Page 2 - CONTENTS
CONTENTS SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 DISASSEMBLE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3...
Page 3 - SPECIFICATIONS
— 1 — General Number of Keys: 61 Polyphonic: 16-note Preset Tones: 64 Auto-Rhythms: 64 Auto-Accompaniment: CASIO Chord/Fingered Auto-Play Tunes: Songs: 32 (Melody ON/OFF)Free Sessions: 32 Terminals: PHONE/OUTPUT Jack [Output Impedance: 40 Ω , Output Voltage: 3.5V(rms)MAX], AC Adaptor Jack (DC9V) Bui...
Page 4 - DISASSEMBLE INSTRUCTIONS
— 2 — DISASSEMBLE INSTRUCTIONS Note: The keyboard PCBs are fixed to the case by springy clicks instead of by screws. To disassemble keyboard PCBs 1. Using gentle force, press a click to release the PCB from the click. A click can be caught in the slit behind of it, or can be deformed if too much for...
Page 5 - BLOCK DIAGRAM
— 3 — KO0~KO14 KI0~KI7 Keyboard Switches Oscillator Power Supply Circuit AVDD +5V VCC +9V Speaker Output Jack Filter T4/T5 CPU MSM6567-15 T1/T2/T3 Amplifier LA4598 Main Volume Mute Circuit Reset IC VDD +5V M5218APR T6 S-8053ANO LEDX6 (APO) BLOCK DIAGRAM
Page 10 - HOW TO GET POWER IN OPENING TOP PANEL
— 8 — Power Supply Circuit The power supply circuit generates three voltages - VDD (+6.0V) for the CPU and the reset IC, AVDD(+6.0V) for the analog circuit, and VCC1 (+8.6V) for the pilot lamp and the power amplifier.When turning power on, the 100 µ capacitor makes transistor T2 on first then the CP...
Page 11 - SCHEMATIC DIAGRAMS
Page 12 - PCB VIEW AND MAJOR WAVEFORMS
— 10 — PCB VIEW AND MAJOR WAVEFORMS 8 7 9 6 5 10 11 2 1 3 4
Page 14 - EXPLODED VIEW
Page 15 - IC AND TRANSISTOR LEAD IDENTIFICATIONS
— 9 — IC AND TRANSISTOR LEAD IDENTIFICATIONS LA4598 M5218APR S-8053ANO 2SA854SR2SC1740SQ2SD1468SR 2SC3112B 2SD2008Q,R E C B E B C Power GND ch1 B.S. ch1 OUT VCC ch1 N.F. ch1 IN D.C. Pre GND Standby ch2 IN ch2 N.F. ch2 OUT ch2 B.S. 1 2 3 4 5 6 7 8 9 10 11 12 13 E C B + - + - 1 2 3 4 5 6 7 8 VCC GND —...
Page 16 - PARTS LIST; Prices and specifications are subject to change with-
PARTS LIST CTK-450 Notes: 1. Prices and specifications are subject to change with- out prior notice. 2. As for spare parts order and supply, refer to the "GUIDEBOOK for Spare parts Supply", publishedseparately. 3. The numbers in item column correspond to the same numbers in drawing.