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ELECTRICAL
Current Drain with 7.5 V DC:
No Sound Output 35 mA ± 20%
Maximum Volume 103 mA ± 20%
with keys A2, B2, C3 and D3 pressed
in Synth-Lead tone, Volume: Maximum
Speaker Output Level at 10 cm away from the speaker 690 mV ± 20%
with key C3 pressed in Synth-Lead tone
Volume: Maximum
Minimum Operating Voltage: 4.8 V
SPECIFICATIONS
GENERAL
(Internal Mode)
Number of Keys: 32
Polyphonic: 4-note
Preset Tones: 10; Piano, E. Piano, Vibraphone, Organ, E. Guitar, E. Bass, Strings,
Brass, Flute, Synth-Lead
Controls: Volume control; 5 levels, Pitch bend switch, Modulation switch
Built-In Speaker: 6.5 cm dia. 0.5 W input rating: 1 pec.
Tuning: A4=442 Hz (fixed)
Terminals: MIDI Output, AC Adapter Jack (DV 7.5 V)
Power Source: DC: 4 AA size dry batteries
Battery life: Approx. 6 hours (SUM-3/R6P)
AC: AC Adapter AD-1
Power Consumption: 0.7 W when operating by batteries
1.0 W when operating by an AC adapter
Dimensions (HWD): 50 x 399 x 132 mm
(1-15/16 x 15-11/16 x 5-3/16 inches)
Weight: 0.64 kg (1.4 lbs) including batteries
CONTENTS
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Schematic Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13