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Casio CTK-485 Service Manual

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INDEX
CTK-485
100 TONES
PIANO
ORGAN
GUITAR/BASS
STRINGS/ENSEMBLE
BRASS
REED/PIPE
SYNTH-SOUND 1
SYNTH-SOUND 2
LAYER
00 PIANO 1
10 ELEC ORGAN 1
20 GUT GUITAR
30 VIOLIN
40 TRUMPET
50 SOPRANO SAX
60 SYN-LEAD 1
70 RAIN DROP
80 STR PIANO
01 PIANO 2
11 ELEC ORGAN 2
21 ACOUS GUITAR
31 CELLO
41 TUBA
51 ALTO SAX
61 SYN-LEAD 2
71 COSMIC SOUND
81 STR E. PIANO
02 HONKY-TONK
12 ELEC ORGAN 3
22 JAZZ GUITAR
32 HARP
42 BRASS ENS
52 TENOR SAX
62 SYN-LEAD 3
72 SOUND TRACK
82 CHOIR E. P
83 CHOIR ORGAN
03 STUDIO PIANO
13 ELEC ORGAN 4
23 ELEC GUITAR
33 STRINGS 1
43 FR. HORN 1
53 OBOE
63 SYN-CALLIOPE
73 SPACE PAD
04 ELEC PIANO 1
14 CHURCH ORGAN
24 MUTE GUITAR
34 STRINGS 2
44 FR. HORN 2
54 CLARINET
64 SYN-PAD 1
74 VOICE BASS
84 STR GUITAR
75 APPLAUSE
85 STR HARP
05 ELEC PIANO 2
15 PIPE ORGAN
25 DIST GUITAR
35 STRINGS 3
45 BRASS 1
55 PICCOLO
65 SYN-PAD 2
06 ELEC PIANO 3
16 REED ORGAN
26 WOOD BASS
36 SYNTH-STR 1
46 BRASS 2
56 FLUTE
66 SYN-PAD 3
76 SYNTH-SFX
86 BRASS STR
07 ELEC PIANO 4
17 ACCORDION
27 ELEC BASS
37 SYNTH-STR 2
47 SYN-BRASS 1
57 RECORDER
67 BOWED GLASS
77 VEHICLE
87 VIB PAD
88 12 STR GTR
08 HARPSICHORD
18 BANDONEON
28 SLAP BASS
38 CHOIR
48 SYN-BRASS 2
58 PAN FLUTE
68 COUNTRY FARM
78 PHONE
09 CLAVI
19 HARMONICA
29 BANJO
39 VOICE DOO
49 SYN-BRASS 3
59 WHISTLE
69 SYN-BASS
79 FUNNY
89 CHOIR STR
100 RHYTHMS
00-19 POPS
60-69 EUROPEAN
POWER/MODE
VOLUME
SYNCHRO/
POPS/BALLAD/16 BEAT/8 BEAT
POLKA/MARCH/WALTZ/TANGO
FILL-IN
¢
20-39 ROCK
70-84 LATIN
SLOW ROCK/SOFT ROCK/SOUL/ROCK/R&B
BOSSA NOVA/SAMBA/MAMBO/RHUMBA/REGGAE
FINGERED
40-49 JAZZ
85-99 VARIOUS
BIG BAND/SWING/JAZZ/FUSION
COUNTRY/GOSPEL/ETC.
CASIO CHORD
ON
50-59 DANCE
NORMAL
CLUB/TECHNO/DISCO/RAP/FUNK
OFF
100 SONG BANK KEYBOARD
SONG BANK CONTROLLER
ELECTRONIC KEYBOARD
SPLIT/PERCUSSIVE
00 HOW DEEP IS YOUR LOVE
09 CROCODILE ROCK
19 O CHRISTMAS TREE
90 BASS/PIANO
01 IN THE MOOD
10 SAVING ALL
20 GREENSLEEVES
MY LOVE FOR YOU
21 AMAZING GRACE
91 BASS/E. PIANO
02 A WHOLE NEW WORLD
92 BASS/VIB
03 WHEN YOU WISH
11 THE GIRL FROM IPANEMA
22 AULD LANG SYNE
93 BASS/GUT GTR
UPON A STAR
