Casio CTK-220L User Manual
CTK-220L
100 TONES
POWER/MODE
ON
OFF
FINGERED
CASIO CHORD
NORMAL
VOLUME SYNCHRO/
¢
¢
START/
TEMPO
051627384
¢
FILL-IN
STOP
¢
TRANSPOSE/TUNE
TONE
RHYTHM
9
SONG
STEP 1 STEP 2 STEP 3
BANK
PART
SELECT
ELECTRONIC KEYBOARD
25 RHYTHMS
DEMO
MULTI FUNCTION DISPLAY
RHYTHMTONE SONG BANK
20 SONG BANK
20 SONG BANK KEYBOARD
CTK-220L
CONTENTS
Page
Specifications ................................................................................................................................... 1
Block Diagram .................................................................................................................................. 2
Circuit Description ............................................................................................................................ 3
Major Waveforms ............................................................................................................................. 6
Printed Circuit Boards ...................................................................................................................... 7
Schematic Diagrams ........................................................................................................................ 8
Exploded View................................................................................................................................ 14
Parts List ........................................................................................................................................ 15
SPECIFICATIONS
GENERAL
Number of keys: 49
Polyphonic: 12-note
Preset tones: 100
Transpose: F# ~ C ~ F: half-note
Auto-rhythms: 25, Tempo: Adjustable, 216 steps (40 ~ 255), initial value: 120
Accompaniment: CASIO Chord, Fingered, Fill-in pattern, Synchro start
Song bank: 20-tune
Digital volume control: 10 steps (0 ~ 9), initial value: 7
Tuning control: 440 Hz ± 50 cents
Built-in speakers: 10 cm dia. × 1 (Output: 2 W)
Terminals: Headphone Jack, Stereo mini Jack [Output impedance: 70 q, Output voltage:
3.6 V (rms) MAX]
Auto power off: Approximately 6 minutes after the last operation
Power source: 2-way AC or DC source
AC: Required optional AD-5 AC adaptor
DC: 6 AA size batteries
Power consumption: 7.7 W
Dimensions (HWD): 85 × 771 × 324 mm (3-3/8 × 30-3/8 × 12-3/4 inches)
Weight: 3.4 kg (7.5 lbs) excluding batteries
ELECTRICAL
Current drain with 9 V DC:
No sound output 160 mA ± 20 %
Maximum volume 840 mA ± 20 %
with white keys C1 to G2 pressed in Synth-Lead 1
Volume: Maximum
Phone output level (Vrms with 8 ohm load):
with key C2 pressed in Synth-Lead 1 98 mV ± 20 %
Speaker output level (Vrms with 4 ohm load):
with key F4 pressed in Synth-Lead 1 2000 mV ± 20 %
Minimum operating voltage: 6.3 V
— 1 —
BLOCK DIAGRAM
7 seg. LED
LED Latch IC2, IC3
— 2 —
DC+9 V IN
Phone/Output
Power Supply Circuit
Q301 ~ Q304
D334, D336
Amp.
IC301
LA4598
Filter
Q305
APO
CPU
LSI1
MSM 6755B-13
PG
Reset IC
X1, Q11
MD0 ~ MD7
IC1
KO8 ~ KO11
KI0 ~ KI7
KO0 ~ KO7
LX0 ~
LED Driver
LX7
Q5 ~ Q8
LY1 ~
LED Driver
LY7
Q1 ~ Q4
Buttons
Illuminant
Keyboard
CIRCUIT DESCRIPTION
KEY MATRIX
KI0 KI1 KI2 KI3 KI4 KI5 KI6 KI7
KO0 C2 G#2 E3 C4 G#4 E5 C6
KO1 C#2 A2 F3 C#4 A4 F5
KO2 D2 A#2 F#3 D4 A#4 F#5
KO3 D#2 B2 G3 D#4 B4 G5
KO4 E2 C3 G#3 E4 C5 G#5
KO5 F2 C#3 A3 F4 C#5 A5
KO6 F#2 D3 A#3 F#4 D5 A#5
KO7 G2 D#3 B3 G4 D#5 B5
KO8 01234
KO9 56789Down
K10 Tone Rhythm
Song
Bank
Part
Select
One Key One Key Demo
K11 Step-1 Step-2 Step-3 Fingered
Start/
Stop
Casio
Chord
Up
Volume
Down
Normal Off
LED MATRIX
LX0 LX1 LX2 LX3 LX4 LX5 LX6 LX7
LY1 D4 D3 C3 C2 G#2 F#2 D#2 C#2
LY2 C4 E3 B2 D2 A#2 C#3 D#3 F#3
LY3 B3 F3 A2 E2 D#4 C#4 A#3 G#3
LY4 A3 G3 G2 F2 C#5 A#4 G#4 F#4
LY5 E4 C5 D5 B5 D#5 F#5 G#5 A#5
LY6 F4 B4 E5 A5 C6
LY7 G4 A4 F5 G5
Volume
Down
Synchro/
Fill-In
NOMENCLATURE OF KEYS
C#2 D#2 F#2 G#2 A#2 C#3 D#3 F#3 G#3 A#3 C#4 D#4 F#4 G#4 A#4 C#5 D#5 F#5 G#5 A#5
C2
D2 E2 F2 G2 A2 B2 C3 D3 E3 F3 G3 A3 B3 C4 D4 E4 F4 G4 A4 B4 C5 D5 E5 F5 G5 A5 B5 C6
— 3 —
CPU (LSI1: MSM6755B-13)
The CPU contains a sound data ROM and a DAC (Digital to Analog Convertor), and it provides a sound
waveform in accordance with the pressed key and the selected tone. The CPU also controls key input, button
input and LED driving. The following table shows the pin functions of LSI1.
Pin No. Terminal In/Out Function
1 MA14 — Not used.
2 MWEB Out Clock for LED latches
3 ~ 5 — — Not used.
6 MA0 Out 7-seg. LED drive signal
7 ~ 19 MA1 ~ MA11 — Not used.
20 ~ 27 MD0 ~ MD7 Out 7-seg. LED drive signal
28, 29 NC1, NC2 — Not used.
30 DGND In Ground (0 V) source
31 DVCC In +5 V source
32, 33 XTLO, XTLI In/Out 20 MHz clock input/output
34 NC3 — Not used.
35 RSTB In Reset signal input
36 P24/RXD — Not used. Connected to +5 V.
37 P25/TXD — Not used.
38 NMI In Power ON signal input. Connected to +5 V.
39 APO Out APO (Auto Power Off) signal output
40 NC4 — Not used.
41 REFH Out Terminal for the internal DAC
42, 43 NC5, NC6 — Not used.
44 DAOR Out Right channel sound waveform output
45 NC7 — Not used.
46 AVdac In +5 V source for the internal DAC and ADC
47 DAOL Out Left channel sound waveform output
48 REFL Out Terminal for the internal DAC and ADC
49 AGdac In Ground source for the internal DAC
50 AGadc In Ground source for the internal ADC
51 ANI — Not used. Connected to ground.
52 AVadc In +5 V source for the internal ADC
53 NC8 — Not used.
54 MOD0 In Mode selection terminal. Connected to +5 V.
55, 56 MOD1, MOD2 In Mode selection terminal. Connected to ground.
57 P40 In APO cancellation signal
58 ~ 65 KI0/P30 ~ KI7/P37 In Terminals for key/button input signal
66 ~ 73 KO0/P50 ~ KO7/P57 Out Terminals for key scan signal
74 ~ 77 KO8/P20 ~ KO11/P23 Out Terminals for button input signal
78 NC9 — Not used.
79 LVCC In +5 V source
80 ~ 95 LX0 ~ LX7, LY0 ~ LY7 Out LED drive signal
96 LGND In Ground source
97 ~ 100 MA18 ~ MA15 — Not used.
— 4 —
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