Section 4 - Fault Diagnosis and Repair
 | Contents : |  | Figures : |  | Tables : |
---|---|---|---|---|---|
4.1 | 4.1 | JEDEC Modification Solder Side of Board | 4.1 | Power supply voltages | |
 | Test Equipment | 4.2 | JEDEC Modification Component Side of Board | 4.2 | Typical voltages |
 | Modification History |  |  | 4.3 | Typical waveforms and voltages |
4.2 | Fault Diagnosis | Â | Â | 4.4 | Coma voltages |
 | Techniques |  |  |  |  |
 | Power Up |  |  |  |  |
 | Keyboard |  |  |  |  |
 | 128k RAM Packs |  |  |  |  |
4.3 | Repair | Â | Â | Â | Â |
 | General |  |  |  |  |
 | EPROM Substitution |  |  |  |  |