12 YESTERDAY
23 TWINKLE TWINKLE
04 SUPERSTITION
13 ANOTHER DAY IN PARADISE
LITTLE STAR
94 V.BASS/DOO
95 STR/PIANO
05 I JUST CALLED
14 HAPPY BIRTHDAY TO YOU
24 LIGHTLY ROW
TO SAY I LOVE YOU
15 WE WISH YOU
25 ACH DU LIEBER AUGUSTIN
96 STR/TRUMPET
06 TOP OF THE WORLD
A MERRY CHRISTMAS
26 LONDON BRIDGE
97 VIBRAPHONE
98 MARIMBA
07 KILLING ME SOFTLY
16 JINGLE BELLS
27 J'AI PERDU LE DO
WITH HIS SONG
17 SILENT NIGHT
28 BATTLE HYMN
99 PERCUSSION
08 ALWAYS ON MY MIND
18 WHEN THE SAINTS
OF THE REPUBLIC
GO MARCHING IN
29 SUR LE PONT D'AVIGNON
START/
TEMPO
STOP
¢
0
1
2
3
4
+
MULTI FUNCTION DISPLAY
MULTI FUNCTION DISPLAY
5
6
7
8
9
TRANSPOSE/TUNE
100 SONG BANK
30 GRANDFATHER'S CLOCK
43 HOUSE OF THE RISING SUN
54 HOLDIRIDIA
79 HABANERA "CARMEN"
31 WORKING ON THE RAILROAD
44 AURA LEE
55 SANTA LUCIA
80 L'ARLESIENNE SUITE
32 LITTLE BROWN JUG
45 JAMAICA FAREWELL
56 LA CUCARACHA
1er PRELUDE
33 LONG LONG AGO
46 JOHNNY COMES
57 LA PALOMA
81 JOY TO THE WORLD
34 MICHAEL
MARCHING HOME
58 CIELITO LINDO
82 SYMPHONY no.101
35 DOMINIQUE
47 CAMPTOWN RACES
59 KATIUCHA
"CLOCK" 2nd Mov.
60 TROIKA
83 SPRING
36 DANNY BOY
48 SWANEE RIVER
61 SZTA DZIE WECZKA
37 ANNIE LAURIE
49 JEANNIE WITH
"THE FOUR SEASONS"
38 ALOHA OE
THE LIGHT BROWN HAIR
62
POLKA "THE BARTERED BRIDE"
84
THAIS MEDITATION
63 WALTZING MATILDA
85 MINUET (J.S.BACH)
39 MY BONNIE
50 YANKEE DOODLE
64 AJO MAMMA
86 GAVOTTE (GOSSEC)
40 CLAP YOUR HANDS
51 RED RIVER VALLEY
65 RASA SAYANG
87 CANON (PACHELBEL)
41 MY DARLING CLEMENTINE
52 MY OLD KENTUCKY HOME
66
N Ł
(KANG DING QING GE)
88
LARGO (HANDEL)
42 SHE WORE A YELLOW RIBBON
53 HOME ON THE RANGE
67 ODE TO JOY
89 AMERICAN PATROL
68 BRIDAL MARCH "LOHENGRIN")
90 CHOPSTICKS
SONG BANK CONTROLLER
69 AIR "SUITE no.3"
91 PIANO SONATA op.13
SONG
TONE
BANK
LEFT
ON/OFF
RIGHT
70 LE CYGNE
"PATHETIQUE" 2nd Mov.
"LE CARNAVAL DES ANIMAUX"
92
FUR ELISE
71 SWAN LAKE
93 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)
75 LA DONNA É MOBILE
96 HUNGARIAN DANCE no.5
76 TOY SYMPHONY
97 THE ENTERTAINER
77 SERENADE
98 NOCTURNE op.9 no.2
"EINE KLEINE NACHTMUSIK"
(CHOPIN)
78 CHANSON DU TOREADOR
99 VALSE op.64 no.1
"CARMEN"
"PETIT CHIEN"
RHYTHM
TRANSPOSE/
STOP
PLAY/
TUNE
PAUSE
CTK-485

