Casio CTK-680, Service Manual

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Other functions
Transpose: 25 levels (1 octave lower C to 1 octave upper C)
Tuning: Adjustable: A4 = 440 Hz
±
50 cents
Pitch Bender: Adjustable range:
±
12 semitones (bend up, bend down, bend saw) using
musical pads
Modulation: Vibrato setting and performances are done by a Musical pad.
MIDI: 16-timbre multi-timbre receive (General MIDI Level 1)
Speakers: 12 cm diameter
×
2 (output: 2.5 W + 2.5 W)
Input/Output Jacks
Power supply: 9 V DC
Headphones: Stereo mini jack
Output jacks: Output impedance: 120
Ω
Output voltage 4.2 V (RMS) MAX
Assignable Jack: Standard jack (sustain, sostenuto, soft, rhythm start/stop)
MIDI terminals: IN, OUT
Power supply: 2-way
Batteries: Six D-size batteries
Battery life: Approximately 5 hours on R20P (SUM-1) manganese batteries
AC adaptor: AD-5 (optional)
Auto power off: Approximately six minutes after last key operation under battery power
(disabled when AC adaptor is connected).
Power consumption: 9 V --- 7.7 W
Dimensions: 94.2
×
36.7
×
13.5 cm (31-7/16
×
14-1/2
×
4-3/8 inches)
Weight: 5.2 kg (11.7 lbs) excluding batteries
ELECTRICAL
Current drain with 9 V DC:
No sound output
320 mA
±
20%
Maximum volume
with 12 polyphonic notes in tone No. 022 960 mA
±
20%
Volume; maximum
Phone output level (Vrms with 8
Ω
load each channel): Left channel 115 mV
±
20%
with key C6 pressed in tone No. 042
Line output level (Vrms with 47 k
Ω
load each channel): Left channel 1280 mV
±
20%
with key C5 pressed in tone No. 042
Minimum operating voltage: 5.75 V