Casio SF-7900- Manuals

Page 2 - CONTENTS; CIRCUIT EXPLANATIONS

CONTENTS SPECIFICATIONS ................................................................................................................ 1 TO REPLACE THE BATTERY ............................................................................................. 2 TO CHECK THE MEMORY CAPACITY ................

Page 3 - SPECIFICATIONS; Operating temperature: 0

— 1 — SPECIFICATIONS Main modes: Telephone Directory, Business Card Library, Memo, Schedule Keeper,Expense, Reminder, Calendar, Home Time, World Time and Calculator Data storage: Storage and recall of telephone, business card, memo, schedule, expense,reminder data, calendar display, secret area; edi...

Page 4 - TO CHECK THE MEMORY CAPACITY; Total number of characters stored in memory; TO REPLACE THE BATTERY; To replace the batteries; Replace the battery holder and secure it by tightening its screw.; Screw; C A P A C I T Y

— 2 — Hold down CAPA to display a screen that shows the current memory status. To clear the memorystatus display, release CAPA . TO CHECK THE MEMORY CAPACITY Remaining memorycapacity Total number of characters stored in memory TO REPLACE THE BATTERY To replace the batteries 1. Loosen the screw on th...

Page 5 - ERROR MESSAGE

— 3 — Message Meaning Action DATA ITEM Search operation Current search operation NOT FOUND! attempted when no data cannot be performed. NO DATA is stored in memory. IN MEMORY! DATA ITEM Data specified in search Change specification or NOT FOUND! operation does not exist cancel search. in memory. MEM...

Page 6 - TO RESET THE SF UNIT'S MEMORY; To reset the SF Unit's memory

— 4 — RESET TO RESET THE SF UNIT'S MEMORY The following procedure erases all data stored in the memory of the SF unit.Perform the following operation only when you want to delete all data and initialize the settings of the SFunit.Remember – you should always keep copies of important data by writing ...

Page 7 - TO SAVE THE DATA TO ANOTHER UNIT

— 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 calculator mode. Operation: 1 DATE 2 DATE 3 DATE M+ If you don't set the date, the "PASSWORD" isn't transferred to the slave unit. TO SAVE THE DATA TO ANOTHER U...

Page 8 - DATA; RECEIVE OK; FUNCTION 4

— 6 — 5) Set up the slave unit. 1 While in the Calendar Display, Telephone Directory, Business Card Library, Memo Mode, orSchedule Keeper, press the FUNCTION key followed by 4 to select " DATA COMM", andthe following menu appears. 2 Press 2 to select "RECEIVE" and the following displ...

Page 9 - CONSULT THE

— 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 the data transmission, or press ESC if you wish tocancel. TEL MEMO REMINDER HOME/WORLD SCHEDULE Data are transmitted in the sequence of Telephone Director...

Page 10 - CPU; GATE ARRAY; LCD; BLOCK DIAGRAM; RAM

— 8 — LOCK (ON) C0~C63 CPU GATE ARRAY Power supply circuit LCD DRIVE VOLTAGES V1 ~ V5 DATA BUS S16~S95 S0~S15 LCD 96 × 64 dots INTERFACE FOR DATA TRANSMISSION & DATA RECEPTION OPEN (OFF) MSM6585AV -Z-358B LCD DRIVER LCD DRIVER MSM6585AV -Z-358B MAIN SWITCH BLOCK DIAGRAM CD760-TS PCB-L522-1 PCB-L...

Page 11 - System chart; The circuitry operates in the following order:; ROM; Gate array sends ROM output enable

— 9 — VIN VSS KAC KIO ADDRESS BUS 2 MHz VDD1 ON MAIN SWITCH SW GND VDD (Pin53) (Pin54) (Pin41) VDD "H" "H" ADDRESS DATA VDD "L" OSCO OSCI (Pin70) INT0 V2ON Gate array DATA BUS (Pin40) (Pin45) (Pin36) "L" (Pin24) System chart The circuitry operates in the following ord...

Page 12 - Power supply circuit; Power supply circuit for CPU, GATE ARRAY and RAMs.; When the voltage of the VDD lines becomes +6.6V

— 10 — Power supply circuit 1) Power supply circuit for CPU, GATE ARRAY and RAMs. When the main batteries are set, the voltage (9V) is applied to the terminal VDD1 of CPU (LSI1), GATE ARRAY (LSI2) and RAM (LSI4). When IC2 receives the voltage, it provides 4V to the GND lines from the terminal OUT (P...

Page 13 - Main switch and power on switch; nal for cutting the line of power on switch.; Power supply for LCD

— 11 — OFF ON SWO SW CPU MAIN SWITCH VDD "L" "L" KAC KIO (Pin36) (Pin62) (Pin54) (Pin53) 5) Main switch and power on switch When the main switch is set to on position, SW terminal of CPU receives "L", then KAC terminal will be "L" to enable the system power on. The KI...

Page 17 - DIAGNOSTIC OPERATION; MENU DISPLAY

— 15 — DIAGNOSTIC OPERATION 2. Display check MENU DISPLAY 1 : LCD ALIGNING2 : ALL DOTS ON3 : ALTERNATIVE4 : REVERSE5 : LCD FRAMING CASIO 1993. 11. 09 1. Diagnostic mode The diagnostic mode appears when main switch is turned onwhile there is a short in the checkpad. After this operation,the machine w...

Page 22 - TROUBLESHOOTING; SYMPTOM

— 20 — TROUBLESHOOTING Before the following solutions will be done, save data if possible. SYMPTOM CAUSE SOLUTION No power Battery shortage Replace batteries Poor soldering of the power supply Resolder circuit Defective LSI-1 or LSI-2 Replace it No display at all or wrong Defective TAB LSI Replace i...

Page 23 - SCHEMATIC DIAGRAM; Main PCB

Page 24 - Display PCB

Page 25 - Key Matrix

Page 27 - PARTS LIST

I : U.S.A. II : B.O.S.S. PARTS LIST III : OTHERS FOB Japan N Item Code No. Parts Name Specification Quantity M N.R.Yen R I II III Unit Price 1.MAIN BOARD LSI1 2011 3843 LSI HD62076C03 1 1 1 1 720 A LSI2 2011 7350 LSI SSC2571F0A 1 1 1 1 460 A N LSI3 2011 9247 IC TC551001BFL-10L 1 1 1 1 1,330 A N LSI5...

Page 29 - ASSEMBLY VIEW

— 27 — ASSEMBLY VIEW 26 35 4 10 8 9 7 6 44 12 31 46 21 40 24 25 23 38 42 35 37 41 20 19 14 15 32 VR1 3 J1 44 39 1 30 45 37 43 22 29 43 37 17 18 28 13 33 27 36 2 34 11 5 37 16 37