K Service Source
Power Macintosh 7100 Series
Power Macintosh 7100/66, 7100/66AV,
7100/80, 7100/80AV
K Service Source
Basics
Power Macintosh 7100 Series
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.
Troubleshooting Tips
When troubleshooting Power Macintosh systems, keep in
mind the following:
1
2
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.
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
3
4
provided in the Symptom Charts section of the
Troubleshooting chapter under the “System” topic
heading.
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.
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 7100/80 systems
must have a video card installed in the PDS slot. These
systems use the Power Macintosh 2 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
Table: HDI-45 Pinouts
Pin
Description
1
Analog audio ground
3
Left channel audio input
2
4
5
6
7
8
9
Audio input shield
Right channel audio input
Left channel audio output
Right channel audio output
Reserved
Monitor ID sense line 1
Monitor ID sense line 2
(continued)
Basics
HDI-45 Pinouts - 9
Pin
Description
10
Green ground (shield)
12
Video input power ground
11
13
14
15
16
17
18
19
20
Green video output (75Ω)
Power for camera +5 V
Reserved
Reserved
Reserved
Reserved
Monitor ID sense line 3
S-video input shield
S-video input luminance (Y)
(continued)
Basics
HDI-45 Pinouts - 10
Pin
Description
21
S-video input chroma (C)
23
Reserved
22
24
25
26
27
28
29
30
31
Reserved
Reserved
Reserved
Red ground (shield)
Red video output (75Ω)
I 2C data signal
I 2C clock signal
Reserved
Monitor ID
(continued)
Basics
HDI-45 Pinouts - 11
Pin
Description
32
Monitor ID
33
Vertical sync signal
35
ADB power +5 V
34
36
37
38
39
40
41
42
Composite sync signal
ADB ground
ADB data
Keyboard switch
Reserved
Reserved
Monitor ID
Horizontal sync signal
(continued)
Basics
HDI-45 Pinouts - 12
Pin
Description
43
Video sync ground
45
Blue video output (75Ω)
44
Blue ground (shield)
Basics
Rear Panel Connectors - 13
Rear Panel Connectors
The figure on the following page shows the rear panel of a
Power Macintosh 7100 computer with a 2 MB Video Card
installed. The AV version of the Power Macintosh 7100
would have a Power Macintosh AV Card installed instead of
the 2 MB Video Card. In addition to a DB-15 connector, the
AV Card includes an S-Video Input and an S-video Output
port.
Basics
Rear Panel Connectors - 14
DB-15
Power On
SCSI
Ethernet
HDI-45
Video
ADB
Modem
Printer
Power Macintosh 7100 Rear Panel
Sound In
Sound Out
Basics
Logic Board Connectors - 15
Logic Board Connectors
The figure on the following page shows a Power Macintosh
7100 Series logic board.
Basics
Logic Board Connectors - 16
Power
On/Off
Switch
DRAM SIMMs
SCSI
Ethernet
AV Display
Connector
Serial Ports
ADB
Sound In
Sound Out
601 L2 Cache 601 Soldered
PDS
Slot
DRAM
4 MB
ROM
Power Macintosh 7100 Logic Board
K Service Source
Specifications
Power Macintosh 7100 Series
Specifications
Processor - 1
Processor
CPU
Built-in MMU and FPU
32K of on-chip cache memory
7100/66:
66 MHz PowerPC 601 RISC microprocessor
Requires system software version 7.1.2 or later
7100/80:
80 MHz PowerPC 601 RISC microprocessor
Requires system software version 7.5 or later
Note: To run System 7.5 on the Power Mac 7100/80, you must
install enabler version 1.1.1 or later. This version of the
system software, which ships with the unit, requires Finder
version 7.1.5. You can verify that you have the correct Finder
version installed by using the “Get Info” command.
Specifications
Memory - 2
Memory
RAM
8 MB RAM soldered on logic board, expandable to 136 MB via 4
SIMM sockets on logic board (using pairs of same size, 80 ns
or faster, 72-pin noncomposite SIMMs); 16 MB configuration
has two 4 MB SIMMs installed
Note: SIMMs must be installed in pairs of the same size and
speed. Install noncomposite SIMMS only.
