(with price) SF-7900(LX-522) OCT.
CONTENTS SPECIFICATIONS ................................................................................................................ 1 TO REPLACE THE BATTERY ............................................................................................. 2 TO CHECK THE MEMORY CAPACITY ............................................................................... 2 ERROR MESSAGE ...............................................................................................................
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; editing; memory status display Clock: World Time; reminder alarm; schedule alarm; daily alarm; accuracy under normal temperatures: ±3 seconds average Calculation: 12-digit arithmetic calculations; arithemetic con
TO REPLACE THE BATTERY To replace the batteries 1. Loosen the screw on the back of the SF unit that holds the battery compartment cover in place, and remove the cover. Caution In the next step, be sure to remove only one battery at a time. Otherwise, you will lose all data stored in memory. 2. Loosen the screw that secures one of the three battery holders in place and remove the battery holder. 3.
ERROR MESSAGE Message Meaning Action DATA ITEM NOT FOUND! NO DATA IN MEMORY! Search operation attempted when no data is stored in memory. Current search operation cannot be performed. DATA ITEM NOT FOUND! Data specified in search operation does not exist in memory. Change specification or cancel search. MEMORY FULL! No more room in memory Delete unnecessary data for storage of data. items from memory.
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 SF unit. Remember – you should always keep copies of important data by writing it down, by transferring it to a personal computer or other SF unit. To reset the SF Unit's memory RESET button RESET 1. Switch on power and press the RESET button with a thin, pointed object.
TO SAVE THE DATA TO ANOTHER UNIT SF-7900 can transfer customers data to another SF-7900 with memory protection only when replacing the LCD or the outer case. How to transfer the data * Before connecting the cable (SB-60 or SB-62), be sure to reset the slave unit to clear all data. 1) Turn off the power switch and connect the two units using the cable (SB-60 or SB-62) as shown in the drawing. 2) Turn on the power switch of both units. 3) The slave unit must be set the date of Feb.
5) Set up the slave unit. 1 While in the Calendar Display, Telephone Directory, Business Card Library, Memo Mode, or Schedule Keeper, press the FUNCTION key followed by 4 to select " DATA COMM", and the following menu appears. TEL FUNCTION 1 SEND 4 2 RECEIVE 3 PRINT 4 SET UP 2 Press 2 to select "RECEIVE" and the following display appears to indicate that the slave unit is ready to receive data. 2 DATA RECEIVE OK TO STOP PRESS [ESC] 6) Set up the customer's unit.
3 Press 3 to select "ALL DATA". The following display appears to confirm if you wish to proceed. SEND ALL 3 DATA ITEM ? SET / ESC 4 Press the SET key to proceed with the data transmission, or press ESC if you wish to cancel. NOW SENDING ! SET TO STOP, PRESS ESC Data are transmitted in the sequence of Telephone Directory data, Memo data, Reminder data, Schedule Keeper data and Calendar data.
BLOCK DIAGRAM LCD 96 × 64 dots CD760-TS S16~S95 S0~S15 C0~C63 KEYBOARD PCB-L589-E4 LCD DRIVER LCD DRIVER MSM6585AV -Z-358B MSM6585AV -Z-358B PCB-L589-E2 DATA BUS TO KEYBOARD LCD DRIVE VOLTAGES V1 ~ V5 CPU HD62076C03 LSI1 VDD OPEN (OFF) LOCK (ON) ROM MAIN SWITCH (Operation Program) GND LSI5 Power supply circuit RAM MSM51008AFP-10LL LSI3 GATE ARRAY SSC2571F0A LSI2 INTERFACE FOR DATA TRANSMISSION & DATA RECEPTION —8— PCB-L522-1
CIRCUIT EXPLANATIONS System chart The circuitry operates in the following order: VDD 1 VDD 11 Low battery detector VSS circuit 10 Gate array SSC2571F0A Power supply IC4 (Pin24) V1~V5 for LCD VOB VIN PDN SWO OEO (Pin35) (Pin62) MSO (Pin28) (Pin49) (Pin58) 3 2 12 13 "L" "L" "L" "L" "H" VDD 2 MHz 9 (Pin45) 8 (Pin41) V2ON OSCI (Pin40) OSCO VDD1 VDD (Pin70) INT0 OFF CPU GND MAIN SWITCH SW HD62076C03 (Pin36) 5 "L" 4 ON (Pin24) OE GND ROM KIO KAC (Pin54) (Pin53)
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 (Pin No.1). 2) Main switch The CPU (LSI1) detects the informations of the Main switch by the terminal SW (Pin No.36) from the SWO signal of the GATE ARRAY (LSI2). 3) How to turn the display ON.
5) Main switch and power on switch from IC4 VDD (Pin35) MAIN SWITCH OFF (Pin36) SW PDN "L" ON (Pin62) CPU "L" GATE ARRAY SWO SSC2571F0A OSCI HD62076C03 KON 2 MHz (Pin26) OSCO KAC (Pin54) KIO (Pin53) 4S66F "H" "L" 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 KI0 terminal is "H" when VDD is applied to CPU.
CPU pin description (HD62076C03) Pin No.
Gate array pin descriptions (SSC2571F0A) Pin No.
Pin No. Name In/Out Description 57 MS2 Out Not used 58 OEO Out Output enable for ROM 59 BZ1 Out Buzzer signal 60 OTP In Connected to GND 61 BZ2 Out Buzzer signal 62 SWO Out Main switch control signal 63 VH4(VCC) In 9V input 64 TXO Out Transmission data output terminal Operation program ROM pin descriptions Pin No.
DIAGNOSTIC OPERATION Main switch Check pad SELF TEST PROG. PRESS SET 1. Diagnostic mode The diagnostic mode appears when main switch is turned on while there is a short in the checkpad. After this operation, the machine will beep and display "SELF-TEST". QUIT BY OFF CASIO 1993. 11. 09 MENU 1 : 2 : 3 : 4 : 5 : TOP SHEET DISP CHECK RAM TEST MEMORY TEST KEY / BUZZER INTERFACE CASIO 1993. 11. 09 The menu appears after pressing SET key. Tests are conducted by selecting the mode from the list on screen.
3. RAM check DISP CHNG key MENU 1 : 2 : 3 : 4 : 5 : RAM DATE WRITE DATA READ PAT. CHANGE #1 DATA WRITE DATA READ PAT. CHANGE :Return to menu : Write the set pattern to the RAM area : Compare the pattern displayed after # with the write data of RAM and displays the results. : Change the test data pattern. CASIO 1993. 11. 09 #1---Test data pattern(00,01,02...) #2---Test data pattern(FF,FE,FD....) 1) RAM write The unit will beep after a second. The menu will be appeared.
4. ROM/Clock check MENU 1 : 2 : 3 : 4 : 5 : CHECK-SUM : Call up check sum and XOR values for connected ROM. SPECIFIC ADDR : Call up check sum for certain address. TIME DISPLAY : Bring up clock display. The present time, date and daily alarm can be set. MEMORY CHECK–SUM SPECIFIC ADDR TIME DISPLAY CASIO 1993. 11. 09 1) Check sum 3) Time display CHECKSUM CALC TP C0 O SZ 256 TIME DISPLAY SUM XXXX XOR XX 1990-03-00 10:10 00 XXXXXXXXXXXXXXX CASIO 1993. 11. 09 CASIO 1993. 11.
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 is sounding the screen display is as shown left. If an irregularity is found in voltage of battery while the alarm is sounding, the alarm will stop. After 256 seconds, the alarm will stop automatically. 6. Interface check The three charactors that appear on the right side at display represent the parameter.
LOOP BACK LOOP BACK NOW EXECUTING! COMPLETE! CASIO 1993. 11. 09 CASIO 1993. 11. 09 Break display (Broken transmission) Error display TRANS BREAK! TRANS ERROR! CASIO 1993. 11. 09 CASIO 1993. 11. 09 7. Others 1) When power is off after presetting an alarm time, the unit automatically powered on at the alarm time. However, the display is not reserved in this case. 2) When executing memory sum check, execute the RAM write check before. 3) To release diagnostic mode, press RESET button.
TROUBLESHOOTING Before the following solutions will be done, save data if possible.
SCHEMATIC DIAGRAM Main PCB — 21 —
Display PCB — 22 —
Key Matrix — 23 —
Key Matrix (Display side) — 24 —
PARTS LIST N N N N N N Item LSI1 LSI2 LSI3 LSI5 IC2 IC3 IC4 IC6 Q1 Q2 Q4 D1 D2 D3 X1 X2 C1 C4 C5 C6/7 C8/9 C10/11 CB1~5/7 C20 R1/2 R3/22 R6/7 R10 R12 R13/31 R14~18 R19 R23 R26/28 J1 VR1 1 2 3 LSI6/7 4 N 5 6 Code No. Parts Name Specification I : U.S.A. II : B.O.S.S. III : OTHERS FOB Japan Quantity M N.R.Yen R I II III Unit Price 1.
N N N N N N N N N N N N N N N N N N Item Code No.
ASSEMBLY VIEW 37 41 37 26 16 33 20 34 35 19 37 28 27 4 13 6 14 17 18 10 44 44 8 39 15 J1 32 9 12 VR1 7 3 2 42 11 31 35 30 5 1 23 38 46 45 25 37 24 21 43 37 36 43 22 40 29 — 27 —
MA1100741A
