Casio WK-1800 Service Manual

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Other functions
Pitch bend range: Adjustable (12 semitones upwards and downwards)
Modulation: Equipped
Transpose: 25 steps (–12 semitones to +12 semitones)
Tuning: Adjustable (A4 = approximately 440Hz ± 50 cents)
Terminals
MIDI terminal: IN, OUT
Sustain/Assignable jack: Standard jack (sustain, sostenuto, soft, rhythm start/stop)
Line out L(MONO)/R
Output Impedance: 3 kΩ
Output Voltage: 1.5 V (RMS) MAX
Headphones Stereo standard jack
Output Impedance: 200 Ω
Output Voltage: 220 mV (RMS) MAX
12 V DC
Floppy disk drive
Type: 3.5" FDD
Formats: 2DD (720KB MS-DOS format)
2HD (1.44MB MS-DOS format)
Functions: Save and load of user tones, user rhythms, sequencer, and registration
data; playback of SMF; disk formatting; file delete; accompaniment pat-
tern style conversion
Power supply: Dual power supply system
Batteries Six D-size batteries
Battery life Approximately 2 hours continuous operation on alkaline batteries
AC adapter: AD-12
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: 5 W + 5 W
Power consumption: 12 V 18 W
Dimensions: 122.5 × 42.3 × 16.7 cm (48 1/4 × 16 11/16 × 6 9/16 inch)
Weight (without batteries): Approximately 9.8 kg (21.6 lbs)
Standard accessories: Music Stand; Pattern Conversion Disk
ELECTRICAL
Current drain with 12 V DC:
No sound output 480 mA ± 20 %
Maximum volume 1765 mA ± 20 %
with 24 keys from C3 to B4 pressed in Synth-Bass 4 tone
Volume: MAX., Velocity: MAX.
DSP0: Reverb1
Phone output level (Vrms with 32 Ω load each channel):
with tone Synth-Bass 4 tone L-ch (Key C3) 590 mV ± 20 %
Volume: MAX., Velocity: MAX. R-ch (Key F3) 590 mV ± 20 %
DSP0: Reverb1
Speaker output level (Vrms with 8 Ω load each channel):
with tone Synth-Bass 4 tone L-ch (Key C3) 7900 mV ± 20 %
Volume: MAX., Velocity: MAX. R-ch (Key F3) 7350 mV ± 20 %
DSP0: Reverb1
Output level (Vrms with 47 kΩ load each channel):
with tone Synth-Bass 4 tone L-ch (Key C3) 605 mV ± 20 %
Volume: MAX., Velocity: MAX. R-ch (Key F3) 510 mV ± 20 %
DSP0: Reverb1
Minimum operating voltage: 6.1 V

Casio WK-1800 Specifications

General

Number of Keys	76
MIDI	Yes
Display	LCD
Effects	Reverb, Chorus
Weight	8.5 kg
Polyphony	32
Speakers	Yes
Power Supply	AC adapter or batteries
Floppy Disk Drive	Yes
Connections	Headphones, MIDI In/Out, Sustain pedal
Sequencer	6 tracks