ROM
4 MB installed on SIMM socket
Specifications
Memory - 3
VRAM
7100/66 & 7100/80:
7100/66AV &
7100/80AV:
1 MB, expandable to 2 MB using four 256K VRAM SIMMs
2 MB
Cache
7100/66:
32K of on-chip cache; optional 256K level 2 cache available
7100/80:
32K of on-chip cache; 256K level 2 cache standard
Clock/calendar
CMOS custom chip with long-life lithium battery
Specifications
Disk Storage - 4
Disk Storage
Hard Drive
7100/66:
250 MB or 500 MB hard drive
7100/80:
500 MB or 700 MB hard drive
CD-ROM
7100/66:
Optional internal CD-ROM drive
7100/66AV:
Internal AppleCD 300i Plus CD-ROM drive
7100/80 & 7100/
80AV:
Internal AppleCD 300i Plus CD-ROM drive standard on some
models and optional on others
Specifications
Floppy Drive
Disk Storage - 5
1.4 MB Apple SuperDrive Manual Insert
Specifications
I/O Interfaces - 6
I/O Interfaces
SCSI
Serial
One SCSI port; DB-25 connector
Supports a maximum of six external devices (five when internal
CD-ROM is installed)
Two RS-232/RS-422 LocalTalk/GeoPort serial ports; mini DIN9 connectors (backward compatible with mini DIN-8
connectors)
Apple Desktop Bus
One Apple Desktop Bus (ADB) port; mini-Din-4 connector
Maximum power draw 500 mA; maximum of three devices total
Ethernet
One built-in AUUI-15 Ethernet port
Specifications
I/O Interfaces - 7
Expansion Slot
One processor-direct slot (PDS); 182-pin connector
NuBus
Three NuBus slots support standard size cards; 96-pin Euro-DIN
connectors
Sound
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–20 kHz with a 1-Vrms sine wave input
Specifications
Video
7100/66 & 7100/80:
7100/66AV & 7100/
80AV:
I/O Interfaces - 8
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", 13", 14",
15" portrait, 16", and 17" monitors
Also has a Power Macintosh 2 MB Video Card with one DB-15
VRAM-based video port that supports 12", 13", 14", 15"
portrait, 16", and 17", 20", and 21" monitors
Also has a Power Macintosh AV Card with the following: one DB15 VRAM-based video port that supports 12", 13", 14", 15"
portrait, 16", and 17", 20", and 21" monitors; one S-video/
composite input port; and one S-video composite output port
Note: 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).
Specifications
I/O Devices - 9
I/O Devices
Keyboard
Standard, extended, or adjustable keyboard
Keyboard draws 25–80 mA, depending on model of keyboard
Mouse
ADB Mouse II; Draws up to 10 mA
Microphone
7100/66:
7100/66AV, 7100/80
& 7100/80AV:
Optional Apple PlainTalk microphone; unidirectional and
optimized for use with speech recognition
Apple PlainTalk microphone standard
Specifications
Video Display - 10
Video Display
Video Support
System must have the Power Macintosh 2 MB Video Card or Power
Macintosh AV Card installed
All Power Macintosh 7100 series computers support
monochrome, color, VGA, and SVGA formats on the HDI-45
logic board connector, including:
•
•
•
•
•
•
•
Macintosh 12" Monochrome Display (640 x 480)
Macintosh 12" RGB Display (512 x 384)
AppleColor High-Res RGB 14" Monitor (640 x 480)
Apple AudioVision 14 Display (640 x 480)
Macintosh Color Display (640 x 480)
Macintosh 15" Portrait Display (640 x 870)
Macintosh 16" Color Display (832 x 624)
Specifications
Video Support
(continued)
Video Display - 11
All Power Macintosh 7100 series computers also support the
following monitors via the DB-15 connector on their
respective video cards:
• Macintosh 19" Color Display (1024 x 768)
• Apple Multiple Scan 20 Display (1280 x 1024)
• Macintosh 21" Color Display (1152 x 870)
And the AV versions support the following monitors via the DB-15
connector on the Power Macintosh AV Card:
• NTSC (512 x 384 and 640 x 480)
• PAL (640 x 480 and 768 x 576)
Specifications
Electrical - 12
Electrical
A/C Line Input
Voltage
Input Line
Frequency
Input Power
Power Supply DC
Output
100–240 VAC; RMS single phase, automatically configured
50–60 Hz
167 W maximum continuous, 230 W peak input (not including
monitor power)
112 W continuous output
Specifications
Physical - 13
Physical
Dimensions
Weight
Height: 6.0 in. (152 mm)
Width: 13.0 in. (330 mm)
Depth: 16.5 in. (419 mm)
24 lb. (11.3 kg)
(Weight will vary based on internal devices installed.)
