TOPIC
Customer says he has noticed the Power PC 7600 fan speed apparently increases with changes in temperature. When the case is removed, the fan speed appears to decrease. Is this normal operation?
DISCUSSION The change in the speed of the fan is normal; it is a variable speed fan. The power supply used in the Power Macintosh 7200/7300/7500/7600 enclosure contains a fan speed control circuit. The circuit is designed to monitor the temperature of two critical heatsinks used in the power supply. As the temperature of those heatsinks rises and lowers, the speed of the fan is adjusted to compensate for the change in temperature. |
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| Document Information | |
| Product Area: | Computers |
| Category: | Power Macintosh |
| Sub Category: | Power Macintosh 7200; Power Macintosh 7300; Power Macintosh 7500; Power Macintosh 7600 |
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