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K Service Source
Power Macintosh G3/Macintosh
Server G3 (Blue and White)
Power Macintosh G3 (Blue and White),
Macintosh Server G3 (Blue and White),
Macintosh Server G3 with Mac OS X Server
K Service Source
Hot Issues
Power Macintosh G3/Macintosh
Server G3 (Blue and White)
Hot Issues Introduction - 1
Introduction
This chapter is designed to highlight unique or high-priority
product issues that you should be aware of before servicing
the Power Macintosh G3/Macintosh Server G3 (Blue and
White) computer. Note: To avoid confusion with other
products called "G3," Service Source and Price Pages
documentation added the words "Blue and White" after the
product name.
This chapter alerts you to important issues and provides
pointers to other areas in the manual where more complete
information can be found.
To familiarize yourself with a new product family, always
read the Basics chapter in its entirety. You should also refer
to the Troubleshooting chapter for basic theory of
operations information.
Hot Issues Processor Module vs. Card - 2
Processor Module vs. Card
Whereas previous Power Macintosh computers featured a
user-installable processor card, this logic board uses a
processor module that must not be removed by the customer
(see "Processor Module" in the Take Apart chapter).
Processor Module Jumper
The Power Macintosh G3/Macintosh Server G3 logic board
has a processor module jumper installed at J25. The
processor jumper is color coded for the speed of processor
module used (yellow jumper for 450 MHz, white jumper
for 400 MHz, blue jumper for 350 MHz, and black jumper
for 300 MHz). Failure to install the correct jumper may
result in a computer that won't boot up. (See "Jumper
Location") in the Troubleshooting chapter.
Hot Issues Warranty Sticker - 3
Warranty Sticker
There is a warranty sticker that covers the processor
module jumper. The customer's warranty is void if this
sticker is tampered with. Apple-authorized service
providers must replace this sticker if they have removed it
during servicing to protect the customer's warranty. (See
"Processor Module" in the Take Apart chapter.)
Power Supply Voltage Setting
There is a switch on the back of the power supply that
controls the voltage setting. The voltage switch must be set
correctly to avoid damaging the computer. (See "Voltage
Switch" in the Basics chapter for more information,
including an international voltage chart.)
Hot Issues I/O Card - 4
I/O Card
Some I/O functions on the Power Macintosh G3/Macintosh
Server G3 logic board are handled through a removable I/O
card that must be installed for the computer to operate
properly.
SDRAM DIMMS
The DIMM modules used in any previous Power Macintosh or
Power Macintosh G3 computer model are not compatible
with the Power Macintosh G3/Macintosh Server G3 (Blue
and White) computers described in this manual. The SDRAM
DIMM modules for these computers must be PC-100
compliant,168-pin, 3.3-volt, unbuffered, and rated at 125
MHz (8 ns) or faster.
Hot Issues SDRAM DIMMS - 5
Characteristics of the memory to be used in Power Macintosh
G3/Macintosh Server G3 (Blue and White) are: