Page 1
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
Page 2
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
Page 3
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 —
Page 4
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
Page 5
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 —
Page 6
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 —
Page 7
FILTER BLOCK
Since the sound signal from the CPU is a stepped waveform, the filter block is added to smooth the waveform.
Amp.
IC301
Filter Block
Q305
POWER AMPLIFIER (IC301: LA4598)
The power amplifier is a two-channel amplifier with standby switch.
The following table shows the pin function of IC301.
Pin No. Terminal In/Out Function
1 Power GND In Ground (0V) source
2 Ch1 B.S. — Terminal for a bootstrap capacitor
3 Ch1 OUT Out Channel 1 output
4 VCC In +9V source
5 Ch1 N.F. In Negative feedback input
6 Ch1 IN In Channel 1 input
7 D.C. — Terminal for a decoupling capacitor
8 Pre GND In Ground (0V) source
9 Stand by In Power control signal input. 0 V: Off, +9 V: On
10 Ch2 IN In Channel 2 input
11 Ch2 N.F. In Negative feedback input
12 Ch2 OUT Out Channel 2 output
13 Ch2 B.S. — Terminal for a bootstrap capacitor
14 NC — Not used
CPU
LSI1
LED DRIVING
La ~ Lg
Q2 ~ Q4
7-segment LED Keyboard LEDs
LVDD
LED
Latch
IC3
(Segment)
LED
Latch
IC2
(Common)
MD0 ~ MD3
MWEB
MD4 ~ MD7
MA0
CPU
LSI1
MSM6755B-13
— 5 —
LX0 ~ LX7
Q5 ~ Q8
LY1 ~ LY7
Q1 ~ Q4
LG
Page 8
1
2
MAJOR WAVEFORMS
3
1 APO signal
MSM6755B-13 pin 39
2 Reset signal
RH5VL40AA pin 1
4
3 Clock
MSM6755B-13 pin 32
5
6
4 Sound signal
JH connector pin 2
Tone: Whistle (59)
Key : A4
5 LED drive signal LX0
MSM6755B-13 pin 88
6 LED drive signal LY1
MSM6755B-13 pin 81
Key: D4
— 6 —
Page 9
Sub PCB KDM445-MA2M
PRINTED CIRCUIT BOARDS
445B
UJW5
100
JA2
100
100
5
D304
D331
125
D333
R303
D332
R301
J301
L301
C328
GR
GR
PS
0
C301
0
LED301
L302
R333
R319
C336
5
JA1
L305
5
R331
C352
Q301
BE
125
R317
R316
100
150
J302
R
R
C356
C363
R353
R352
E
C364
R354
75
75
75
D301
12 JJ 1 10 JH 1
D330
D329
D328
D325
D327
R311
R342
Q305
D326
Q312
125
5
125
R366
BE
C307
C306
R309
R310
C361
B
C359
R327
D323
D324
75
C339
R348
R343
C337
D322
D321
R339
R338
C346
C349
D320
C347
5
D319
R365
5
D318
D317
5
D316
IC301
D315
C350
C344
5
5
C345
D314
D312
100
C341
D311
225
D313
R326
R325
C348
D310
5
C342
D308
125
5
D306
D307
C374
D305
D309
R373
250
5
Q310
C371
R388
5
C335
R370
E
R368
LVDD
C373
R374
C372
D308
175
R324
5
D336
B
C334
R371
R372
C332
R369
R323
AVDD
D302
DVDD
E
B
225
5
Q304
200
JA3
R322
C355
5
5
5
5
C331
JA5
JA4
Q303
C368
VCC
75
D334
C330
R321
E
B
R318
VC
D335
L304
150
C333
R335
R320
5
5
L303
75
Q302
EB
R302
Main PCB JCM446-MA1M
Top view
6
5
3
2
1
Bottom view Top view
4
— 7 —
Page 10
Main PCB JCM446-MA1M
SCHEMATIC DIAGRAMS
2
3
1
5
4
Note: KI signals are renamed. (e.g. KI0 on the keyboard PCB ⇒ KI1 on the main PCB)
NO USE FOR CTK-330
Connected to KDM4910K-KY2M
NO USE FOR CTK-330
Connected to KDM445-LD2M
NO USE FOR CTK-330
— 8 —
7
6
Page 11
Sub PCBs KDM445-MA2M/MA3M
— 9 —
Page 12
Keyboard PCBs KDM4910K-KY1M/KY2M
— 10 —
Page 13
LED PCB KDM446-LD1M
— 11 —
Page 14
LED PCB KDM445-LD2M
— 12 —
PCB NAME
Page 15
LED PCB KDM446-LD3M
PCB NAME
LED PCB KDM445-LD4M
PCB NAME
— 13 —
Page 16
EXPLODED VIEW
16
15
6
5
17
7
8
9
R-2
11
R-1
10
12
13
14
1
2
3
18
4
19
— 14 —
R-3
R-4
Page 17
PARTS LIST
CTK-220L
Notes: This parts list does not include the cosmetic parts, which
parts are marked with item No. "R-X" in the exploded
view.
