Caple C871i Manual do Utilizador descarregar pdf (Página 55)

Apple II Computer Info

floor,

especially through the fan openings. Put a barrier (e.g., plastic lid for

tennis balls, coffee, etc.) on the power supply if a fan opening is facing

upward.

3. If drinks or other liquids are occasionally spilled on the floor near

your

computer desk, then it may be prudent to raise the height of the power

supply

1"-3" above the floor by placing height spacers below it.

4. Puppies, babies, etc. may damage the cable or external power supply.

The

heavy duty 600v insulation gives maximum protection, but keep young kids

and

puppies away from the power supply!

5. When transporting your computer, remember that the MOLEX-7 PLUG and its

motherboard mating socket are delicate! Either carefully remove the plug,

secure the cable so that movement won't stress the plug.

6. Fan openings in the case expose the power supply at risk to rain damage

when using the computer outdoors.

7. An Internet correspondent stated that high capacity power supplies can

create problems because the underloaded power capacity makes the internal

protection circuits less responsive.

8. The older RamFast SCSI cards by C.V. Technologies appear to be finicky

about the 200 watt power supplies. If you have an older (Rev. B or Rev.

C) RamFast card, then the you should get the 150 watt version, not the

200 watt version. Why? I suspect that the 150 watt version delivers

output voltages that are more precisely on target because the load is

closer to the power supply's capacity.

9. Two users (among 68 users so far) have expressed concern about radio

frequency (RF) interference emanating from the cable. Presently I am

trying out a metal braid shielding option (MagnaBraid, available from auto

parts supply shops), but it is premature to judge at this time whether

this shielding makes any difference. Most users have reported no RF

interference.

10. Do not damage the Molex-7 crimp-pins by pushing voltmeter probes into

them! The standard voltmeter probes are too wide for insertion into the

Molex-7 plug. Two safer options are available: (a) Clip a 1" lengths of

jumbo paper clip, then insert that section into the crip-pin opening.

Measure voltage by touching the voltmeter probe to the paper clip. (b)

Touch the voltmeter probes on the metal strips exposed on the back side of

the Molex-7 plug.

11. Some large power supplies have a slower "rise-time" to their target

voltages. If the Apple crashes immediately at power-up, then allow 5-10

seconds of warm-up, followed by a PR#n "warm re-boot," where n is the slot

number of your hard drive card (Typically this is PR#7 if you boot from

the hard drive as most users do.)

12. The Molex-7 IIgs power plug may feel stiff because of the clear

silicon caulking that surrounds the wires. The silicon adhesive

Apple II Computer Technical Information : Apple II Family Hardware Info

ftp://ground.ecn.uiowa.edu/2/apple2/miscinfo/hardware : May 2001 : 55 of 572

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