Specifications
Environmental - 14
Environmental
Operating
Temperature
Storage
Temperature
10–40° C (50–104° F)
–40 to 47° C (–40 F to 116.6° F)
Relative Humidity
5–90% (noncondensing)
Altitude
0–3,048 m (0–10,000 ft.)
K Service Source
Troubleshooting
Power Macintosh 7100 Series
Troubleshooting
General/ - 1
General
The Symptom Charts included in this chapter will help you
diagnose specific symptoms related to your product. Because cures
are listed on the charts in the order of most likely solution, try
the first cure first. Verify whether or not the product continues to
exhibit the symptom. If the symptom persists, try the next cure.
(Note: If you have replaced a module, reinstall the original module
before you proceed to the next cure.)
If you are not sure what the problem is, or if the Symptom Charts
do not resolve the problem, refer to the Flowchart for the product
family.
For additional assistance, contact Apple Technical Support.
Troubleshooting
Symptom Charts/Power Supply - 2
Symptom Charts
Power Supply
System does not
power up
1
2
3
4
Reset logic board. (Refer to Additional Procedures.)
Reseat ROM SIMM and cache SIMM.
Replace power supply.
Replace logic board.
Troubleshooting
Symptom Charts/Error Chords - 3
Error Chords
One-part error
chord sounds during
startup sequence
1
2
3
Disconnect hard drive power cable and hard drive data cable.
Reboot system. If startup sequence is normal, run Macintosh
Hard Disk test and replace hard drive if necessary.
Disconnect floppy drive cable and reboot system. If startup
sequence is normal, replace floppy drive.
Replace logic board. Retain customer’s SIMMs.
Troubleshooting
Symptom Charts/System - 4
System
Does not power on;
screen is black, fan is
not running and LED
is not lit
1
2
3
4
5
6
7
Check cables.
Plug monitor directly into wall socket, and verify that
monitor has power.
Reset logic board. (Refer to Additional Procedures.)
Reseat ROM SIMM and cache SIMM.
Replace power cord.
Replace power supply.
Replace logic board.
Clicking, chirping or
thumping
1
2
Replace power supply.
Replace logic board. Retain customer’s SIMMs.
Troubleshooting
Symptom Charts/System (Continued) - 5
System (Continued)
System shuts down
intermittently
1
2
3
4
5
Check that air vents are clear. Thermal protection circuitry
may shut down system. After 30 to 40 minutes, system
should be OK.
Replace power cord.
Check batteries. Refer to "Battery Verification" in Additional
Procedures.
Replace power supply.
Replace logic board. Retain customer’s SIMMs.
Troubleshooting
Symptom Charts/System (Continued) - 6
System (Continued)
System
intermittently
crashes or locks up
1
2
Verify that system software is version 7.1.2 or later.
Verify SIMMs are noncomposite and installed in like pairs
(same size/speed).
3 Verify that software is known-good.
4 Verify that software is Power Macintosh compatible (contact
developer).
5 Verify that a video card is installed in the PDS slot.
6 Clear parameter RAM. Hold down
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