ELECTRONIC KEYBOARD
CTK-520L
CTK-520L
TONE RHYTHM
SONG
POWER/MODE
FINGERED
CASIO CHORD
NORMAL
ON
OFF
VOLUME
SYNCHRO/
FILL-IN
START/
STOP
TEMPO
¢
/
¢
/
TRANSPOSE/TUNE
0
5
1
6
2
7
3
8
4
9
TONE
RHYTHM
SONG
BANK
PART
SELECT
PIANO
00 PIANO 1
01 PIANO 2
02 HONKY-TONK
03 STUDIO PIANO
04 ELEC PIANO 1
05 ELEC PIANO 2
06 ELEC PIANO 3
07 ELEC PIANO 4
08 HARPSICHORD
09 CLAVELECTRO
ORGAN
10 ELEC ORGAN 1
11 ELEC ORGAN 2
12 ELEC ORGAN 3
13 ELEC ORGAN 4
14 CHURCH ORGAN
15 PIPE ORGAN
16 REED ORGAN
17 ACCORDION
18 BANDONEON
19 HARMONICA
GUITAR/BASS
20 GUT GUITAR
21 ACOUS GUITAR
22 JAZZ GUITAR
23 ELEC GUITAR
24 MUTE GUITAR
25 DIST GUITAR
26 WOOD BASS
27 ELEC BASS
28 SLAP BASS
29 BANJO
STRINGS/ENSEMBLE
30 VIOLIN
31 CELLO
32 HARP
33 STRINGS 1
34 STRINGS 2
35 STRINGS 3
36 SYNTH-STR 1
37 SYNTH-STR 2
38 CHOIR
39 VOICE
BRASS
40 TRUMPET
41 TUBA
42 BRASS SECTION
43 FRENCH HORN 1
44 FRENCH HORN 2
45 BRASS 1
46 BRASS 2
47 SYNTH-BRASS 1
48 SYNTH-BRASS 2
49 SYNTH-BRASS 3
REED/PIPE
50 SOPRANO SAX
51 ALTO SAX
52 TENOR SAX
53 OBOE
54 CLARINET
55 PICCOLO
56 FLUTE
57 RECORDER
58 FLUTE ENSEMBLE
59 WHISTLE
SYNTH-SOUND 1
60 SYNTH-LEAD 1
61 SYNTH-LEAD 2
62 SYNTH-LEAD 3
63 SYNTH-CALLIOPE
64 SYNTH-PAD 1
65 SYNTH-PAD 2
66 SYNTH-PAD 3
67 GLESS HARMONICA
68 COUNTRY FARM
69 SYNTH-BASS
SYNTH-SOUND 2
70 PEARL DROP
71 COSMIC SOUND
72 SOUNDTRACK
73 SPACE PAD
74 SYNTH-SFX
75 SE 1 (VEHICLE)
76 SE 2 (TELEPHONE)
77 SE 3 (SPACE)
78 SE 4 (INVADER)
79 SE 5 (FUNNY)
LAYER
80 STRINGS PIANO
81 STRINGS EP
82 CHOIR EP
83 CHOIR ORGAN
84 STRINGS GUITAR
85 STRINGS HARP
86 BRASS STRINGS
87 VIB PAD
88 12STR GUITAR
89 CHOIR STRINGS
SPLIT/PERCUSSION
90 BASS/PIANO
91 BASS/E.PIANO
92 BASS/VIB
93 BASS/G.GUITAR
94 BASS/D.GUITAR
95 STRINGS/PIANO
96 STRINGS/TRUMPET
97 VIBRAPHONE
98 MARIMBA
99 PERCUSSION
100 TONES
3-STEP LESSON
ONE KEY PLAY
STEP 1
STEP 2
STEP 3
DEMO
POPS
00 POP FUSION
01 BALLAD
02 POP BALLAD
03 RAP POP
04 SOUL BALLAD
05 FUNKY POP
06 16BEAT
07 8BEAT 1
08 8BEAT 2
09 POPS
ROCK
10 ROCK WALTZ
11 SLOW ROCK
12 SOFT ROCK 1
13 SOFT ROCK 2
14 FOLKIE POP
15 60's SOUL
16 ROCK
17 HEAVY METAL
18 50's ROCK
19 CHICAGO BLUES
JAZZ/DANCE
20 BIG BAND
21 SLOW SWING
22 FOX TROT
23 JAZZ WALTZ
24 ACID JAZZ
25 LATIN FUSION
26 TRANCE
27 DISCO
28 RAP
29 FUNK
EUROPEAN/LATIN
30 POLKA
31 MARCH
32 SLOW WALTZ
33 WALTZ
34 TANGO
35 BOSSA NOVA
36 SAMBA
37 MAMBO
38 RHUMBA
39 CHA-CHA-CHA
VARIOUS
40 MERENGUE
41 REGGAE
42 SKA
43 TEX-MEX
44 FOLKLORE
45 COUNTRY
46 SLOW GOSPEL
47 ADANI
48 BAROQUE
49 ENKA
01 TWINKLE TWINKLE
LITTLE STAR
02 ACH DU LIEBER AUGUSTIN
03 AMAZING GRACE
04 ODE TO JOY
05 LONDON BRIDGE
06 LONDONDERRY AIR
07 GREENSLEEVES
08 AULD LANG SYNE
00 WHEN YOU WISH
UPON A STAR
11 OVER THE RAINBOW
12 O CHRISTMAS TREE
13 YANKEE DOODLE
14 SANTA LUCIA
15 WHEN THE SAINTS
GO MARCHING IN
