Olivetti ECR 7900 Service Manual page 4

3-8. DISPLAY INFORMATION............................................................................................... 32
3-9. KEYBOARD CIRCUIT .................................................................................................... 33
3-10. DRAWER CIRCUIT....................................................................................................... 34
3-11. BUZZER CIRCUIT ........................................................................................................ 35
3-12. BATTERY CIRCUIT ...................................................................................................... 36
3-13. EXTERNAL MEMORY.................................................................................................. 38
3-13-1. SRAM (BS62LV4006SCP-70)........................................................................... 38
3-13-2. FROM (S29AL004D70TFI010) ......................................................................... 40
3-14. PRINTER CIRCUIT....................................................................................................... 43
3-15. INTERFACE CIRCUIT .................................................................................................. 46
4. DIAGNOSTIC SOFTWARE.................................................................................. 48
4-1. DIAGNOSTIC CHECK & FINISHED GOODS CHECK................................................... 48
4-2. SOFTWARE VERSION CHECK ..................................................................................... 56
5. INSTALLING SOFTWARE ................................................................................... 58
5-1.USB driver install ........................................................................................................... 66
6. ASSEMBLY INSTRUCTION................................................................................. 73
6-1. TOP CASE UNIT ............................................................................................................ 73
6-2. Display unit ASSY ......................................................................................................... 80
6-3. Bottom case unit ASSY ................................................................................................ 83
8. CIRCUIT DIAGRAM ............................................................................................. 93
9. EXPLODED DIAGRAM...................................................................................... 101
II ECR 7900 Service Manual Y108540-8