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Extracted text from casio ctk 330 service manual (Ocr-read)
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CONTENTS
Specifications .......................................................................................................................... 2
Block Diagram ......................................................................................................................... 3
Circuit Description ................................................................................................................... 4
Major Waveforms .................................................................................................................... 7
Schematic Diagrams ............................................................................................................... 8
Printed Circuit Board ............................................................................................................. 10
Exploded View ...................................................................................................................... 11
Parts List ............................................................................................................................... 13
SPECIFICATIONS
GENERAL
Number of keys: 49
Polyphonic: 12-note
Preset tones: 100
Auto-rhythms: 50, Tempo control: 40 to 255
Accompaniment: Casio Chord, Fingered
Song bank: 20-tune
Tuning control: 440 Hz ± 50 cents
Built-in speakers: 4 inch dia. 2 W input rating: 2 pcs
Terminals: Stereo standard Jack (Output impedance: 100 ohm, Output voltage: 3 V (rms)
MAX
Power source: 2-way AC or DC source
AC: AC adapter
DC: 6 AA size dry batteries
Power consumption: 7.2 W
Dimensions(HWD): 988 ´ 311 ´ 125 mm (38-15/16 ´ 12-1/4 ´ 4-15/16 inches)
Weight: 3.5 kg (7.7 lbs) excluding batteries
ELECTRICAL
Current drain with 9 V DC:
No sound output 120 mA ± 30%
Maximum volume 650 mA ± 30%
with white keys C1 to G2 pressed in Synth-Lead 1
Volume: 9
Phone output Level (Vrms with 8 ohm load each channel):
with key E3 pressed in Synth-Lead 1 80 mV ± 30%
Sound Pressure (at 10 cm away from speaker):
with key E3 pressed in Synth-Lead 1 100 dB ± 10 dB
Minimum operating voltage: 6.0 V
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CPU
MSM 6755B-08
LSI101Keyboard Buttons
LED
Reset IC
IC102Oscillator
X101, Q107 Q111 Power Supply Circuit
Q101 ~ Q104, D106
Power Amp.
LA4598
IC101Filter (L)
Q105
Filter (R)
Q106 Output
DC+9V IN
VC
AVDD DVDD LVDD
APOCC1 ~ CC3La ~ Lg,
Lp
KO8 ~
KO11KI0 ~ KI7
KO0 ~ KO7
BLOCK DIAGRAM
