Casio CTK-620L Service Manual
Also see for CTK-620L: User guideUser guide
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— 3 —BLOCK DIAGRAMKC0 ~ KC7FI0 ~ FI7SI0 ~ SI7KI0 ~ KI2MD0 ~ 3L0~ L20L21~ L23MA0 ~ 2PO10, PO17PO22, PO23PA4 ~ PA6Working StorageRAM (256K-bit)LSI4TC55257DFL-70L(EL)MIDIEA0 ~EA14EIO0 ~EIO7Sound Source ROM(24M-bit)LSI3LH536PNVLRCKSOBCKD/A ConverterLSI6UPD6379GR-E1FilterQ213 ~ Q216MainVolumePower AmplifierIC201TA8229KKeyboardLEDIlluminantMA0 ~ MA19MCSB0MCSB0, 1MA19Power Supply CircuitQ201 ~ Q208,D206 ~ 208, D210VCC AVDD VDD VCDVDD VLCCLVDDLCDDAPOL OUTR OUTEffect RAM(256K-bit)LSI5TC55257DFL-70L(EL)MD0~MD7Speakers(L)(R)Phones/OutputMA0~MA14MA0,MA1 LRCK, SOBCK, SINKLCDLCD DriverLSI401SED1278F0ASEG1 ~ SEG40INOUTReset IC IC1RN5VD40AAChip SelectorIC2,3RESETCOM1 ~ COM16DSPLSI2HG51B277FB-1MD0 ~ MD15ButtonsAssingnable JackPB4VDDPower SwitchNMILCBEFI9FI10PA0, PA1PB0 ~ PB3LEDDriverQ1 ~ Q11LEDDriverQ12 ~ Q14CPULSI1GT913F(T)GALSI7UPD65005GF-419ECEBCE1BRACEBRDCEB |
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