Casio CTK-401 - Manuals - manualsarea.com

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 6755B-17 LSI1 Keyboard Buttons LCD LCD Driver SED1278F0A LSI3 Reset IC IC1 Oscillator X1, Q1 Power Supply Circuit Q101 ~ Q103, D104 Power Amp. TA8248K IC101 Filter (L) Q104 Filter (R) Q105 Output VC VCC DVDD APO MD0 ~ MD7 MA0 ~ MA17 DC + 9 V IN DB4 ~ DB7 COM1 ~ COM16 SEG1...

Page 5 - CIRCUIT DESCRIPTION; KEY MATRIX

— 3 — CIRCUIT DESCRIPTION KEY MATRIX NOMENCLATURE OF KEYS 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...

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: TA8248K) The power amplifier is a two-channel amplifier with standby switch.The following table shows the pin function of IC101. Pin No. Terminal I...

Page 9 - ADJUSTMENT; MAIN PCB

— 7 — 3) Equipment connection/Procedure Vop voltage setting InputConnection InputPoint InputSignal Adjust OutputConnection OutputPoint Adjust for VR1 Voltmeter V5 Adjust for 4.3 ± 0.1 V reading on voltmeter.Make fine adjustment accord-ing to the next instruction. 53.5 ° LCD Eye Watching the LCD at a...

Page 10 - MAJOR WAVEFORMS

— 8 — MAJOR WAVEFORMS 1 Clock pulseMSM6755B-17 pin 32 1 2 +5 V source DVDDJC connector pin 6 3 APO signalJC connector pin 5 2 3 4 Sound waveform (R-ch) Tone: Whistle JC connector pin 4 Key: A4 5 Sound waveform (L-ch) Volume:JC connector pin 3 4 5 6 Button scan signal KO6JA connector pin 14 7 Button ...

Page 11 - PRINTED CIRCUIT BOARDS; Top View

— 9 — PRINTED CIRCUIT BOARDS Main PCB JCM442-MA1M Top View Bottom View 1 2 3 4 5 8 9 6 7

Page 12 - SCHEMATIC DIAGRAMS

— 11 — SCHEMATIC DIAGRAMS Main PCB JCM442-MA1M 6 7 1 9 8 5 4 3 2

Page 16 - EXPLODED VIEW

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

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

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 specifications...