Casio CTK-485 User Manual
CTK-485
INDEX
PIANO
ORGAN
00 PIANO 1
10
01 PIANO 2
11
12
02 HONKY-TONK
STUDIO PIANO
13
03
04 ELEC PIANO 1
14
05 ELEC PIANO 2
15 PIPE ORGAN
06 ELEC PIANO 3
16
17 ACCORDION
07 ELEC PIANO 4
18
HARPSICHORD
08
09 CLAVI
19 HARMONICA
00-19 POPS
POPS/BALLAD/16 BEAT/8 BEAT
20-39 ROCK
SLOW ROCK/SOFT ROCK/SOUL/ROCK/R&B
40-49 JAZZ
BIG BAND/SWING/JAZZ/FUSION
50-59 DANCE
CLUB/TECHNO/DISCO/RAP/FUNK
100 SONG BANK KEYBOARD
SONG BANK CONTROLLER
ELEC ORGAN 1
ELEC ORGAN 2
ELEC ORGAN 3
ELEC ORGAN 4
CHURCH ORGAN
REED ORGAN
BANDONEON
GUITAR/BASS
STRINGS/ENSEMBLE
20 GUT GUITAR
30 VIOLIN
21
31 CELLO
ACOUS GUITAR
22 JAZZ GUITAR
32 HARP
23 ELEC GUITAR
33 STRINGS 1
24 MUTE GUITAR
34 STRINGS 2
25 DIST GUITAR
35 STRINGS 3
26 WOOD BASS
36 SYNTH-STR 1
27 ELEC BASS
37 SYNTH-STR 2
28 SLAP BASS
38 CHOIR
29 BANJO
39 VOICE DOO
100 RHYTHMS
60-69 EUROPEAN
POLKA/MARCH/WALTZ/TANGO
70-84 LATIN
BOSSA NOVA/SAMBA/MAMBO/RHUMBA/REGGAE
85-99 VARIOUS
COUNTRY/GOSPEL/ETC.
BRASS
40 TRUMPET
41 TUBA
42 BRASS ENS
43 FR. HORN 1
44 FR. HORN 2
45 BRASS 1
46 BRASS 2
SYN-BRASS 1
47
48
SYN-BRASS 2
49
SYN-BRASS 3
100 TONES
REED/PIPE
50
SOPRANO SAX
51 ALTO SAX
52 TENOR SAX
53 OBOE
54 CLARINET
55 PICCOLO
56 FLUTE
57 RECORDER
58 PAN FLUTE
59 WHISTLE
ON
OFF
POWER/MODE
SYNTH-SOUND 1
60 SYN-LEAD 1
61 SYN-LEAD 2
62 SYN-LEAD 3
SYN-CALLIOPE
63
64 SYN-PAD 1
65 SYN-PAD 2
66 SYN-PAD 3
BOWED GLASS
67
68
COUNTRY FARM
69 SYN-BASS
FINGERED
CASIO CHORD
NORMAL
SYNTH-SOUND 2
70 RAIN DROP
COSMIC SOUND
71
72
SOUND TRACK
73 SPACE PAD
74 VOICE BASS
75 APPLAUSE
76 SYNTH-SFX
77 VEHICLE
78 PHONE
79 FUNNY
LAYER
SPLIT/PERCUSSIVE
80 STR PIANO
90 BASS/PIANO
BASS/E. PIANO
81 STR E. PIANO
91
92 BASS/VIB
82 CHOIR E. P
CHOIR ORGAN
BASS/GUT GTR
93
83
84 STR GUITAR
94 V.BASS/DOO
85 STR HARP
95 STR/PIANO
STR/TRUMPET
86 BRASS STR
96
97 VIBRAPHONE
87 VIB PAD
98 MARIMBA
88 12 STR GTR
99 PERCUSSION
89 CHOIR STR
SYNCHRO/
VOLUME
START/
TEMPO
FILL-IN
¢
¢
STOP
⁄
⁄
TRANSPOSE/TUNE
ELECTRONIC KEYBOARD
MULTI FUNCTION DISPLAYMULTI FUNCTION DISPLAY
09 CROCODILE ROCK
HOW DEEP IS YOUR LOVE
00
10 SAVING ALL
01 IN THE MOOD
MY LOVE FOR YOU
A WHOLE NEW WORLD
02
THE GIRL FROM IPANEMA
11
03 WHEN YOU WISH
12 YESTERDAY
UPON A STAR
ANOTHER DAY IN PARADISE
13
04 SUPERSTITION
14
HAPPY BIRTHDAY TO YOU
05 I JUST CALLED
15 WE WISH YOU
TO SAY I LOVE YOU
A MERRY CHRISTMAS
06 TOP OF THE WORLD
16 JINGLE BELLS
07 KILLING ME SOFTLY
17 SILENT NIGHT
WITH HIS SONG
18 WHEN THE SAINTS
08
ALWAYS ON MY MIND
GO MARCHING IN
051627384
19 O CHRISTMAS TREE
20 GREENSLEEVES
21 AMAZING GRACE
22 AULD LANG SYNE
23 TWINKLE TWINKLE
LITTLE STAR
24 LIGHTLY ROW
ACH DU LIEBER AUGUSTIN
25
26 LONDON BRIDGE
27 J'AI PERDU LE DO
28 BATTLE HYMN
OF THE REPUBLIC
29
SUR LE PONT D'AVIGNON
9
TONE LEFT
+
– RHYTHM
100 SONG BANK
GRANDFATHER'S CLOCK
30
WORKING ON THE RAILROAD
31
32 LITTLE BROWN JUG
33 LONG LONG AGO
34 MICHAEL
35 DOMINIQUE
36 DANNY BOY
37 ANNIE LAURIE
38 ALOHA OE
39 MY BONNIE
40 CLAP YOUR HANDS
41
MY DARLING CLEMENTINE
42
SHE WORE A YELLOW RIBBON
SONG
BANK
TRANSPOSE/
TUNE
43
HOUSE OF THE RISING SUN
44 AURA LEE
45 JAMAICA FAREWELL
46 JOHNNY COMES
MARCHING HOME
47 CAMPTOWN RACES
48 SWANEE RIVER
JEANNIE WITH
49
THE LIGHT BROWN HAIR
50 YANKEE DOODLE
51 RED RIVER VALLEY
52
MY OLD KENTUCKY HOME
53 HOME ON THE RANGE
SONG BANK CONTROLLER
ON/OFF RIGHT
STOP PLAY/
79 HABANERA "CARMEN"
54 HOLDIRIDIA
55 SANTA LUCIA
80 L'ARLESIENNE SUITE
1er PRELUDE
56 LA CUCARACHA
57 LA PALOMA
81 JOY TO THE WORLD
58 CIELITO LINDO
82 SYMPHONY no.101
59 KATIUCHA
"CLOCK" 2nd Mov.
60 TROIKA
83 SPRING
61 SZTA DZIE WECZKA
