Casio CTK-555L- 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) Drum pads: 6 Tones: 200 (128 General MIDI, 32 synthesized, 8 drum, 32 user); with layer andsplit Rhythm instrument tones: 61 Polyphony: 24 notes maximum (12 for certain tones) Digital effects: 3 reve...

Page 5 - BLOCK DIAGRAM

— 3 — BLOCK DIAGRAM KC0 ~ KC7 FI0 ~ FI9SI0 ~ SI9 KI0 ~ KI2PB0 ~ PB3 P10, P13P14, P17 Working Storage RAM (256K-bit) LSI4 TC55257DFL-70L(EL) MIDI EA0 ~ EA14 EIO0 ~ EIO7 Sound Source ROM (24M-bit) LSI3 LH536PY8 WCKOSOBCK D/A Converter IC1 UPD6379GR Filter Q308 ~ Q311 MainVolume Power Amplifier IC301 T...

Page 6 - CIRCUIT DESCRIPTION; KEY MATRIX

— 4 — KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7 FI10 Chord 3 Chord 1 ▼ 9 6 + Tone KI0 Chord 4 Chord 2 Start/ 8 3 — Rhythm Stop KI1 Chord 5 Intro Tempo 7 2 0 Normal/ ▼ Fill-In KI2 Chord 6 Synchro/ Tempo 4 5 1 Variation/ Ending ▲ Fill-In KC0 KC1 KC2 KC3 KC4 KC KC6 KC7 FI0 C2 (1) C#2 (1) D2 (1) D#2 (1) E2 (1) F2...

Page 11 - FILTER BLOCK

— 9 — 680‰ 50V22 C341 Q309 R340 1.5K AVDD AG AG AG 50V22 Q308 C340 C123H C346 R342 R343 R344 3.3K 4.7K 1K 6.3V220 2SC1740STPR 2SC1740STPR R341 C345 C821BA C339 1.5K R335 C123H C343 Q310 Q311 3.3K 4.7K 1K R337 R338 C349 50V22 C350 50V22 R336 AG AG AG AVDD 2SC1740STPR 2SC1740STPR 1K 22K 22K 10K 3.9K 1...

Page 13 - ADJUSTMENT; DISPLAY PCB

— 11 — ADJUSTMENT DISPLAY PCB 1) Items to be adjusted: 2) Adjustment and Test Point Locations (TOP VIEW) Item Measuring Instrument Vop voltage setting Voltmeter (BOTTOM VIEW) VR501 TP2 TP1

Page 15 - MAJOR WAVEFORMS

— 13 — MAJOR WAVEFORMS 1 NMI signalJD connector pin 1 2 APO signalJH connector pin 6 5 Key scan signal KC0JA connector pin 9 6 Key scan signal KC1JA connector pin 10 3 Button scan signal PA0JD connector pin 9 4 Button scan signal PA1JD connector pin 8 9 DAC output (L-ch)JH connector pin 9 0 DAC outp...

Page 16 - PRINTED CIRCUIT BOARDS

— 14 — PRINTED CIRCUIT BOARDS Main PCB JCM454-MA1M Top View Bottom View 2 10 9 3 8 1 4 7 5 6

Page 19 - SCHEMATIC DIAGRAMS

— 17 — SCHEMATIC DIAGRAMS Main PCB JCM454-MA1M 2 10 6 6 3 4 1 5 6 9

Page 26 - EXPLODED VIEW

— 24 — EXPLODED VIEW 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 14 18 17 19 20 21 22 23 24 25 26 27 28 29 R-1 R-2 R-3

Page 27 - This parts list does not include the cosmetic parts, which; PARTS LIST

— 25 — 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 30 - 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