Casio CTK-631 Service Manual
Also see for CTK-631: User guideUser guide
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— 3 —BLOCK DIAGRAMKC0 ~ KC7FI0 ~ FI9SI0 ~ SI9KI0 ~ KI2PB0 ~ PB3P10, P13P14, P17Working StorageRAM (256K-bit)LSI4TC55257DFL-70L(EL)MIDIEA0 ~EA14EIO0 ~EIO7Sound Source ROM(24M-bit)LSI3LH536PY8WCKOSOBCKD/A ConverterIC1UPD6379GRFilterQ308 ~ Q311MainVolumePower AmplifierIC301TA8248KKeyboardMA0 ~ MA19Effect RAM(256K-bit)LSI5TC55257DFL-70L(EL)MD0~MD7SpeakersOutputMA0~MA14MA0, MA1 LRCK, SOBCK, SINKLCDLCD DriverLSI501SED1278F2ASEG1 ~ SEG40INOUTReset ICIC2RN5VD40AARESETCOM1 ~ COM16DSPLSI2HG51B277FB-1MD0 ~ MD15CPULSI1GT913F(T)ButtonsAssingnable JackPB4VDDPower SwitchNMIFI10P23PA0 ~ PA5PB0 ~ PB3 |
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