"THE FOUR SEASONS"
84
62
POLKA "THE BARTERED BRIDE"
THAIS MEDITATION
85 MINUET (J.S.BACH)
63 WALTZING MATILDA
86 GAVOTTE (GOSSEC)
64 AJO MAMMA
87 CANON (PACHELBEL)
65 RASA SAYANG
88
66
NŁ
(KANG DING QING GE)
LARGO (HANDEL)
67 ODE TO JOY
89 AMERICAN PATROL
68
BRIDAL MARCH "LOHENGRIN")
90 CHOPSTICKS
91 PIANO SONATA op.13
69 AIR "SUITE no.3"
70
LE CYGNE
"PATHETIQUE" 2nd Mov.
92
"LE CARNAVAL DES ANIMAUX"
FUR ELISE
93
71 SWAN LAKE
TURKISH MARCH (MOZART)
72
MARCH "THE NUTCRACKER"
94
PIANO SONATA K.545 1st Mov.
73
BRINDISI "LA TRAVIATA"
95 WEDDING MARCH
74
TRIUMPHAL MARCH "AIDA"
(MENDELSSOHN)
96 HUNGARIAN DANCE no.5
75 LA DONNA É MOBILE
97 THE ENTERTAINER
76 TOY SYMPHONY
77
98 NOCTURNE op.9 no.2
SERENADE
(CHOPIN)
"EINE KLEINE NACHTMUSIK"
99 VALSE op.64 no.1
78
CHANSON DU TOREADOR
"PETIT CHIEN"
"CARMEN"
PAUSE
CTK-485
CONTENTS
Page
Specifications............................................................................................................................................ 1
Block Diagram........................................................................................................................................... 3
Circuit Description..................................................................................................................................... 4
Troubleshooting ........................................................................................................................................ 8
Adjustment ................................................................................................................................................ 9
Major Waveforms .................................................................................................................................... 10
Printed Circuit Boards ............................................................................................................................. 11
Schematic Diagrams ............................................................................................................................... 13
Exploded View ........................................................................................................................................ 16
Parts List ................................................................................................................................................. 17
SPECIFICATIONS
GENERAL
Model: CTK-485
Keyboard: 61 standard-size keys, 5 octaves
Tones: 100
Polyphony: 12 notes maximum (6 for certain tones)
Auto accompaniment
Rhythm Patterns: 100
Tempo: Variable (236 steps, = 20 to 255)
Chords: 2 fingering methods (CASIO CHORD, FINGERED)
Rhythm controller: START/STOP, SYNCHRO/FILL-IN
Song Bank
Tunes: 100
Controllers: PLAY/PAUSE, STOP, LEFT (ON/OFF), RIGHT (ON/OFF)
Multi function display
Name display: TONE, RHYTHM, SONG BANK name/number, keyboard settings name/
value
Tempo: Tempo value, metronome, synchro standby, beat indicator
Other functions
Transpose: 12 steps (–6 semitones to +5 semitones)
Tuning: Variable (A4 = approximately 440 Hz ± 50 cents)
Volume: 0 to 9 (10 steps)
Terminals
Phones/output terminal: Stereo standard jack
Output Impedance: 70 Ω
Output Voltage: 2.4 V (RMS) MAX
Power supply terminal: 9 V DC
Power supply: Dual power supply system
Batteries: 6 AA-size batteries
Battery life: Approximately 2 hours (SUM-3/R6P)/4 hours (AM3/LR6)
AC adaptor: AD-5
Auto power off: Turns power off approximately 6 minutes after last key operation. Enabled
under battery power only, can be disabled manually.