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  Also See for Casio CTK-485

  Summary of Contents for Casio CTK-485

  • Page 1 CTK-485 100 TONES 100 SONG BANK PIANO ORGAN GUITAR/BASS STRINGS/ENSEMBLE BRASS REED/PIPE SYNTH-SOUND 1 SYNTH-SOUND 2 LAYER SPLIT/PERCUSSIVE 00 HOW DEEP IS YOUR LOVE 09 CROCODILE ROCK 19 O CHRISTMAS TREE 30 GRANDFATHER'S CLOCK 43 HOUSE OF THE RISING SUN 54 HOLDIRIDIA 79 HABANERA "CARMEN"...
  • Page 2: Table Of Contents

    12 notes maximum (6 for certain tones) Auto accompaniment Rhythm Patterns: Tempo: Variable (236 steps, = 20 to 255) Chords: 2 fingering methods (CASIO CHORD, FINGERED) Rhythm controller: START/STOP, SYNCHRO/FILL-IN Song Bank Tunes: Controllers: PLAY/PAUSE, STOP, LEFT (ON/OFF), RIGHT (ON/OFF)
  • Page 3 ELECTRICAL Current drain with 9 V DC: 137 mA ± 20 % No sound output 710 mA ± 20 % Maximum volume with white keys C1 to G2 pressed in Synth-Lead 1 Volume: maximum. Speaker output level (Vrms with 40 Ω load each channel): L-ch: 1,260 mV ±...
  • Page 4: Block Diagram

    BLOCK DIAGRAM — 3 —...
  • Page 5: Circuit Description

    — Tempo Tempo Volume Volume Synchro/ Start/Stop Fill in Transpose/ KO10 Song Bank Rhythm Tone Tune Power Casio KO11 Fingered Normal Chord KO12 Right Play/Pause Stop Left NOMENCLATURE OF KEYS F#3 G#3 A#3 C#4 D#4 F#4 G#4 A#4 C#5 D#5...
  • Page 6 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’...
  • Page 7 Pin No. Terminal In/Out Function 80 ~ 84 KO8 ~ KO12 Terminals for button scan signal 85 ~ 87 P65 ~ P67 — Not used Control signal for the LCD driver Read/Write signal for the LCD driver Chip enable signal for the LCD driver 91 ~ 95 P73 ~ P77 —...
  • Page 8 FILTER BLOCK Since the sound signals from the CPU is stepped waveforms, the filter block is added to smooth the waveforms. Amp. Filter LA4598 MSM6755B-17 Block POWER AMPLIFIER (IC101: LA4598) The power amplifier is a two-channel amplifier with standby switch. The following table shows the pin function of IC101.
  • Page 9: Troubleshooting

    INITIAL RESET CIRCUIT When batteries are set or an AC adapter is connected, the reset IC provides a low pulse to the CPU. The CPU then initializes its internal circuit. Battery Set Reset IC MSM 6755B-17 RN5VD40A LSI1 RESET TROUBLESHOOTING Nature of Trouble Faulty Block Cause/Remedy...
  • Page 10: Adjustment

    ADJUSTMENT MAIN PCB 1) Items to be adjusted: Item Measuring Instrument Vop voltage setting Voltmeter 2) Adjustment and Test Point Locations (Top View) (Bottom View) 3) Equipment connection/Procedure Vop voltage setting Voltmeter Output Input Input Input Output Output Adjust Adjust for Point Signal Connection...
  • Page 11: Major Waveforms

    MAJOR WAVEFORMS 20 µs 0.1 s 1 RESET signal 2 Main clock pulse IC 1 pin 1 MSM6755B-17 pin 32 10 µs 3 Key scan signal KO10 5 Sound signal output (L-ch) MSM6755B-17 pin 72 MSM6755B-17 pin 47 4 Key scan signal KO11 6 Sound signal output (L-ch) MSM6755B-17 pin 73 Q106 2SC1740SQ Emitter...
  • Page 12: Printed Circuit Boards

    PRINTED CIRCUIT BOARDS Main PCB JCM450-MA1M Top View Bottom View — 11 —...
  • Page 13 Main PCB JCM450-MA2M Keyboard PCB KDM6111K-KY1M Keyboard PCB KDM6111K-KY2M — 12 —...
  • Page 14: Schematic Diagrams

    SCHEMATIC DIAGRAMS Main PCB JCM450-MA1M — 13 —...
  • Page 15 Main PCB JCM450-MA2M (5.3 V) (0.7 V) (2.9 V) — 14 —...
  • Page 16 Keyboard PCBs KDM6111K-KY1M/KY2M Notes: µF). 1. All capacitance values are indicated in "µF" (p=10 Ω, M=10 Ω). 2. All resistance values are indicated in "Ω" (k=10 — 15 —...
  • Page 17: Exploded View

    EXPLODED VIEW — 16 —...
  • Page 18: Parts List

    PARTS LIST CTK-485 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. Prices and specifications are subject to change with- out prior notice.
  • Page 19 Item Code No. Parts Name Specification Main PCB 6926 6310 PCB ASSY/M450-MA1M M240821*1 6926 6320 PCB ASSY/M450-MA2M M140731*1 2390 1820 DIODE/CHIP 1SS355TE-17 2390 3021 DIODE SRT14 D101 2390 3018 DIODE D102 D103,D104 2390 1344 DIODE 1SS133T-77-T 11 C D106 - D114 D105 2360 1939 DIODE MTZJ5.1CT-77-T...
  • Page 20 CASIO TECHNO CO.,LTD. Overseas Service Division 8-11-10, Nishi-Shinjuku Shinjuku-ku, Tokyo 160-0023, Japan...