Casio LX-551AQ, Руководство по обслуживанию и список запасных частей

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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
2-1. General ...................................................................................................................5
2-2. Function .................................................................................................................5
2-3. Storage Capacitiy ..................................................................................................9
3. GENERAL GUIDE
3-1. Outward ................................................................................................................10
3-2. About data errors ................................................................................................10
3-3. About the memory overflow message ............................................................... 10
3-4. Mesage Table .......................................................................................................11
3-5. To adjust the display contrast ............................................................................ 11
3-6. To select a mode .................................................................................................12
3-7. To check the memory status .............................................................................. 12
3-8. To use the FUNCTION key .................................................................................. 12
3-9. To switch the key input and alarm tones on and off ........................................ 13
3-10. To select the system language .......................................................................... 13
4. REPLACING THE BATTERIES ................................................................................... 14
5. RESETTING THE UNIT ................................................................................................15
6. SAVING DATA .............................................................................................................16
7. LSI PIN FUNCTIONS
7-1. CPU:LSI1 ..............................................................................................................20
7-2. RAM:LSI2 AND LSI3 (CXK58257) ....................................................................... 21
7-3. ROM:LSI4 (
µ
PD23C1001EAGZ) .......................................................................... 22
7-4. VOLTAGE REGULATOR:REG1 (S-81253) ......................................................... 23
7-5. VOLTAGE DETECTOR:DET1 (RH5VL46CA) ...................................................... 23
8. TROUBLESHOOTING .................................................................................................24
9. DIAGNOSTICS .............................................................................................................27
10. ASSEMBLY VIEW ........................................................................................................33
11. PARTS LIST .................................................................................................................35