Apple Macintosh Powermac Performa WS8150 Service Manual

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Service Source

Power Macintosh 8100/

WS 8150

Power Macintosh 8100/80 and 8100/80AV, Power

Macintosh 8100/100 and 8100/100AV, Power

Macintosh 8100/110, Workgroup Server 8150,

Workgroup Server 8150/110

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Service Source

Basics

Power Macintosh 8100/WS 8150

Basics Power Macintosh System Overview - 1

Power Macintosh System Overview

PowerPC microprocessors are a family of processors built
on reduced instruction-set computing (RISC) technology.
RISC processors streamline the internal workings of
computers. Whereas traditional (complex instruction-set
computing, or CISC) processors contain a wide variety of
instructions to handle many different tasks, RISC
processors contain only those instructions that are used
most often. When a complex instruction is needed, a RISC
processor builds it from a combination of basic instructions.

RISC processors are designed to execute these basic
instructions extremely quickly. The performance gains
achieved by speeding up the most-used instructions more
than compensate for the time spent creating less-used
instructions.

Basics Power Macintosh System Overview - 2

Previously, RISC technology had been used only in high-end
workstations and commercial database servers. With the
introduction of Macintosh PowerPC computers, Apple
succeeded in bringing RISC technology to personal
computing.

Key Points

Three key points to remember about a PowerPC processor­based Macintosh system: It's a Macintosh; it's compatible; it
offers tremendous performance.

Apple's PowerPC computers feature the same user interface
as their 680x0-based predecessors. Users can mix RISC­based and 680x0-based Macintosh systems on the same net­work and exchange files and disks between them. In addition,
users can run both 680x0 and native PowerPC applications
on the same Power Macintosh system simultaneously.

Basics Power Macintosh System Overview - 3

Compatibility is not limited just to applications. INITs,
CDEVs, drivers, and other Macintosh utility software also
work on PowerPC processor-based Macintosh systems. So do
AppleTalk devices (such as printers), SCSI devices (such as
hard drives and scanners), ADB devices (such as mice,
trackballs, and keyboards), and other Macintosh cards and
peripherals.

The primary operating system for PowerPC processor­based Macintosh computers is System 7. The operating
system has been optimized for the highest performance on
the PowerPC processor. This optimization of System 7
benefits applications written for 680x0 systems as well as
those developed specifically for PowerPC processor-based
systems.

And while PowerPC-based Macintosh systems running
native applications offer two to four times the performance

Basics Power Macintosh System Overview - 4

of the fastest 68040- and 80486-based personal
computers, the real promise of PowerPC technology is that
it enables Apple and other developers to deliver new
software capabilities on Macintosh systems that were
previously available only on high-end workstations.

T r oubleshooting T ips

When troubleshooting Power Macintosh systems, keep in
mind the following:

1 If a Power Macintosh system does not power up, you

should first attempt to reset the logic board. Instruc­tions are provided in the Additional Procedures chapter.

2 With Power Macintosh computers, you must install

noncomposite RAM SIMMs only, and the RAM SIMMs
must be installed in like pairs (that is, the same size and
speed). Additional troubleshooting information is

Basics Power Macintosh System Overview - 5

provided in the Symptom Charts section of the
Troubleshooting chapter under the “System” topic
heading.

3 If a Power Macintosh system has bad RAM SIMMs

installed, you will not hear death chimes. Instead, a
dialog box will appear alerting you to the fact that a bad
RAM SIMM has been detected. Additional troubleshooting
information is provided in the Symptom Charts section
of the Troubleshooting chapter under the “System” topic
heading.

4 If the system hangs shortly after installing a new NuBus

card, contact the vendor to verify that the card is
compatible with the Power Macintosh system or to see if
there is a software upgrade available. If the NuBus card
is an Apple manufactured product, refer to the Service
Tech Info Library for more information.

Basics Power Macintosh System Overview - 6

5 The Power Macintosh AV systems use the same logic

board as the non-AV versions. The only difference is that
the AV versions have the Power Macintosh AV Card
installed in the PDS slot.

The Power Macintosh 7100/66 and 8100/80 systems

must

have a video card installed in the PDS slot. The
Power Macintosh 7100/66 system uses the Power
Macintosh 2 MB Video Card and the Power Macintosh
8100/80 system uses the Power Macintosh 4 MB Video
Card. A missing card can result in a system that won't
boot or a system that crashes.

Basics HDI-45 Pinouts - 7

HDI-45 Pinouts

This section includes an illustration of the HDI-45
connector and a table containing the pinout descriptions.

