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Casio LX-547, Service Manual & Parts List, Page: 2 / 27

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CONTENTS

1. SCHEMATIC DIAGRAM

1-1. MAIN PCB .................................................................................................................. 1

1-2. KEY MATRIX 1 .......................................................................................................... 2

1-3. KEY MATRIX 2 .......................................................................................................... 3

2. SPECIFICATIONS ............................................................................................................ 5

3. REPLACING THE BATTERIES ........................................................................................ 6

4. RESETTING THE UNIT .................................................................................................... 7

5. SAVING DATA .................................................................................................................. 8

6. LSI PIN FUNCTIONS

6-1. CPU:LSI1 ................................................................................................................. 12

6-2. RAM:LSI2 AND LSI3 (CXK58257) .......................................................................... 13

6-3. VOLTAGE REGULATOR:REG1 (S-81253) ............................................................ 14

6-4. VOLTAGE DETECTOR:DET1 (RH5VL46CA) ........................................................ 14

7. TROUBLESHOOTING .................................................................................................... 15

8. DIAGNOSTICS ................................................................................................................ 18

9. ASSEMBLY VIEW .......................................................................................................... 23

10. PARTS LIST .................................................................................................................... 25

Summary of Contents for LX-547

Page 1: ...R SF 5300B LX 547 SEP 1994 SF 5300B with price...

Page 2: ...IONS 5 3 REPLACING THE BATTERIES 6 4 RESETTING THE UNIT 7 5 SAVING DATA 8 6 LSI PIN FUNCTIONS 6 1 CPU LSI1 12 6 2 RAM LSI2 AND LSI3 CXK58257 13 6 3 VOLTAGE REGULATOR REG1 S 81253 14 6 4 VOLTAGE DETECT...

Page 3: ...1 1 SCHEMATIC DIAGRAM 1 1 MAIN PCB...

Page 4: ...2 1 2 KEY MATRIX 1...

Page 5: ...18 CODE 13 CODE 12 CODE 19 CODE 20 CODE 14 CODE 09 CODE 08 CODE 15 CODE 10 CODE 05 CODE 04 CODE 11 CODE 06 CODE 00 CODE 07 CODE 01 CODE 03 CODE 02 KY1 KY2 KY3 KY4 KY5 KY6 KY7 KY8 KY1 KY2 KY3 KY4 KY5...

Page 6: ...uous operation in Telephone Directory Approximately 350 hours repeating one minute of input and 10 minutes of display in Telephone Directory Approximately 12 months for memory backup Auto power off Ap...

Page 7: ...old battery with a new one Be sure that the positive side of the new battery is facing up so you can see it 4 Replace the battery holder and secure it by tightening its screw Be careful that you do no...

Page 8: ...to abort the reset operation without deleting anything Following the reset operation described above the Home Time display appears and the SF 5300B settings are initialized as noted below ALL DATA CLE...

Page 9: ...the receiving unit 1 Do the reset operation 2 Enter the calculator mode Set the date of receiving unit to February 3rd 1901 Operation Note The customer may have created a password to protect confident...

Page 10: ...ess to select RECEIVE If the password isn t registered in the SF 5300B the display shows X instead of 1 CAPS 1 TO SECRET AREA 2 ALL DELETE 3 LABEL EDIT 4 DATA COMM 1 SEND 2 RECEIVE 3 SET UP PAR CAPS D...

Page 11: ...COMM 4 Press to select SET UP 5 Use or to select N 7 and 9600 and press If the password isn t registered in the SF 5300B the display shows X instead of 1 FUNC 1 TO SECRET AREA 2 ALL DELETE 3 LABEL EDI...

Page 12: ...error occurs during data transmission the message TRANSMIT ERROR appears on the display Press to clear the error message 9 After data transmission is complete the display returns to the initial screen...

Page 13: ...ed 13 WEB Out Write enable signal for LSI2 and LSI3 14 15 RA15 16 Out Address bus Not used 16 30 A0 14 Out Address bus 31 38 IO0 7 I O Data bus 39 54 KY0 15 I O Key signal 55 SW In Battery switch Powe...

Page 14: ...3 3 99 Minimum 2 71 Maximum V V4 4 64 Minimum 3 99 Maximum V 68 NC Not used 72 INTO In Low battery detection INTO 5 2 V No power on 73 STNT GND 0 V 74 VLCD In Power supply terminal 5 3 V S0 95 Out Seg...

Page 15: ...EG1 S 81253 Output Voltage VDD 5 3 V 5 6 4 VOLTAGE DETECTOR DET1 RH5VL46CA 1 GND 2 VCC 3 VDD VDD GND VCC VREF RA RB 1 2 3 RI 3 GND 1 OUT 2 VCC 1 2 3 VCC OUT GND Input Voltage VCC Output Voltage OUT VC...

Page 16: ...place C8 C9 C10 C11 C12 or C13 Adjust the display contrast Replace the batteries Check another function Does the display appear by pressing the reset button Refer to No Erratic Display Do the batterie...

Page 17: ...soldering of LSI1 poor N Replace LSI1 Y START Is Pin 1 of DET1 5 2 V Replace DET1 Replace LSI1 Replace LSI1 Resolder Is Pin 11 of LSI1 sending the signal Replace LSI1 LSI2 or LSI3 1 Does the rubber ke...

Page 18: ...2 5 V V3 2 7 V V4 3 9 V Is the soldering of LSI1 poor N Replace LSI1 Y Resolder High current consumption START Y N Are the capacitors C8 C9 C11 C12 and C13 OK N Y Is there any short circuit on the PCB...

Page 19: ...ing illustration are covered by a blind label 3 To exit the diagnostic mode press the reset button To enter the diagnostic mode 1 Slide the battery switch to the up position 2 Press while shorting the...

Page 20: ...turn to the TEST MENU press Press 1 on the TEST MENU Display Check 1 ESC 2 3 4 5 DISP 4 RVS 1 WHITE 5 FRAME 2 BLACK 6 DOT4 3 CHECK 7 TIME Frame display All dots displayed Checker displayed Reverse che...

Page 21: ...e write data WRITE1 of the RAM and displays the results 3 Writes the test pattern in the ROM to the RAM area Test pattern Decremental order FF FE and so on 4 Compares the test pattern with the write d...

Page 22: ...00 7FFF check LSI3 If the displayed address is within 8000 FFFF check LSI2 Operation Display Note MEMORY 3 WR2 4 READ2 1 WR1 5 DUMP 2 READ1 6 CHKSUM ESC ESC 2 Key Check Each key has its own key code T...

Page 23: ...NU 3 KEY 4 BUZZER 1 DISP 5 EXT SEARCH BUZZER 1 BEEP 2 ALARM1 3 ALARM2 Buzzer check To return to the TEST MENU press Check the sound To return to the BUZZER menu press any key Press 4 on the TEST MENU...

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

Page 25: ...82 1 20 2 C R6 2797 0637 Chip resistor ERJ 6GEYJ473 1 20 2 C R7 2797 1309 Chip resistor ERJ 6GEYJ102 1 20 3 C R8 9 2797 1078 Chip resistor ERJ 6GEYJ101 2 20 3 C N R20 2797 3752 Chip resistor ERJ 6GEYJ...

Page 26: ...lind tape HGJ00008104 1 20 7 X N 31 6412 3070 Lower case KB FABDB221005 1 5 82 X N 31 6412 3080 Lower case KB for B O S S FABDB221013 1 5 82 X 32 6511 8400 Key rubber for reset LADB0220105 1 20 10 B 3...

Page 27: ...MA1100741A...

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