1
8
18
18
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18 pages, 1.15 Mb
— 8 —
LED Latch
IC107
HD74HC373AP
LG
CPU
LSI101
UPD912GF-3BA
LVDD
LED Latch
IC105
HD74HC75AP
PLE
IC106
BA612
LED Driver
LO0 ~LO3
Q111 ~Q118
LED Driver
MD0 ~ MD7
La ~ Lg, Lp
MD8 ~ MD11
LED DRIVING
Contents
Main
CONTENTS
SPECIFICATIONS
GENERAL
ELECTRICAL
3
BLOCK DIAGRAM
CIRCUIT DESCRIPTION
KEY MATRIX
Note: Each key has two contacts, the first conatct (1) and second contact (2).
NOMENCLATURE OF KEYS
RESET CIRCUIT
CPU (LSI101: UPD912GF-3BA)
DAC (IC103: UPD6379GR)
Filter Block From DAC To power amplifier
POWER SUPPLY CIRCUIT
FILTER BLOCK
POWER AMPLIFIER (IC102: LA4598)
LED DRIVING
1 2 3
4 5 6
7 8 9
C D
MAJOR WAVEFORMS
Page
SCHEMATIC DIAGRAMS
JCM460-MA1M
Page
EXPLODED VIEW
Page
Page
Description of Capacitors
Description of Resistors