Casio WK-1200 Service Manual Download Page 4 | Manualshive

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BLOCK DIAGRAM

KC0 ~ KC7

FI0 ~ FI9
SI0 ~ SI9

KI0 ~ KI2
PB0 ~ PB3

P10, P13
P14, P17

Working Storage

RAM (256K-bit)

LSI4

TC55257DFL-70L(EL)

MIDI

EA0 ~
EA14

EIO0 ~
EIO7

Sound Source ROM

(16M-bit)

LSI3

MX23C1610MC-

12CA64

LRCK
SO
BCK

D/A Converter

IC1

UPD6379GR

Filter

Q308 ~ Q311

Main
Volume

Power Amplifier

IC301

LA4620

Keyboard

MA0 ~ MA19

Power Supply Circuit

Q301 ~ Q304, 306, 307

D307, 310

VCC

AVDD

VDD

CVDD

LVDD

VC

APO

Effect RAM

(256K-bit)

LSI5

TC55257DFL-

70L(EL)

MD0

~

MD7

Speakers

Output

MA0

~

MA14

MA0, MA1

LRCK, SO
BCK, SINK

LCD

LCD Driver

LSI501

SED1278F0A

SEG1 ~ SEG40

IN

OUT

Reset IC

IC2

RN5VD40AA

RESET

COM1 ~ COM16

DSP

LSI2

HG51B277FB-1

MD0 ~ MD15

CPU

LSI1

GT-913F

Buttons

Assingnable Jack

PB4

VDD

Power Switch

NMI

FI10

P23

PA0 ~ PA5

PB0 ~ PB3

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Summary of Contents for WK-1200

Page 1: ...INFORMATION SYSTEM MEMORY STEP TEMPO ACCOMP VOLUME SYNCHRO ENDING INTRO NORMAL FILL IN VAR FILL IN AMP ENVELOPE 000 048 DECAY PITCH ENVELOPE 00 FLAT 049 137 SUSTAIN 01 19 VIBRATO 20 49 OTHERS MODE POW...

Page 2: ...sion Memory function Songs 2 Recording tracks 6 2 through 6 are melody tracks Recording methods Real time step Memory capacity Approximately 5 200 notes total for two songs Edit function Equipped Demo...

Page 3: ...sources This standard makes it possible for all MIDI equipment to reproduce the same nuances when playing General MIDI data regardless of the manufacturer of the sound source This keyboard supports G...

Page 4: ...1 Main Volume Power Amplifier IC301 LA4620 Keyboard MA0 MA19 Power Supply Circuit Q301 Q304 306 307 D307 310 VCC AVDD VDD CVDD LVDD VC APO Effect RAM 256K bit LSI5 TC55257DFL 70L EL MD0 MD7 Speakers O...

Page 5: ...I F 1 3 G 1 3 A 1 3 A 1 3 B 1 4 C 1 4 C 1 4 D 1 4 D 4 I S 2 3 G 2 3 A 2 3 A 2 3 B 2 4 C 2 4 C 2 4 D 2 4 D 5 I F 1 4 E 1 4 F 1 4 F 1 4 G 1 4 G 1 4 A 1 4 A 1 4 B 5 I S 2 4 E 2 4 F 2 4 F 2 4 G 2 4 G 2 4...

Page 6: ...2 G DRUM TEMPO KI1 PAD 5 STEP H E 7 2 0 DEMO CHORD 5 DRUM TEMPOG TRANSPOSE KI2 PAD 6 MEMORY G F 4 5 1 CHORD 6 TUNE MIDI POWER SUPPLY CIRCUIT The power supply circuit generates five voltages as shown i...

Page 7: ...GHT When voltage CVDD is supplied transistors Q501 and 502 start oscillation From the oscillation voltage transformer T501 generates about 600 V which is necessary for lighting the backlight Reset IC...

