Casio CTK-431- Manuals

Page 2 - CONTENTS

CONTENTS Specifications ................................................................................................................................... 1 Block Diagram ...................................................................................................................................

Page 3 - SPECIFICATIONS; GENERAL

— 1 — SPECIFICATIONS GENERAL Keyboard: 49 standard-size keys, 4 octaves Tones: 100 Polyphony: 12 notes maximum (6 for certain tones) Auto accompaniment Rhythm patterns: 100 Tempo: Variable (236 steps, = 20 to 255) Chords: 2 fingering methods (CASIO CHORD, FINGERED) Rhythm controller: START/STOP, SYN...

Page 4 - BLOCK DIAGRAM

— 2 — BLOCK DIAGRAM CPU MSM 6755C-17 LSI1 Keyboard Buttons LCD LCD Driver KS0066U-10B LSI3 Reset IC IC1 Oscillator X1, Q1 Power Supply Circuit Q101 ~ Q103, D104 Power Amp. LA4598 IC101 Filter Q105 Speaker (L) Speaker (R) Phones/Output VC AVDD VCC DVDD APO MD0 ~ MD7 MA0 ~ MA17 DC + 9 V IN DB4 ~ DB7 C...

Page 5 - CIRCUIT DESCRIPTION; KEY MATRIX

— 3 — KI0 KI1 KI2 KI3 KI4 KI5 KI6 KO0 C2 G#2 E3 C4 G#4 E5 C6 KO1 C#2 A2 F3 C#4 A4 F5 KO2 D2 A#2 F#3 D4 A#4 F#5 KO3 D#2 B2 G3 D#4 B4 G5 KO4 E2 C3 G#3 E4 C5 G#5 KO5 F2 C#3 A3 F4 C#5 A5 KO6 F#2 D3 A#3 F#4 D5 A#5 KO7 G2 D#3 B3 G4 D#5 B5 KO8 — + 0 Tempo Tempo Volume Volume Down Up Down Up KO9 3 2 1 Start...

Page 8 - FILTER BLOCK

— 6 — FILTER BLOCK Since the sound signals from the CPU is stepped waveforms, the filter block is added to smooth the waveforms. POWER AMPLIFIER (IC101: LA4598) The power amplifier is a two-channel amplifier with standby switch.The following table shows the pin function of IC101. Pin No. Terminal In...

Page 9 - ADJUSTMENT; MAIN PCB

— 7 — Item Measuring Instrument Vop voltage setting Voltmeter 3) Equipment connection/Procedure Vop voltage setting InputConnection InputPoint InputSignal Adjust OutputConnection OutputPoint Adjust for VR1 Voltmeter TP1 Adjust for 4.1 ~ 4.0 V readingo n v o l t m e t e r u n d e r t h etemparature 2...

Page 10 - MAJOR WAVEFORMS

— 8 — MAJOR WAVEFORMS 1 Clock pulseMSM6755C-17 pin 32 1 2 +5 V source DVDDJB connector pin 4 3 APO signalJB connector pin 8 2 3 4 Button scan signal KO6JA connector pin 14 5 Button scan signal KO7JA connector pin 15 4 5 6 LCD common signal COM9KS0066U-10B pin 55 7 LCD common signal COM10KS0066U-10B ...

Page 11 - PRINTED CIRCUIT BOARDS

— 9 — 3 2 7 6 4 5 1 Top View PRINTED CIRCUIT BOARDS Main PCB JCM444-MA1M Bottom View

Page 12 - SCHEMATIC DIAGRAMS

— 10 — SCHEMATIC DIAGRAMS Main PCB JCM444-MA1M 1 5 4 2 3 7 6

Page 16 - EXPLODED VIEW

— 14 — EXPLODED VIEW 18 17 19 22 6 R-1 5 12 7 10 9 11 13 14 15 16 8 1 2 23 4 21 20 4 R-3 R-5 3 R-4 R-2

Page 17 - This parts list does not include the cosmetic parts, which; PARTS LIST

— 15 — Notes: This parts list does not include the cosmetic parts, which p a r t s a r e m a r k e d w i t h i t e m N o . " R - X " i n t h e e x p l o d e dview.C o n t a c t o u r s p a r e p a r t s d e p a r t m e n t i f y o u n e e d t h e s eparts for refurbish. 1. Prices and specifi...

Page 19 - Overseas Service Division

CASIO TECHNO CO.,LTD. Overseas Service Division Nishi-Shinjuku Kimuraya Bldg. 1F5-25, Nishi-Shinjuku 7-ChomeShinjuku-ku, Tokyo 160-0023, Japan