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CONTENTS
Page
1.FEATURES ...................................................................................1
2.SPECIFICATIONS ...................................................................................1
3.OPTION ...................................................................................2
4.MAC OPERATION ...................................................................................2
5.BLOCK DIAGRAM ...................................................................................3
6.CIRCUIT EXPLANATIONS.............................................................................4
6-1. Power supply circuit .................................................................................4
6-2. Reset circuit ...................................................................................5
6-3. Data communication between CPU and EEPROM .................................6
6-4. Printer drive circuit ...................................................................................8
6-5. Pin description ...................................................................................9
7.DISASSEMBLY .................................................................................10
7-1. To open the upper case .........................................................................10
7-2. To remove the Main PCB.......................................................................10
7-3. To remove the keyboard ass'y ...............................................................10
8. DIAGNOSTOC OPERATIONS ....................................................................11
9. IC DATA .................................................................................16
9-1. LB1268 .................................................................................16
9-2. S-80728AN-Z .................................................................................16
10.CIRCUIT DIAGRAM .................................................................................17
11.PCB LAYOUT .................................................................................28
12. PARTS LIST .................................................................................29
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