SF-7900(LX-522)OCT. 1994R(with price)SF-7900

— 8 —LOCK (ON)C0~C63CPUGATE ARRAYPower supply circuitLCD DRIVE VOLTAGESV1 ~ V5DATA BUSS16~S95S0~S15LCD 96 × 64 dotsINTERFACE FORDATA TRANSMISSIO

— 9 —VINVSSKACKIOADDRESS BUS2 MHzVDD1ONMAIN SWITCHSWGNDVDD(Pin53)(Pin54)(Pin41)VDD"H""H"ADDRESSDATAVDD"L"OSCOOSCI(Pin70)

— 10 —Power supply circuit1) Power supply circuit for CPU, GATE ARRAY and RAMs.When the main batteries are set, the voltage (9V) is applied to the ter

— 11 —OFFONSWOSWCPUMAIN SWITCHVDD"L""L"KACKIO(Pin36)(Pin62)(Pin54)(Pin53)5) Main switch and power on switchWhen the main switch is

— 12 —Pin No. Name In/Out Status Status Descriptionof OFF of ON1~14,16,17 A0~A15 Out L Pulse Address Bus line15,39, 100 VSS In GND GND GND terminal24

— 13 —Pin No. Name In/Out Description1 VSS1 In GND terminal2 OSO Out Clock out3 OSI In Clock in4 VL1 In 6V input5~10 A0~3,A14,15 In Address input11 FE

— 14 —Pin No. Name In/Out Description57 MS2 Out Not used58 OEO Out Output enable for ROM59 BZ1 Out Buzzer signal60 OTP In Connected to GND61 BZ2 Out B

— 15 —DIAGNOSTIC OPERATION2. Display checkMENU DISPLAY1 : LCD ALIGNING2 : ALL DOTS ON3 : ALTERNATIVE4 : REVERSE5 : LCD FRAMINGCASIO 1993. 11. 091. D

— 16 —3. RAM checkDISP CHNG key :Return to menuDATA WRITE : Write the set pattern to the RAM areaDATA READ : Compare the pattern displayed after # wit

— 17 —4. ROM/Clock checkCHECK-SUM : Call up check sum and XORvalues for connected ROM.SPECIFIC ADDR : Call up check sum for certainaddress.TIME DISPLA

CONTENTSSPECIFICATIONS ... 1TO REPLACE TH

— 18 —Pressing of the SEARCH key in either mode will return to the screen of the menu mode.Sound can be stopped by pressing any key.While an alarm i

— 19 —TRANS BREAK!CASIO 1993. 11. 09TRANS ERROR!CASIO 1993. 11. 09LOOP BACKNOW EXECUTING!CASIO 1993. 11. 09LOOP BACKCOMPLETE!CASIO 1993. 11. 09Break d

— 20 —TROUBLESHOOTINGBefore the following solutions will be done, save data if possible.SYMPTOM CAUSE SOLUTIONNo power Battery shortage Replace batter

— 21 —SCHEMATIC DIAGRAMMain PCB

— 22 —Display PCB

— 23 —Key Matrix

— 24 —Key Matrix (Display side)

I : U.S.A.II : B.O.S.S.PARTS LISTIII : OTHERS FOB JapanN Item Code No. Parts Name Specification Quantity M N.R.Yen RI II III Unit Price1.MAIN BOA

I : U.S.A.II : B.O.S.S.III : OTHERS FOB JapanN Item Code No. Parts Name Specification Quantity M N.R.Yen RI II III Unit Price7 6512 1280 Haet sea

— 27 —ASSEMBLY VIEW2635410897644123146214024252338423537412019141532VR13J144391304537432229433717182813332736234115371637

— 1 —SPECIFICATIONSMain modes: Telephone Directory, Business Card Library, Memo, Schedule Keeper,Expense, Reminder, Calendar, Home Time, World Time an

MA1100741A

— 2 —Hold down CAPA to display a screen that shows the current memory status. To clear the memorystatus display, release CAPA .TO CHECK THE MEMOR

— 3 —Message Meaning ActionDATA ITEM Search operation Current search operationNOT FOUND! attempted when no data cannot be performed.NO DATA is stored

— 4 —RESETTO RESET THE SF UNIT'S MEMORYThe following procedure erases all data stored in the memory of the SF unit.Perform the following operatio

— 5 —2) Turn on the power switch of both units.3) The slave unit must be set the date of Feb. 3rd, 1901 into the memory under the calculatormode.Ope

— 6 —5) Set up the slave unit.1 While in the Calendar Display, Telephone Directory, Business Card Library, Memo Mode, orSchedule Keeper, press the FU

— 7 —3 Press 3 to select "ALL DATA". The following display appears to confirm if you wish toproceed.4 Press the SET key to proceed with