Casio CTK-631, Service Manual

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ELECTRICAL
Current drain with 9 V DC:
No sound output
412 mA
±
20 %
Maximum volume 1165 mA
±
20 %
with 12 keys from C3 to B3 pressed in Square wave tone
Volume: maximum, Touch response: maximum
Reverb: Hall
Phone output level (Vrms with 32
Ω
load each channel): L-ch 615 mV
±
20 %
with key A5 pressed in Bassoon tone R-ch 555 mV
±
20 %
Volume: maximum, Touch response: maximum
Reverb: Hall
Speaker output level (Vrms with 4
Ω
load each channel): L-ch 2780 mV
±
20 %
with key A5 pressed in Bassoon tone R-ch 2570 mV
±
20 %
Volume: maximum, Touch response: maximum
Reverb: Hall
Output level (Vrms with 47k
Ω
load each channel): L-ch 3070 mV
±
20 %
with key A5 pressed in Bassoon tone R-ch 2750 mV
±
20 %
Volume: maximum, Touch response: maximum
Reverb: Hall
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.