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Maintenance & Service Guide
Presario 1600 Series Portable Computers
Notice Preface Home Product Description Troubleshooting Illustrated Parts Catalog
Removal & Replacement Procedures Specifications Connector Pin Assignments Battery Pack
Dip Switch Settings
CAUTION: When replacing the system board, ensure the dip switch voltage settings on the system board are correct for the computer model and processor voltage marked on the processor chip. If the system board dip switch voltage settings are not correct, damage may occur to the computer and/or system board.
Dip Switch System Board Settings
CPU Core Voltage Setting
Core Voltage | ||||
1.2V (Set as | On | Off | Off | |
Default) | ||||
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2.2V | Off | Off | On | |
2.45V | Off | On | Off |
Power OK Voltage Setting
Core Voltage | ||||
1.2V (Set as | On | Off | Off | |
Default) | ||||
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2.2V | Off | Off | On | |
2.45V | Off | On | Off |
Bus Frequency Setting
HCLK | |||
66.6 | Mhz (Set as | On | |
Default) | |||
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66.0 | Mhz | Off |
NOTE: The black area on the dip switch indicates the position of the switch.
Bus Ratio Setting
FRACTION | |||
2.0X (133MHZ) | ON | OFF | OFF |
2.5X (166MHZ) | ON | ON | OFF |
3.0X (200MHZ) | OFF | ON | OFF |
3.5X (233MHZ) | OFF | OFF | OFF |
4.0X (266MHZ) | ON | OFF | ON |
4.5X (300MHZ) | ON | ON | ON |
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