Casio CTK-220L User Manual

ELECTRONIC KEYBOARDCTK-220LCTK-220L25 RHYTHMSPOWER/MODEFINGEREDCASIO CHORDNORMALVOLUME SYNCHRO/FILL-INSTART/STOPTEMPOTONESONGBANKSTEP 1 STEP 2 STEP

— 8 —Connected to KDM4910K-KY2MConnected to KDM445-LD2MNote: KI signals are renamed. (e.g. KI0 on the keyboard PCB ⇒ KI1 on the main PCB)NO USE FOR CT

— 9 —Sub PCBs KDM445-MA2M/MA3M

— 10 —Keyboard PCBs KDM4910K-KY1M/KY2M

— 11 —LED PCB KDM446-LD1M

— 12 —PCB NAMELED PCB KDM445-LD2M

— 13 —PCB NAMEPCB NAMELED PCB KDM446-LD3MLED PCB KDM445-LD4M

111034R-3R-411413122181915165617978R-2R-1EXPLODED VIEW— 14 —

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 PCB1 6925 6160 Main PCB ass'y (MA1M) M240438*3 1 BLSI1 2012 4690 LSI, CPU MSM6755B-13 1 AIC1 2105

MA1100761ANov, 1996

CONTENTSPageSpecifications ...

— 1 —SPECIFICATIONSGENERALNumber of keys: 49Polyphonic: 12-notePreset tones: 100Transpose: F# ~ C ~ F: half-noteAuto-rhythms: 25, Tempo: Adjustable, 2

— 2 —BLOCK DIAGRAMButtonsIlluminantKeyboard7 seg. LEDLED Latch IC2, IC3Q5 ~ Q8Q1 ~ Q4PGX1, Q11Reset ICIC1Power Supply CircuitQ301 ~ Q304D334, D

— 3 —LX0 LX1 LX2 LX3 LX4 LX5 LX6 LX7LY1 D4 D3 C3 C2 G#2 F#2 D#2 C#2LY2 C4 E3 B2 D2 A#2 C#3 D#3 F#3LY3 B3 F3 A2 E2 D#4 C#4 A#3 G#3LY4 A3 G3 G2 F2 C#5 A

— 4 —Pin No. Terminal In/Out Function1 MA14 — Not used.2 MWEB Out Clock for LED latches3 ~ 5 — — Not used.6 MA0 Out 7-seg. LED drive signal7 ~ 19 MA1

— 5 —LGLVDDCPULSI1MSM6755B-13LX0 ~ LX7LY1 ~ LY7Q1 ~ Q4Q5 ~ Q8Q2 ~ Q4La ~ Lg(Common)(Segment)MWEBLEDLatchIC37-segment LED Keyboard LEDsLEDLatch

— 6 —1243561 APO signalMSM6755B-13 pin 392 Reset signalRH5VL40AA pin 14 Sound signalJH connector pin 25 LED drive signal LX0MSM6755B-13 pin 883 Cl

— 7 —241356PRINTED CIRCUIT BOARDSSub PCB KDM445-MA2MTop viewMain PCB JCM446-MA1MBottom view Top viewGR0R55ER309R324VCJA355D329R354Q305C363R353R352R342