Caple C871i Bedienungsanleitung PDF herunterladen (Seite 498)

Apple II Computer Info

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From: [email protected]

Newsgroups: comp.sys.apple2

Subject: csa2 chronicles: hacker's corner

Date: 23 Nov 1996 20:40:50 GMT

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Hacker's Corner

Replacing the System Saver IIGS Fan

Does your Kensington System Saver IIGS sound like a broken record? It may

be that the fan inside the unit is showing wear. The good news is that

replacing the fan is an easy and rewarding task.

I knew my fan was starting to die when it sounded like it was wheezing

during spin-up. The fan, a Sprite model SU2C7, uses sleave bearings,

whose lifespan is determined by the lubricating oil supply in the

bearings. When enough of the oil evaporates, metal will grind against

metal resulting in heat and resistance that cause the fan to quickly

lock-up. Better quality fans use ball-bearings, but Kensington

apparently used the cheapest component available. Even among the models

with sleave bearings, the SU2C7 is the least capable. It can only move

15 cubic feet of air a minute (half what a typical PC fan moves) and has

a 55,000 hour rating.

In looking for a replacement for my dying fan, I chose to use a better

model. The Sprite model SU2B1 has the same dimensions as the SU2C7 used

in the System Saver and is readily available from Digi-Key corporation.

It uses ball bearings for long life (the fan is rated for 73,000 hours)

and can move 28 cubic feet of air a minute. The higher quality is

readily apparent: the replacement is currently noticeably quieter than

the original even though it is moving more air per minute.

Make sure the System Saver is unplugged before opening the case.

Opening the System Saver case involves removing eight screws. You must

remove the foam weatherstriping along the periphery of the case to expose

Apple II Computer Technical Information : Apple II Family Hardware Info

ftp://ground.ecn.uiowa.edu/2/apple2/miscinfo/hardware : May 2001 : 498 of 572

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