Contact our spare parts department if you need these
parts for refurbish.
1. Prices and specifications are subject to change without prior notice.
2. As for spare parts order and supply, refer to the
"GUIDEBOOK for Spare parts Supply", published
seperately.
3. The numbers in item column correspond to the same
numbers in drawing.
Page 18
Item Code No. Parts Name Specification Q R
Main PCB
1 6925 6160 Main PCB ass'y (MA1M) M240438*3 1 B
LSI1 2012 4690 LSI, CPU MSM6755B-13 1 A
IC1 2105 5922 IC RH5VL40AA-T1 1 A
IC2 2105 4452 IC HD74HC174FPTR 1 A
IC3 2105 5796 IC HD74HC4511FPTR 1 A
Q1 - Q4 2259 2555 Transistor, Chip, Digital UMW1NTL 4 A
Q5 - Q8 2259 2562 Transistor, Chip, Digital UMS1NTL 4 A
Q9 2259 2646 Transistor, Chip, Digital UMH3NTN 1 A
Q10 2259 2548 Transistor, Chip, Digital DTC143EUAT106
Q11 2252 1239 Transistor, Chip 2SC4081-T106Q
D1 2390 2576 Diode, Chip, Schottky RB501V-40TE-17
D3 2390 1820 Diode, Chip 1SS355TE-17 1 B
X1 2590 1526 Oscillator, Ceramic EFO-EN2005C4 1 B
LED1
2
IC301
Q301
Q302, Q305
Q303 2253 0581 Transistor 2SD1858R,S-TV6-T 1 A
Q304 2253 0455
D304 2360 1729 Diode, Zener MTZJ5.1A-T77-T 1 B
D331 2390 0378
D333 2390 1323
D334, D336 2360 2002
LED301 2370 1106
J301 3501 7049
J302 3501 4382
3 6925 6180 Keyboard PCB ass'y M140449*2
4 6925 6183 LED PCB ass'y LD1,2M M140473*1 1
5 6925 1340 LED PCB ass'y LD3M M240428*1 1
6 6925 6184 LED PCB ass'y LD4M M240500*1 1
7 6925 2160 Battery cover M340490*1
8 6925 6261 Slide knob M311859A-6
9 6925 5380 Display plate M340534-2
10 6909 5890 Slide contact CSB-12D
11 3831 1072 Speaker S10JA49A
12 6925 6370 Rubber button M240374-3
13 6906 8371 Rubber button M240414-2
14 6925 6300
15 6925 1700
16 6925 1710
17 6925 1720 Black key set, LSK-10P M140369-1
18 6923 2390
19 6922 4000
2370 1141 LED, 7-seg. SL-9352-60
Sub PCB ass'y
6925 6173 Sub PCB ass'y M140476*2
2114 2891 IC LA4598
2250 0742 Transistor 2SA1703S,T-AN-T
2220 1409 Transistor 2SC1740SR-TP-T
Transistor
2390 1344 Diode 1SS133T-77-T
Diode
Diode
Diode, Zener
LED
Jack, Power
Jack, Phone
Keyboard PCBs
2301 0101 Diode 1S2473T-77-T 49
LED PCBs
2370 1323 LED (for white key) KR3301X-J344K 29
2370 1330 LED (for black key) KR3302X-J345K 20
Mechanical Parts
Rubber button M240413-2
White key set, LSK-CB M340489*1 3
White key set, LSK-CS
Key contact rubber, 18
Key contact rubber, 31
Other
6916 7880 Music stand M310827-1
2SD1762E.F 1 A
1SR139-100T-32-T 1 B
RB100A-T32-T 1 B
MTZJ5.6B-T77-T 2 B
MPR3338S-B99 1 B
HEC2305-01-330 1 B
HSJ2000-01-010 1 B
M340489*2
M240025-1
M111765-1
1
1
1B
1
1
1
1
2
31
1
1
1
1C
1
1
1
1
1
1
2
1
1
1C
A
A
B
B
A
A
A
B
B
B
B
C
B
C
C
B
B
B
B
B
B
B
A
A
A
A
A
— 15 —
Page 19
Nov, 1996
MA1100761A
Loading...