Casio CTK-691 User Manual

ELECTRONIC KEYBOARDCTK-691CTK-691JUN. 2003Ver.2 : Sep. 2006INDEX

— 8 —DISASSEMBLY1. Remove the battery cover and then the battery.2. Remove 27 screws and then the upper case.3. Remove 5 screws, 4 speaker cords, 2 ba

— 9 —4. Remove 4 screws, 6 connectors (JA, JB, JC, JD, JE, JF) and then the PCB ASS'Y (MA1M).5. Remove 6 screws and then the LCD ASS'Y (LCD1

— 10 —Screws6. Remove 3 screws, connector (JL), and then the PCB ASS'Y (CN3M).Connector7. Remove 2 screws, the volume knob, and then the PCB ASS&

— 11 —Note: Fix the LED (D301, D302, D303, D304, D305, D306, D307) to the PCB according to the height as shown inthe figure below while paying attenti

— 12 —10.Remove 19 screws and then the PCB ASSY (KY1M, KY2M).11.Remove the rubber keys.Note: Pay attention to the positions of the rubber keys as one

— 13 —12.Remove 21 screws and then the white keys.13.Remove the black keys.Note: Pay attention to the positions of the screw holes whenreassembling.

— 14 —ORHYTHMPDRAWBAR ORGANQDSPRPIANO SETTINGSCursor key UpTCursor key RightUCursor key DownVCursor key LeftWEXITXAUTO HARMONIZEYSPLITZLAYER Initial S

— 15 —2. AC adaptor detection check.1 Press “TONE” button.2When the instrument detects that an AC adaptor is plugged in, an OK soundsounds. “ACJ OFF”

— 16 —= Rest of above characters turn on.A Press “REGISTRATION 4” button.B Each characters turn in order.There no lack of dots and characters12. TUNE

— 17 —SCHEMATIC DIAGRAMSMain PCB M705-MA1M

CONTENTSPageSpecifications ...

— 18 —Sub PCB M705-MA2M

— 19 —CONSOLE PCBs M705-CN1M/CN2M/CN3M/CN4M

— 20 —Display PCB M705-LCD1M

— 21 —Keyboard PCBs JCM618T-KY1M/KY2M

— 22 —EXPLODED VIEW3717383825182019 33343532262128232224273116315813143972154R-2R-3163029R-13661112910

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

— 24 —N Item Code No. Part Name Specification QPriceCodeR RemarkMain PCBN 1 10123432 PCB ASSY/MA1M TK-RJM502974*001 1 DL AN IC1 10122996 IC TC74HCT08A

— 25 —N Item Code No. Part Name Specification QPriceCodeR RemarkLCD PCBN 6 10123434 PCB ASSY/LCD1M TK-RJM502998*001 1 BE CIC501 10006502 LSI ML9040-B0

Ver.1 : Dec. 2005Replacement of the PARTS LIST (P25)Ver.2 : Sep. 2006Replacement of the PARTS LIST (P25)CASIO COMPUTER CO.,LTD.Overseas Service Divisi

— 1 —SPECIFICATIONSGENERALKeyboard: 61 standard-size keys, 5 octaves with touch response (Off / 1 / 2 / 3)Tones: 300 Advanced Tones + 200 Preset Tones

— 2 —Other FunctionsTranspose: 49 steps (–24 semitones to +24 semitones)Tuning: Variable (A4 = approximately 440Hz ±100 cents)LCD: Adjustable contrast

— 3 —BLOCK DIAGRAMMIDIRAM (1Mbit)IC2CY62128VLL-70AZIPEDALAssingnable JackReset ICIC4R1151N001C-TRRESET16.384MHzEA0 ~ EA19ED12 ~ ED19MA0 ~ MA20MD0 ~ MD

— 4 —CIRCUIT DESCRIPTIONKEY MATRIXBUTTON MATRIXKC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7-C2 (1) C#2(1) D2 (1) D#2 (1) E2 (1) F2 (1) F#2 (1) G2 (1)C2 (2) C#2 (2)

— 5 —PRINTED CIRCUIT BOARDSMain PCB M705-MA1MTop ViewBottom View

— 6 —Sub PCB M705-MA2MLCD PCB M705-LCD1MTop ViewTop View

— 7 —CONSOLE PCB M705-CN2MTop ViewCONSOLE PCB M705-CN1MTop ViewCONSOLE PCB M705-CN4MCONSOLE PCB M705-CN3MTop ViewTop View