Speaker output: 2.0 W + 2.0 W
Power consumption: 9 V . . . 7.0 W
Dimensions (HWD): 91.0 × 32.2 × 9.0 cm (35 7/8 × 12 11/16 × 3 9/16 inches)
Weight: Approximately 4.0 kg (8.8 lbs) (without batteries)
— 1 —
ELECTRICAL
Current drain with 9 V DC:
No sound output 137 mA ± 20 %
Maximum volume 710 mA ± 20 %
with white keys C1 to G2 pressed in Synth-Lead 1
Volume: maximum.
Speaker output level (Vrms with 40 Ω load each channel):
with key A1 pressed in Synth-Lead 1 L-ch:1,260 mV ± 20%
R-ch:1,200 mV ± 20%
Phone output level (Vrms with 8 Ω load each channel):
with key A2 pressed in Synth-Lead 1 L-ch: 93 mV ± 20%
R-ch: 90 mV ± 20%
Minimum operating voltage: 6.0 V
— 2 —
CPU
MSM 6755B-17
LSI1
Keyboard
Buttons
LCD
LCD Driver
KS0066U-10B
LSI3
Reset IC
IC1
Power
Switch
Oscillator
X1, Q1
Power Supply Circuit
Q101 ~ Q104, D205
Power Amp.
LA4598
IC101
Filter (L)
Q106
Filter (R)
Q107
Phones/Output
Speaker (L)
Speaker (R)
VC VCC DVDD AVDD
APO
MD0 ~ MD7
MA0 ~ MA18
DC + 9 V IN
DB4 ~ DB7
COM1 ~ COM14
SEG1 ~ SEG40
RS
R/W
E
KO8 ~
KO12
KI0 ~ KI6
KI0 ~ KI7
KO0 ~ KO7
ROM(2M-bit)
LC372100PM-
H78
LSI2
BLOCK DIAGRAM
— 3 —
CIRCUIT DESCRIPTION
KEY MATRIX
KI0 KI1 KI2 KI3 KI4 KI5 KI6 KI7
KO0 C1 G#1 E2 C3 G#3 E4 C5 G#5
KO1 C#1 A1 F2 C#3 A3 F4 C#5 A5
KO2 D1 A#1 F#2 D3 A#3 F#4 D5 A#5
KO3 D#1 B1 G2 D#3 B3 G4 D#5 B5
KO4 E1 C2 G#2 E3 C4 G#4 E5 C6
KO5 F1 C#2 A2 F3 C#4 A4 F5
KO6 F#1 D2 A#2 F#3 D4 A#4 F#5
KO7 G1 D#2 B2 G3 D#4 B4 G5
KO8 — + 0 Tempo ▼ Tempo ▲ Volume ▼ Volume ▲
KO9 3 2 1 Start/Stop
KO10 6 5 4 Song Bank Rhythm Tone
Transpose/
Tune
KO11 9 8 7 Fingered Normal
Synchro/
Fill in
Casio
Chord
Power
KO12 Right Play/Pause Stop Left
NOMENCLATURE OF KEYS
C#2
C2 D2E2F2G2A2 B2 C3 D3
F#2D#2
C#3A#2G#2
F#3 G#3
D#3
E3
F3 G3 A3 B3 C4 D4 E4 F4 G4 A4 B4 C5 D5 E5 F5 G5 A5 B5
A#3 C#4 D#4
F#4 G#4
A#4
C#5
D#5
F#5 G#5
A#5
C#6
C6
off
G#6F#6D#6
A#6
B6A6G6F6E6D6
C7
— 4 —
CPU (LSI1: MSM6755B-17)
The CPU reads sound data from the ROM in accordance with the pressed key and the selected tone; the CPU
can read rhythm data simultaneously when a rhythm pattern is selected. Then it provides the left and the right
channels’ waveforms separately, by converting the data into the waveforms with two built-in DACs. The CPU
also controls key and button input. The following table shows the pin functions of LSI1.
Pin No. Terminal In/Out Function
1 MA14 Out Address bus
2, 3 NCO — Not used
4 ~ 19 MA0 ~ MA13 Out Address bus
13 MRDB Out Read enable signal
17 MCSB — Not used
20 ~ 27 MD0 ~ MD7 In/Out Data bus
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, 37 P24/RXD, 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
47 DAOL Out Left channel sound waveform output
48 REFL Out Terminal for the internal DAC and ADC
49 AGdac In Ground source for internal DAC
50 AGadc In Ground source for internal ADC
51 ANI In APO cancellation signal
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 — Not used
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 DB4 ~ DB7 Out Data bus for the LCD driver
78 NC9 — Not used
79 LVCC In +5 V source
— 5 —
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