Casio CTK-541- Manuals

Page 2 - CONTENTS

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

Page 3 - SPECIFICATIONS; GENERAL

— 1 — SPECIFICATIONS GENERAL Keyboard: 61 standard-size keys, 5 octaves (with touch response on/off) Tones: 100 Polyphony: 16 notes maximum (8 for certain tones) Auto accompaniment Rhythm patterns: 100 Tempo: Variable (236 steps, = 20 to 255) Chords: 2 fingering methods (CASIO CHORD, FINGERED) Rhyth...

Page 4 - ELECTRICAL

— 2 — ELECTRICAL Current drain with 9 V DC: Nominal Limit No sound output 330 mA 330 mA ± 20% Maximum volume 990 mA 990 mA ± 20% with 16 keys C1 to D3 pressed in Synth-Lead 1Volume: Maximum, Touch response: ON(Velocity MAX) Phone output level (Vrms with 8 Ω load each channel): L 240mV 240 mV ± 20% w...

Page 5 - BLOCK DIAGRAM

— 3 — BLOCK DIAGRAM CPU GT913F(T) LSI1 Keyboard Buttons LCD LCD Driver KS0066U-10B LSI3 Reset IC UPD6379GR-E1 IC1 Oscillator X1, Q1 Power Supply Circuit Q201 ~ Q203, Q207, Q208, D205 Power Amp. TA8248K IC201 Filter (L) Q206 Filter (R) Q205 Phone/Output VC VCC DVDD AVDD APO DC + 9V IN DB4 ~ DB7 MIDI ...

Page 6 - CIRCUIT DESCRIPTION; KEY MATRIX

— 4 — CIRCUIT DESCRIPTION KEY MATRIX NOMENCLATURE OF KEYS KI0 KI1 KI2 KI3 KI4 KI5 KI6 KI7 KO0 C2 G#2 E3 C4 G#4 E5 C6 G#6 KO1 C#2 A2 F3 C#4 A4 F5 C#6 A6 KO2 D2 A#2 F#3 D4 A#4 F#5 D6 A#6 KO3 D#2 B2 G3 D#4 B4 G5 D#6 B6 KO4 E2 C3 G#3 E4 C5 G#5 E6 C7 KO5 F2 C#3 A3 F4 C#5 A5 F6 KO6 F#2 D3 A#3 F#4 D5 A#5 F...

Page 9 - FILTER BLOCK

— 7 — FILTER BLOCK Since the sound signals from the CPU is stepped waveforms, the filter block is added to smooth the waveforms. POWER AMPLIFIER (IC201: TA8248K) The power amplifier is a two-channel amplifier with standby switch.The following table shows the pin function of IC201. Pin No. Terminal I...

Page 10 - ADJUSTMENT; MAIN PCB

— 8 — ADJUSTMENT MAIN PCB 1) Items to be adjusted: 2) Adjustment and Test Point Locations Item Measuring Instrument Vop voltage setting Voltmeter VR1 (BOTTOM VIEW) Test point (TOP VIEW)

Page 12 - MAJOR WAVEFORMS

— 10 — MAJOR WAVEFORMS 1 Clock pulseGT913F(T) pin 15 1 2 Power source CVDDJD connector pin 13 3 APO signalJD connector pin 12 2 3 4 Sound waveform (R-ch) Tone: Whistle (59) JD connector pin 6 Key: A4 5 Sound waveform (L-ch) Volume: Max.JD connector pin 5 4 5 6 JB connector pin 1 7 JB connector pin 2...

Page 13 - PRINTED CIRCUIT BOARDS; Top View

— 11 — PRINTED CIRCUIT BOARDS Main PCB JCM456-MA1M Main PCB JCM456-MA1M Top View Bottom View 1 7 8 6 6 5 2 4 3

Page 17 - SCHEMATIC DIAGRAMS

— 15 — SCHEMATIC DIAGRAMS Main PCB JCM456-MA1M 1 6 7 2 3 4 5 9 8

Page 21 - EXPLODED VIEW

— 19 — EXPLODED VIEW 22 33 14 15 29 28 26 27 24 25 30 23 14 15 37 16 3 7 6 9 8 13 34 5 4 12 38 4 20 20 19 21 18 35 21 17 2 1 ´ 9 3 ´ 8 ´ 10 ´ 18 R-4 R-4 R-1 15 34 31 36 32 R-5 R-3 R-2 10 10 34 34 11 37

Page 22 - This parts list does not include the cosmetic parts, which; PARTS LIST

— 20 — 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 25 - 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