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CONTENTS
ELECTRICAL
Current Drain with 12 V DC:
No Sound Output 145 mA ± 20%
Maximum Volume 1470 mA ± 20%
with keys C2 to B3 (24 polyphonic) pressed in Strings tone
Volume: maximum, Touch response: maximum
Headphone Output Level (Vrms with 8 Ω load each channel):
with key F3 pressed in Strings tone Left channel 100 mV ± 20%
Speaker Output Level (Vrms with 8 Ω load each channel):
with key F2 pressed in Strings tone Left channel 2800 mV ± 20%
Minimum Operating Voltage: 5.8 V
SPECIFICATIONS
GENERAL
Number of keys: 76
Polyphonic: 24-note
Preset tones: 5, Piano-1, Piano-2, Electric Piano, Pipe Organ, Strings
Layer
Touch response: On/Off
Key transpose: Range of ± 1 octave by a semitone increment
Demo tunes: 5, 1. Petit Chien
2. Cozy's Castle
3. Red Leaves
4. Toccata & Chorus
5. Rainbow
Tuning control: 440Hz ± 50 cents
Built-In speakers: 12 cm dia. 5 W input rating: 2 pcs.
MIDI: 8-channel, multi-timbral reception
Terminals: Phone Jack [Output impedance: 47 Ω, Output voltage: 2.6 V(rms) MAX],
MIDI Jacks (IN, OUT), Sustain Jack, AC Adaptor Jack (12 V)
Auto power off: Approximately 6 minutes after the last operation
Power source: 2-way AC or DC source
AC: AC adaptor AD-12
DC: 6 D size dry batteries
Battery life: approx. 4 hours by manganese batteries R20P/SUM-1
Power consumption: 18 W
Dimensions (HWD): 96 x 1161 x 303 mm (3-3/4 x 45-11/16 x 11-15/16 inches)
Weight: 6.3 kg (13.9 lbs) excluding batteries
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Major Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
PCB View and Check Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Schematic Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Exploded View. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
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