Casio ctk 620l service manual
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Ñ 1 Ñ SPECIFICATIONS GENERAL Keyboard: 61 standard-size keys, 5 octaves (with touch response on/off) Key light system: Can be turned on and off (up to 10 keys can be lit at the same time) Tones: 137 (128 General MIDI tones + 9 drum tones); with layer and split Rhythm instrument tones: 61 Polyphony: 24 notes maximum (12 for certain tones) Digital effects: 3 reverb types (HALL, STAGE, ROOM) Auto accompaniment Rhythm patterns: 100 Tempo: Variable (216 steps, = 40 to 255) Chords: 3 fingering methods (CASIO CHORD, FINGERED, FULL RANGE CHORD) Rhythm controller: START/STOP, INTRO, NORMAL/NORMARL FILL-IN, VARIATION/ VARIATION FILL-IN, SYNCHRO/ENDING Accomp volume: 0 to 127 (128 steps) 3-step lesson: 3 lessons (step 1, 2, 3) Playback: Repeat play of a single tune Song bank Number of tunes: 100 Controllers: PLAY/PAUSE, STOP, FF, REW, LEFT, RIGHT Musical information function: Tone, Auto Accompaniment, Song Bank numbers and names; staff nota- tion, tempo, metronome, measure and beat number, step lesson display, chord name, dynamic mark, fingering, pedal operation Metronome: On/Off Beat specification: 1 to 6 Memory Songs: 2 Recording tracks: 2 Recording methods: Real-time, step Memory capacity: Approximately 5,200 notes (total for two songs) MIDI: 16 multi-timbre receive, GM Level 1 standard Other functions Transpose: 25 steps (Ð12 semitones to +12 semitones) Tuning: 101 steps (A4 = approximately 440 Hz ± 50 cents) Terminals MIDI terminals: IN, OUT Assignable jack: Standard jack (sustain, sostenuto, soft, rhythm start/stop) Headphone/output terminal: Stereo standard jack Output Impedance: 100 W Output voltage: 4.5 V (RMS) MAX CONTENTS Page Specifications ............................................................................................................................................ 1 Block Diagram ........................................................................................................................................... 3 Circuit Description ..................................................................................................................................... 4 Adjustment .............................................................................................................................................. 12 Major Waveforms .................................................................................................................................... 13 Printed Circuit Boards ............................................................................................................................. 14 Schematic Diagrams ............................................................................................................................... 15 Exploded View ........................................................................................................................................ 28 Parts List ................................................................................................................................................. 29
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Ñ 2 Ñ ELECTRICAL Current drain with 9 V DC: No sound output 200 mA ± 20 % Maximum volume 1090 mA ± 20 % with 10 keys from F1 to A2 pressed in French Horn Volume: maximum, Touch response: maximum Reverb: stage Speaker output level (Vrms with 4 W load each channel): with key C1 for R-ch, F1 for L-ch in French Horn Volume: maximun, Touch response: maximum 2300 mV ± 20 % Reverb: stage Phone output level (Vrms with 8 W load each channel): with key C1 for R-ch, F1 for L-ch in French Horn Volume: maximun, Touch response: maximum 180 mV ± 20 % Reverb: stage Output level (Vrms with 47 W load each channel): with key C1 for R-ch, F1 for L-ch in French Horn Volume: maximun, Touch response: maximum 2600 mV ± 20 % Reverb: stage Minimum operating voltage: 6.3 V About General MIDI General MIDI standardizes MIDI data for all sound source types, regardless of manufacturer. General MIDI specifies such factors as tone numbering, drum sounds, and available MIDI channels for all sound sources. This standard makes it possible for all MIDI equipment to reproduce the same nuances when playing General MIDI data, regardless of the manufacturer of the sound source. This keyboard supports General MIDI, so it can be used to play commercially available pre-recorded General MIDI data and General MIDI data send to it from a personal computer. Power jack 9 V DC Power supply: 2-way Batteries: Six D-size batteries Battery life: Approximately 5 hours continuous operation on manganese batteries AC adaptor: AD-5 Auto power off: Turns power off approximately six minutes after last key operation. En- abled under battery power only, can be disabled manually. Speaker output: 2.5 W + 2.5 W Power consumption: 9 V --- 7.7 W Dimensions (HWD): 96.1 ´ 39.1 ´ 14.4 cm (37 7/8 ´ 15 3/8 ´ 5 11/16 inches) Weight: Approximately 6.0 kg (13.25 lbs) (without batteries)