Page 8: ...A e h t l e c n a c o t 9 1 N A n I r e d n e b h c t i p m o r f t u p n I 0 1 D N G A n I e c r u o s V 0 d n u o r G 1 1 K C B t u O t u p t u o k c o l c t i B 2 1 O S t u O t u p t u o a t a d d...

Page 9: ...w r o f l a n g i s e l b a n e a t a D 0 3 B E W n I l a n g i s e l b a n e e t i r W 1 3 3 D D V n I e c r u o s V 5 2 3 2 E C n I e v i t c a h g i H t u p n i l a n g i s e l b a n e p i h C 3 3...

Page 10: ...ng up to 16 characters simultaneously The following table shows the pin functions of LSI 501 Pin No Terminal In Out Function 1 22 SEG1 SEG40 Out Segment signal output 63 80 23 VSS GND 0 V source 24 25...

Page 11: ...ht and left channels The DAC converts the data into analog waveforms and output them to each channel separately Synch signal Data Word clock Bit clock Data Word clock Bit clock DSP LSI2 HG51B277FB 1 D...

Page 12: ...Input Amp Power Amp 9 7 3 5 Input Amp Pre drive Amp Power Amp Input Amp Pre drive Amp Power Amp 4 19 20 21 22 23 1 18 17 15 14 8 RL Short Protector RL Short Protector Terminal Protection Circuit Pop...

Page 13: ...eading on voltmeter Makefineadjustment accord ing to the next instruction Watching the LCD at a 37 40 angle to the horizontal adjust Vop voltage so that unenergized segments are seen dimly ADJUSTMENT...

Page 14: ...JC connector pin 3 6 Key common signal KC1 JC connentor pin 4 7 Sound signal LMEL Test point T2 8 Sound signal RMEL Test point T1 9 Sound signal LIN JK connector pin 1 0 Sound signal RIN JK connector...

Page 15: ...14 PRINTED CIRCUIT BOARDS Main PCB JCM730 MA1M Sub PCB JCM730 MA2M Top View Bottom View 5 6 3 2 7 8 1 4 9 10...

Page 16: ...15 SCHEMATIC DIAGRAMS Main PCB JCM730 MA1M 8 7 2 3 1 4 6 5...

Page 17: ...16 Sub PCB JCM730 MA2M 10 9...

Page 18: ...17 Console PCBs JCM730 CN1M CN2M CN3M CN4M...

Page 19: ...18 LCD Driver PCB JCM730 LCD1M...

Page 20: ...19 Keyboard PCBs JCM731T KY1M KY2M KY3M...

Page 21: ...21 EXPLODED VIEW 19 20 3 1 4 6 6 5 2 35 9 8 13 14 33 22 21 22 31 32 30 19 18 11 10 27 29 34 24 7 28 28 23 25 26 12 R 4 R 5 R 3 R 1 R 2 15 17 18 16...

Page 22: ...r spare parts department if you need these parts for refurbish 1 Prices and specifications are subject to change with out prior notice 2 As for spare parts order and supply refer to the GUIDEBOOK for...

Page 23: ...1 B J302 3612 0665 JACK YKB21 5006 1 B J303 3612 0789 JACK YKB21 5010 1 B J304 3501 4816 JACK DIN YKF51 5051 1 B BL ass y 3 6925 8950 BL ASSY M240682 1 1 B 4 6925 8960 PCB ASSY LCD1M M240678 1 1 B 5...

Page 24: ...A 21 6909 5890 SWITCH SLIDE KNOB CSB 12D 1 B 22 6921 5031 KNOB M311859A 1 2 B 23 6925 9380 RUBBER BUTTON M240641 1 1 B 24 6925 9390 RUBBER BUTTON M240636 1 1 B 25 6925 9400 RUBBER BUTTON M240638 1 1 B...

Page 25: ...8 11 10 Nishi Shinjuku Shinjuku ku Tokyo 160 Japan Telephone 03 3347 4926 MA0700571A...

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