Caple C871i Bedienungsanleitung PDF herunterladen (Seite 56)

100

101

Apple II Computer Info

strengthens the wires and crimp pins. It is flexible, so just bend the

wires slowly as they are positioned in the IIgs casing.

13. Does plug insertion endanger the male pins of the motherboard IIgs

connector? This is doubtful; All the power supplies are pretested prior

to shipment on my two IIgs systems at home. Each motherboard power point

has had MANY power supplies connected, and no pins have been broken yet.

TROUBLE-SHOOTING TIPS

HHHHHHHHHHHHHHHHHHHHH

PROBLEM COMMENTS / WHAT TO DO

============================================================

=============== UNIT DOES NOT POWER-UP. 1. Check power switch: "|" is

on, "0" is off.

2. Try a different AC power cord; internal crimps

on the AC power cord's female connector may be

spread too wide to make good contact with the

power unit's male input prongs.

3. Shake the power supply and listen for rattling

sound. Rough handling during shipment may

have

shaken loose the internal fuse. (Fuse is

soldered to holder in half the power units,

but

is clamped in place in half the units.)

4. Fuse may have blown; must be inspected

visually

by opening the case with power cord unplugged.

5. Use caution if testing voltages with standard

voltmeter probes inserted into IIgs female

Molex-7 plug, or into IIe female AMP-6 plug.

Voltmeter probes are too wide for the crimp

pins, and will spread the crimps, causing poor

contact on the motherboard connector. Safe

way

to test voltages is to insert short length of

paper clip into the plug, then touch voltmeter

probe to paper clip metal. Alternatively, IIgs

Molex-7 plug has exposed metal strips on its

back side on which voltmeter probes can be

safely touched.

UNIT STARTS BUT SHUTS 1. Half the units have "no-load auto-off"

OFF IMMEDIATELY. protection circuit, which shuts off power

immediately if no load is connected. If power

supply has this feature, the phrase is etched

near the power switch. Voltage can be tested

by connecting a load (such as a hard drive) to

Molex-4 connector; fan will spin and voltages

can be tested.

UNIT POWERS-UP BUT 1. This is more often a problem with IIgs ROM 3

than

APPLE THEN CRASHES with IIgs ROM 1 or with IIe. Some large power

IMMEDIATELY. supplies have a slower "rise-time" to their

target voltages. Solution is to do a "warm

Apple II Computer Technical Information : Apple II Family Hardware Info

ftp://ground.ecn.uiowa.edu/2/apple2/miscinfo/hardware : May 2001 : 56 of 572

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