Casio CTK-680 Service Manual page 3

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