16 ALOHA OE
17
09 JOY TO THE WORLD
10 JINGL BELLS
SPRING FROM
"THE FOUR SEASONS"
20 IMAGINE
21
22 LITTLE BROWN JUG
23 MARCH FROM
"THE NUTCRACKER"
24 THE ENTERTAINER
25
18 STAND BY ME
19 YOU CAN'T HURRY LOVE
SERENADE
"EINE KLEINE NACHTMUSIK"
I JUST CALLED TO
SAY I LOVE YOU
28 FROM THE NEW WORLD
29
31 CANON(PACHELBEL)
32 SILENT NIGHT
34
THE ENTERTAINER
35
26 THE GIRL FROM IPANEMA
27 LOVE STORY
ETUDE op.10, no.3
"CHANSON DE L' ADIEU"
MISTY
30 MINUET(J.S.BACH)
33 CLAIR DE LUNE
38
36 MOON RIVER
37 FUR ELISE
39 INVENTION no.1
TURKISH MARCH
(RONDO ALLA TURCA)
40 SONG BANK
50 RHYTHMS
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
-- 1 --
SPECIFICATIONS
GENERAL
Number of keys:
61
Polyphonic:
12-note
Preset tones:
100
Transpose:
F# ~ C ~ F: half-note
Auto-rhythms:
50, Tempo: Adjustable, 216 steps (40 ~ 255), initial value: 120
Accompaniment:
CASIO Chord, Fingered
Song bank:
40-tune
Digital volume control:
10 steps (0 ~ 9), initial value: 7
Tuning control:
440 Hz
± 50 cents
Built-in speakers:
10 cm dia. 2 W input rating: 2 pcs
Terminals:
Headphone Jack (Output impedance: 50 ohm, Output voltage: 4.6 V (rms) MAX
AC Adapter Jack (9 V) , Stereo standard Jack [Output impedance: 50
, Output
voltage: 2 V(rms) MAX]
Auto power off:
Approximately 6 minutes after the last operation
Power source:
2-way AC or DC source
AC: AC adapter
DC: 6 AA size
Power consumption:
7.7 W
Dimensions (HWD):
89
× 924 × 325 mm (3-1/2 × 36-7/16 × 12-13/16 inches)
Weight:
4.35 kg (9.6 lbs) excluding batteries
ELECTRICAL
Current drain with 9 V DC:
No sound output
130 mA
± 20%
Maximum volume
810 mA
± 20%
with white keys C1 to G2 pressed in Synth-Lead 1
Volume: Maximum
Phone output level (Vrms with 8 ohm load each channel):
with key D3 pressed in Synth-Lead 1
95 mV
± 20%
Speaker output level (Vrms with 4 ohm load each channel):
with key D3 pressed in Synth-Lead 1
1050 mV
± 20%
Minimum operating voltage:
6.3 V
-- 2 --
Buttons
Illuminant
Keyboard
7
seg.
LED
LED
Latch
IC2,
IC3
Q5
~Q8
Q1
~Q4
PG
X1,
Q11
Reset
IC
IC1
Q307
Power
Supply
Circuit
Q301
~Q304
D334,
D335
Amp.
IC301
LA4598
Filter
(L)
Q306
Filter
(R)
Q305
Phone/Output
DC+9V
IN
APO
Cancellation
Signal
APO
MA0
~
MA16
MD0
~MD7
Sound
Source
ROM
LSI2
MX23C1010MC-12CA45
KO8
~KO11
LY0
~
LY7
KO0
~KO7
LX0
~
LX7
KI0
~KI7
CPU
LSI1
MSM
6755B-07
LED
Driver
LED
Driver
BLOCK
DIAGRAM
-- 5 --
Amp.
IC301
Filter Block
Q305/Q306
CPU
LSI1
FILTER BLOCK
Since the sound signal from the CPU is a stepped waveform, the filter block is added to smooth the waveform.
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
LED DRIVING
LG
LVDD
CPU
LSI1
MSM6755B-07
LX0 ~ LX7
LY0 ~ LY7
Q1 ~ Q4
Q5 ~ Q8
Q2 ~ Q4
La ~ Lg
(Common)
(Segment)
MWEB
LED
Latch
IC3
7-segment LED
Keyboard LEDs
LED
Latch
IC2
MD0 ~ MD3
MD4 ~ MD7
MA0