Casio CTK-620L User Manual

ELECTRONIC KEYBOARDCTK-620LCTK-620LTEMPOSYNCHRO/ENDINGINTROVOLUMEMODEPOWERMAXFULL RANGECHORDFINGEREDCASIO CHORDNOMALMINNORMAL/FILL-IN VARIATION/FILL-I

— 9 —LCD DRIVER (LSI401: SED1278F0A)The LCD driver can drive a dot matrix LCD having 40 segment and 15 common lines. The LSI contains 240graphic symbo

— 10 —GATE ARRAY (LSI7: UPD65005GF-419)The gate array can control 63 LEDs of key illuminators. In accordance with the command from the CPU, theLSI is

— 11 —FILTER BLOCKSince the sound signals from the DAC are stepped waveforms, the filter block is added to smooth thewaveforms.POWER AMPLIFIER (IC101:

— 12 —3) Equipment connection/ProcedureVop voltage settingOutputSet VoltmeterTP337.6°LCDEyeWatching the LCD at a 37.6° angle to the horizontal, adjust

— 13 —MAJOR WAVEFORMS1 Clock signal B1Test point T52 Clock signal B2Test point T67 Key common signal KC0JM connector pin 98 Key common signal KC1JM co

— 14 —PRINTED CIRCUIT BOARDSSub PCB JCM447-MA2MTop View Bottom ViewMain PCB JCM447-MA1M123 7 85691210114

— 15 —SCHEMATIC DIAGRAMSMain PCB JCM447-MA1MAT-49-30M411112783562109

— 16 —Sub PCB JCM447-MA2M(5.6 V)(5.6 V)(5.6 V)(0.7 V)(2 V)50V 1µ

— 17 —Console PCB JCM447-CN1M

— 18 —Console PCB JCM447-CN2M

— 1 —SPECIFICATIONSGENERALKeyboard: 61 standard-size keys, 5 octaves (with touch response on/off)Key light system: Can be turned on and off (up to 10

— 19 —Display PCB JCM447-LCD1M

— 20 —Keyboard PCBs JCM618T-KY1M/KY2M

— 21 —LED PCB JCM447-LD1M

— 22 —LED PCB JCM447-LD2M

— 23 —LED PCB JCM447-LD6

— 24 —Console PCBs JCM447-CN3M/CN4M

— 25 —Console PCB JCM447-CN5M

— 26 —LED PCBs JCM447-LD4M/LD5M

— 27 —LED PCB JCM447-LD3M

— 28 —R-42212R-313687R-2231423315322425272629202130R-1333491011181931342817161415EXPLODED VIEW

— 2 —ELECTRICALCurrent drain with 9 V DC: No sound output 200 mA ± 20 % Maximum volume 1090 mA ± 20 %with 10 keys from F1 to A2 pressed in Fre

Notes: This parts list does not include the cosmetic parts, whichparts are marked with item No. "R-X" in the explodedview.Contact our spare

Item Code No. Parts Name Specification Q RMain PCBIC1 2012 1883 IC/MOS RN5VD40AA-TR 1 BIC2 2105 6427 IC/L-MOS TC7WH04FUTE12L 1 BIC3 2105 4935 IC/C-MOS

Item Code No. Part Name Specification Q R11 6926 3150 M446-LD5M PCB ASSY M240430*2 1 B12 6926 3160 M447-LD1M PCB ASSY M240777*1 1 B13 6926 3170 M447-L

MA1100571ANov. 1997Printed in JapanCASIO TECHNO CO.,LTD.8-11-10, Nishi-ShinjukuShinjuku-ku, Tokyo 160, JapanTelephone: 03-3347-4926

— 3 —BLOCK DIAGRAMKC0 ~ KC7FI0 ~ FI7SI0 ~ SI7KI0 ~ KI2MD0 ~ 3L0 ~ L20L21 ~ L23MA0 ~ 2PO10, PO17PO22, PO23PA4 ~ PA6Working StorageRAM (256K-bit)LSI4TC5

— 4 —CIRCUIT DESCRIPTIONKEY MATRIXBUTTON MATRIXKC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7FI0 C2 (1) C#2 (1) D2 (1) D#2 (1) E2 (1) F2 (1) F#2 (1) G2 (1)SI0 C2 (2)

— 5 —LED MATRIXKeySecond contact (2)First contact (1)FIKCSINote: Each key has two contacts, the first conatct (1) and second contact (2).F#

— 6 —emaNegatloVfonoitareporoFDDVV5+,MARtceffE,MARegarotsgnikroW,MORecruosdnuoS,PSD,CIteseR,UPCrevirdDELDDVDV5+UPCkcajIDIM,kcajniatsuS,DDVAV5+retliF,C

— 7 —CPU (LSI1: GT913F)The 16-bit CPU contains a 1k-byte RAM, three 8-bit I/O ports, two timers, a key controller and serial interfaces.The CPU detect

— 8 —DIGITAL SIGNAL PROCESSOR (LSI2: HG51B227FB-1)The DSP receives 16-bit serial sound data output from the CPU and adds the selected effect to the so