Figure: HDI-45 Connector on the Logic Board

Basics HDI-45 Pinouts - 8

Pin Description

1 Analog audio ground

2 Audio input shield

3 Left channel audio input

4 Right channel audio input

5 Left channel audio output

6 Right channel audio output

7 Reserved

8 Monitor ID sense line 1

9 Monitor ID sense line 2

10 Green ground (shield)

Table: HDI-45 Pinouts

Basics HDI-45 Pinouts - 9

Pin Description

11 Green video output (75Ω)

12 Video input power ground

13 Power for camera +5 V

14 Reserved

15 Reserved

16 Reserved

17 Reserved

18 Monitor ID sense line 3

19 S-video input shield

20 S-video input luminance (Y)

21 S-video input chroma (C)

Basics HDI-45 Pinouts - 10

Pin Description

22 Reserved

23 Reserved

24 Reserved

25 Reserved

26 Red ground (shield)

27 Red video output (75Ω)

28 I2C data signal

29 I2C clock signal

30 Reserved

31 Monitor ID

32 Monitor ID

Basics HDI-45 Pinouts - 11

Pin Description

33 Vertical sync signal

34 Composite sync signal

35 ADB power +5 V

36 ADB ground

37 ADB data

38 Keyboard switch

39 Reserved

40 Reserved

41 Monitor ID

42 Horizontal sync signal

43 Video sync ground

Basics HDI-45 Pinouts - 12

Pin Description

44 Blue ground (shield)

45 Blue video output (75Ω)

Basics Rear Panel Connectors - 13

Rear Panel Connectors

The figure on the following page shows a Power Macintosh
8100 computer with a 4 MB Video Card installed. The AV
version of the Power Macintosh 8100 would have a Power
Macintosh AV Card installed instead of the 4 MB Video Card.
In addition to a DB-15 connector, the AV Card includes an S­Video Input and an S-Video Output port.

Basics Rear Panel Connectors - 14

Power-On

SCSI

Ethernet

HDI-45 Video

Printer

Modem

ADB

Sound Out

Sound In

Power Macintosh 8100 Rear Panel

DB-15

Basics Logic Board Connectors - 15

Logic Board Connectors

The figure on the following page shows a Power Macintosh
8100/80 logic board.

Caution

8100/100 and 8100/110 Series logic boards have a
thermoelectrical cooling device that attaches directly to the
microprocessor’s heatsink. You can identify this cooling
device by the black and red wires that run to the right of the
heatsink and plug into the logic board via a keyed connector.
This device is not a serviceable item. Do
device or you may damage the logic board.

: It is important to note that the Power Macintosh

not

unplug this

Basics - 16

Speaker
CD-ROM/
Tape SCSI

Power On

Power
Supply

CD-ROM
Audio

Floppy
Drive

LED

SCSI

Ethernet

PowerPC 601 Chip

HDI-45 Video

Printer

Modem

ADB

Sound Out

Sound In

601
PDS

ROM
Slot

L2 Cache
Slot

DRAM SIMMs

8 MB Soldered
DRAM

Hard Drive
SCSI

NuBus
Slots

Basics Apple RAID Software - 17

Apple RAID Software

Apple RAID (Redundant Array of Independent Disks)
software protects data from loss during a disk failure and
enhances the speed of data storage and retrieval. It is
available for all Power Macintosh Workgroup servers.

Data protection is achieved through disk mirroring, a data
storage scheme in which identical data is stored on two
different disks. Apple RAID can also be configured for disk
striping, a data storage scheme in which successive units of
data are transferred to several disks at one time.

If you plan to install the Apple RAID software on an existing
Power Macintosh Workgroup Server, or if you are
reinitializing an existing Apple RAID drive, keep in the mind
the following:

Basics Apple RAID Software - 18

• If you wish to use your server's startup disk for Apple
RAID, do not install the Apple RAID program on your
startup disk until you have initialized and set up new
volumes on that disk. Before you initialize the startup
disk, back up all valuable data.

• You must reinitialize all disks on which you will use
Apple RAID volumes. Initializing with Apple RAID
removes all data, so be sure to back up your disks first.

• Apple HD SC Setup does not recognize Apple RAID
volumes. If you want to remove or resize volumes on
Apple RAID disks, use the Apple RAID program.

• The Apple RAID CD contains the facilities to reinstall
your system software. However, if you have made any
customizations to your system files, such as adding
extension files, control panels, or preference files, then

Basics Apple RAID Software - 19

back up your system files now. Back them up in such a
way that you can restore your system files separately
from the nonsystem files on your disk. You will later
restore your system files using the backup copy rather
than the System Installer on the RAID CD, so that you
preserve your system customizations.

