Specifications

CONTENTS
1. SCHEMATIC DIAGRAM................................................................................................ 1
2. SPECIFICATIONS ......................................................................................................... 5
3. TO REPLACE THE BATTERY...................................................................................... 6
4. ERROR MESSAGE ....................................................................................................... 7
5. TO RESET THE DIGITAL DIARY ................................................................................. 7
6. TO SAVE THE DATA TO OTHER MACHINE............................................................... 8
7. TO CHECK THE MEMORY CAPACITY...................................................................... 11
8. DISASSEMBLY ........................................................................................................... 12
9. BLOCK DIAGRAM ...................................................................................................... 14
10. CIRCUIT EXPLANATIONS
10-1. System chart................................................................................................. 15
10-2. Power supply circuit .................................................................................... 16
10-3. Battery voltage detection ............................................................................ 19
10-4. CPU pin description (
µPD3055GF002-2BA) ............................................... 21
10-5. Gate array pin descriptions (
µPD65005G-452-22) ..................................... 21
10-6. Power supply chip IC pin descriptions (SC371015FU) ............................. 21
10-7. Character generator ROM pin descriptions (HD62063B01) ..................... 22
10-8. Operation program ROM pin descriptions (
µPD23C2001EGW342)......... 23
10-9. RAM pin descriptions (
µPD43256AGU-10/12/15LL) .................................. 23
11. DIAGNOSTIC OPERATION ........................................................................................ 24
12. TROUBLE SHOOTING................................................................................................ 29
13. PARTS LIST ................................................................................................................ 32
14. PCB VIEW ................................................................................................................... 34
15. ASSEMBLY VIEW ....................................................................................................... 35