Casio SF-4300B Service Manual & Parts List
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Casio SF-4300B Service Manual & Parts List

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SF-4300B
(LX-588)
MAR. 1994
SF-4300B
R

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Summary of Contents for Casio SF-4300B

  • Page 1 (with price) SF-4300B (LX-588) MAR. 1994 SF-4300B...

  • Page 2: Table Of Contents

    CONTENTS SCHEMATIC DIAGRAM ....................1 1-1. MAIN PCB ........................1 1-2. KEY MATRIX ......................2 SPECIFICATIONS ......................3 TO REPLACE THE BATTERIES..................5 DATA TRANSFER ......................6 OPERATION REFERENCE ..................... 10 5-1. RESET OPERATION ....................10 5-2. TO ADJUST THE DISPLAY CONTRAST ............... 11 5-3.

  • Page 3: Schematic Diagram

    SCHEMATIC DIAGRAM 1-1. MAIN PCB — 1 —...

  • Page 4: Key Matrix

    1-2. KEY MATRIX — 2 —...

  • Page 5: Specifications

    SPECIFICATIONS Data storage: Storage and recall of telephone, memo, schedule, 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: 10-digit arithmetic calculations; arithmetic constants (+, –, ×, ÷); independent memory; percentages; square roots;...
  • Page 6 Memo: Approximately 1290, 20-character memos Schedule Keeper: Approximately 890, under the following conditions: 1 item per day, 20 characters per item 30 days per month Starting time specified, alarm time set Approximately 1020, under the following conditions: 1 item per day, 20 characters per item 30 days per month Starting time specified, no alarm time Reminder:...

  • Page 7: To Replace The Batteries

    TO REPLACE THE BATTERIES Screw 1) Loosen the screw on the back of the SF-4300B that holds the battery compartment cover in place, and remove the cover. Loosen the screw that secures one of the two battery RESET holders in place and remove the battery holder.

  • Page 8: Data Transfer

    DATA TRANSFER SF-4300B can transfer customers data to other SF-4300B with memory protection only when replacing the LCD or the outer case. How to transfer the data. * Before connecting the cable (SB-60/62), be sure to reset the slave machine to clear all data.
  • Page 9 SF Units or between an SF Unit and a personal computer. In addition to hardware connections, it details how to set up the communications parameters and how to set up the SF-4300B to receive data. By following these instructions carefully, you can be ensured of successful communications every time.
  • Page 10 If the units have another condition, reset as above. • To change the parameters Use the and — cursor keys to change the selected parameter on the display. Use the cursor keys to change the high-lighted setting of the currently selected parameter.
  • Page 11 Press 4 to select DATA COMM. SEND RECEIVE SET UP CAPS Press 1 to select SEND. ONE ITEM MODE DATA ALL DATA - SEND - CAPS Press 3 to select ALL DATA. SEND ALL DATA? SET/ESC CAPS Press SET to start the send operation or ESC to abort the operation without sending anything. SET or ESC SENDING DATA...

  • Page 12: Operation Reference

    OPERATION REFERENCE 5-1. RESET OPERATION 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.

  • Page 13: To Adjust The Display Contrast

    Schedule alarm → ON Sound: Reminder Alarm → ON Daily alarm → OFF Key → ON Character input: CAPS 5-2. TO ADJUST THE DISPLAY CONTRAST 1 Enter the Telephone Directory Mode. • You could enter any mode except the Calculator mode here. 2 Press SHIFT and confirm that the "S"...

  • Page 14: Lsi, Ic (Pin Function)

    LSI, IC (Pin function) 6-1. CPU No.1 Pin No. Signal Function 1 ~ 5 C0 ~ 4 Common Signal for display GND /0[V] BZ1,2 Buzzer terminal Power supply/5.3[V] CSRA1 Chip enable signal (Not used) CSRA2 Chip enable signal for RAM CSROM Chip enable signal (Not used) Write enable signal for RAM...

  • Page 15: Ram: Μ Pd43256G-101215Ll (Lsi3)

    Pin No. Signal Function 64,65 OSC I/O Clock terminal (DT-26S) 67,69~71 V1 ~ 4 Voltage for LCD driver OFF: 0[V] 0.64(Light) ~ 1.29(Dark)[V] 1.29 ~ 2.56 3.99 ~ 2.71 4.64 ~ 3.99 Not used INTO Low battery detection INTO<5.2[V]=> No power on STNT GND/0[V] VLCD...

  • Page 16: Voltage Regulator:s-81253Sgup (Reg1)

    6-3. VOLTAGE REGULATOR: S-81253SGUP (REG1) Output Voltage (Vout) : 5.3V ± 5% – Vout 6-4. VOLTAGE DETECTOR: S-80752AN (DET1) ) : 5.2V ± 2.5% Detection Voltage(–V [5.07V (MIN) ~ 5.33V (MAX)] Vout Input voltage Output voltage –V >5.2V <5.2V — —...

  • Page 17: Troubleshooting

    TROUBLESHOOTING < No power on > Adjust contrast Is contrast adjustment OK? Replace batteries Is power of batteries enough? Does display appear by pressing Check other function Reset button? Does it sound by key enter? Refer to <No/Erratic display> Adjust contact and clean battery Do batteries make positive contact spring with the battery springs?
  • Page 18 Replace DET1 Is 1-Pin of S-80752AN (DET 1) 5[V]? Is 11-Pin of CPU (LSI 1) sending the Replace CPU (LSI1) signal? Is 13-Pin of CPU (LSI1) sending Replace CPU (LSI1) the signal? Does RAM make positive contact with Resolder RAM (LSI3) PCB? Replace RAM (LSI3) or CPU (LSI1) <...
  • Page 19 < No/Erratic display > Is input 2-Pin of S-81253 (REG1) 6[V]? Check batteries Is output 3-Pin of S-81253 (REG1) Replace REG1 5.3[V]? Are voltage of several capacitors enough? V1: 1.3 [V] Check solder part of C6, C7, C8, V2: 2.5 [V] C9, C10 or replace.

  • Page 20: Hard Check

    SELF TEST PROG. The short pad is lo- Turn on while short the short pad PRESS SEARCH cated behind the (KEY61). tape I. QUIT BY OFF CASIO AUG. 1993 TEST 2 MEMORY Main menu SEARCH MENU 3 KEY 4 BUZZER...
  • Page 21 OPERATION DISPLAY NOTE FRAME Dots appear at 4 corners. TIME DISPLAY Check if timer is working. 00:00:00 TEST 2 MEMORY MENU 3 KEY 4 BUZZER 1 DISP 5 EXT 1 RANDOM Key check 2 AUTO No display • Check the key No....
  • Page 22 OPERATION DISPLAY NOTE SEARCH TEST 2 MEMORY MENU 3 KEY 4 BUZZER 1 DISP 5 EXT BUZZER 1 BEEP Buzzer check 2 ALARM1 3 ALARM2 Check the alarm 1 EXECUTING!! sound. BUZZER 1 BEEP 2 ALARM1 3 ALARM2 TEST 2 MEMORY MENU 3 KEY 4 BUZZER...
  • Page 23 OPERATION DISPLAY NOTE (After few seconds) MEMORY 3 WR2 4 READ2 1 WR1 5 DUMP 2 READ1 6 CHKSUM EXECUTING Check sound. COMPLETE If RAM has defect, 32KB error message will be appeared. TEST 2 MEMORY MENU 3 KEY 4 BUZZER 1 DISP 5 EXT Press "RESET"...
  • Page 24 — 23 —...

  • Page 25: Assembly View

    PARTS LIST FOB Japan Item Code No. Parts Name Specification N.R.Yen Unit Price LSI1 6409 2760 COB LSI C312133*1 1,010 LSI3 2011 2849 LSI (RAM) uPD43256AGU-1012LL 2259 0959 Chip digital transistor DTC114YKT-146 1 20 DET1 2105 3297 CMOS IC S-80752AN-JG-T1 1 10 REG1 2105 3290 Regulator...
  • Page 26 FOB Japan Item Code No. Parts Name Specification N.R.Yen Unit Price 6512 0980 Screw MAB20086306 8 20 6409 6240 Hard case FC1DB20001 6409 6250 Label HGG00012603 Notes: N – New parts R – A : Essential M – Minimum order/supply quantity B : Stock recommended R –...
  • Page 27 MA0600741A...

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Lx-588Lx-558

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