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Service Source

Specifications

Power Macintosh 8100/WS 8150

Specifications Processor - 1

Processor

CPU

8100/80 & 8150

8100/100, 8100/110 &
8150/110

Built-in MMU and FPU
32K of on-chip cache memory
80, 100 or 110 MHz PowerPC 601 RISC microprocessor

Requires system software version 7.1.2 or later

Requires system software version 7.5 or later

Note

: To run System 7.5 on these systems, you need enabler
version 1.1.1 at a minimum. This version of the system
software requires Finder version 7.1.5. You can verify the
Finder version installed by using the "Get Info" command.
Refer to the Tech Info Library for more information.

Specifications Memory - 2

Memory

RAM

8100/80, 8100/100 &
8150

8100/110 & 8150/110

8 MB RAM soldered on logic board, expandable to 264 MB via 8

SIMM sockets on logic board (using pairs of same size, 80 ns
or faster, 72-pin noncomposite SIMMs); Optional 16 MB
configuration has two 4 MB SIMMs installed

16 MB RAM standard (8 MB soldered on logic board and two 4 MB

SIMMs), expandable to 264 MB via 8 SIMM sockets on logic
board (using pairs of same size, 80 ns or faster, 72-pin
noncomposite SIMMs)

Note

: SIMMs must be installed in pairs of the same size. Install

noncomposite SIMMS only.

Specifications Memory - 3

VRAM

8100/80, 8100/100,
8100/110, 8150 &
8150/110

8100/80AV & 8100/
100AV

8150 & 8150/110

ROM

Cache

Clock/Calendar

2 MB of VRAM on video card, expandable to 4 MB using 512K

VRAM SIMMs

2 MB of VRAM on Macintosh AV card, including support for NTSC

or PAL monitors

None

4 MB installed on ROM SIMM

32K on-chip cache; 256K level 2 cache SIMM

CMOS custom chip with long-life lithium battery

Specifications Disk Storage - 4

Disk Storage

Hard Drive

8100/80

8150

8100/100

8100/110

8150/110

Floppy Drive

500 MB or 1 GB hard drive

500 MB, 1 GB, or 2 GB hard drive

700 MB or 1 GB hard drive

2 GB hard drive

1 GB hard drive

1.4 MB Apple SuperDrive Manual Insert

Specifications Disk Storage - 5

CD-ROM Drive

8150/110

Internal AppleCD 300 Plus CD-ROM drive optional on some

models and standard on other models

AppleCD 600 CD-ROM drive standard

Specifications I/O Interfaces - 6

I/O Interfaces

SCSI

Serial

Apple Desktop Bus

Ethernet

One SCSI port; DB-25 connector
Supports maximum of six external devices (five with CD-ROM

drive)

Two RS-232/RS-422 LocalTalk/GeoPort serial ports; mini DIN-

9 connectors (backward compatible with mini DIN-8
connectors)

One Apple Desktop Bus (ADB) port; mini-Din-4 connector
Maximum power draw 500 mA; maximum of three devices total

One Ethernet port; AAUI-15 connector

Specifications I/O Interfaces - 7

Expansion Slot

NuBus

Sound

One processor-direct slot (PDS); 182-pin connector

Three slots support long or short expansion cards; 96-pin Euro-

DIN connectors

16-bit stereo in and out
Sample rates of 48, 44.1, 24, and 22.05 kHz
Input/output line level: 1 V peak-to-peak
Input/output signal-to-noise ratio (SNR): 82 dB with no audible

discrete tones

Bandwidth: 20 Hz–20 kHz (± 2 dB) at 44.100 kHz sample rate
THD+N (total harmonic distortion plus noise): less than 0.05%,

measured 20Hz–20kHz with a 1-Vrms sine wave input

Specifications I/O Interfaces - 8

Video

8100/80, 8100/100,
8100/110

8100/80AV & 8100/
100AV

One HDI-45 DRAM-based video port on logic board supports

direct connection to Apple AudioVision monitors and with
optional HDI-45 to DB-15 adapter supports 12-in., 13-in.,
14-in., 15-in. portrait, 16-in., and 17-in. monitors

Come with a Power Macintosh 4 MB Video Card with one DB-15

VRAM-based video port that supports 12-in., 13-in., 14-in.,
15-in. portrait, 16-in., 17-in., 20-in., and 21-in. monitors

Come with a Power Macintosh AV Card* with: one DB-15 VRAM-

based video on the card that supports 12-in., 13-in., 14-in.,
15-in. portrait,16-in., 17-in., 20-in., and 21-in.
monitors; one S-video/composite input port; and one S-video
composite output port

*Only one monitor can be attached to the card at one time (that
is, either through the DB-15 port or the S-video port).