Power Computing Minitower 132 User manual

CONFIDENTIAL
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PowerCenter
ª
PowerCenter
ª
Certification Module
Certification Module
PowerCenter Minitower 132/150/166/180
PowerCenter
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NT Specifications
Specifications for the PowerCenter NT 132/150/166/180 ......................................................................Page 2
MLB Diagram ................................................................................................................................................Page 5
CUDA Reset
For Your Safety .............................................................................................................................................Page 3
Purpose of CUDA Reset...............................................................................................................................Page 4
Bezel Removal/Installation
Removing and installing the chassis cover................................................................................................Page 6
Removing and installing the front bezel....................................................................................................Page 7
Board Removal/Installation Procedures
Removing and installing RAM.....................................................................................................................Page 9
Removing and installing VRAM.................................................................................................................Page 11
Removing and installing CPU card...........................................................................................................Page 13
Removing and installing L2 cache............................................................................................................Page 15
Removing and installing PCI expansion cards........................................................................................Page 16
Removing and installing PCI Riser card...................................................................................................Page 19
Drive Removal/Installation Procedures
Removing and installing drives in the 3.5-inch drive bay......................................................................Page 21
Removing and installing drives in the 5.25-inch drive bay....................................................................Page 22
Removing and installing the floppy disk drive .......................................................................................Page 24
System Level Removal/Installation Procedures
Removing and installing the MLB.............................................................................................................Page 26
Removing and installing the power supply ............................................................................................Page 29
Table of Contents
Table of Contents
Table of Contents

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CPU PowerPC 604 at 132, 150, 166 or 180MHz
Main Logic Board Catalyst (Comparable to a Macintosh 7200)
CPU Upgrade Available via daughtercard replacement
MacOS 7.5.2, 7.5.3, 7.5.5, 7.6, 7.6.1
Memory 4 DIMM slotsÑ168-pin, 64 bit, 70 ns (512 Mb max); Memory interleaving not
supported
Cache 512 KB Level 2
SCSI SCSI-2; 5 MB/sec data transfer rate
Serial Ports High speed GeoPort-compatible 9-pin modem and printer ports
Network Built-in Ethernet AAUI port; Built-in Ethernet 10 Base-T port;
LocalTalk serial connection via modem or printer port
Bus Expansion Three PCI expansion slots
Floppy Drive One 3.5-inch, 1.4MB floppy disk drive. Supports MacOS, Windows, DOS, OS/2
and ProDOS disk formats.
Video Internal video with both Mac and SVGA connections
1MB VRAM built-in and upgradeable to 4MB max
Optional high-quality accelerated video cards
Audio 16 bit, 44.1 KHz Stereo in/out connections (microphone port requires line-level
input, such as AppleÕs Plaintalk Microphone); Built-in speaker
ROM Removeable Apple ROM
Case style Mini-tower
Drive Bays Three front accessible, full-height 5.25-inch drive bay; one internal 3.5-inch full
height drive bay
Dimensions 7"(W) X 15"(H) X 16"(D); 22 lb (10.5 kg)
Power Supply 200W, 100V-240V (Domestic/International manual switching)
PowerCenter NT Specifications
PowerCenter NT Specifications
PowerCenter LP Specifications

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To ensure your personal safety as well as prevent unnecessary damage to the computer, please follow all
safety precautions when performing any service on Power Computing computers.
NN
NNoo oott ttee ee
: Always make sure that the computer is powered down before attempting any service. To make
sure that the computer is completely powered down, check the light behind the power button
on the front bezel and make sure that it is off.
Preventing ESD (Electrostatic Discharge) - There are two means by which a technician can maintain a
ground and eliminate ESD:
¥ wear an ESD wrist strap that is grounded to the computer
¥ power down the computer, but leave the CPU power cord plugged into the wall socket; touch the
metal case of the power supply to ensure complete static discharge before service.
Do not wear loose clothing or jewelry that may become caught in the components inside of the
computer case.
Make sure that the work environment is free from excessive moisture. Any moisture on the components
of the computer may cause damage.
For Your Safety
For Your Safety
If you need further assistance, please call:
1-800-708-6227

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The CUDA Reset button is a small red button located on the Main Logic Board. Depressing this button
resets the CUDA Microcontroller Chip. This chip is responsible for the following functions:
¥ Turns system power on and off
¥ Manages system resets from various commands
¥ Maintains parameter RAM
¥ Manages the Apple Desktop Bus (ADB)
¥ Manages the real-time clock
¥ Lets an external signal from either Apple GeoPort serial port control system power
It is rarely necessary to reset CUDA, but many problems that appear to be hardware related can be fixed
by doing so. Resetting CUDA will not harm the machine in any way. Some of the most common reasons
to reset CUDA are:
¥ After adding RAM, the machine will not boot, RAM does not show up in the memory control panel,etc.
¥ Machine will not power up
¥ Machine powers up, but does not chime or boot
¥ A serial port remains inaccessible even after booting without extensions, resetting parameter RAM, etc.
¥ Machine will power down for no apparent reason
¥ After adding any hardware to the inside of the machine
Resetting CUDA
1. Shut down the computer and disconnect all external devices, but leave the power cable plugged in to
ground the computer.
2. Remove the cover ( refer to Chassis Cover Removal/Installation on page 6).
3. Touch the metal chassis of the machine. This will dissipate static electricity into ground.
4. Locate the CUDA Reset button (
refer to MLB Diagram on page 5).
5. Press the CUDA Reset button for a few seconds.
6. Reboot, and verify resolution of the problem you wanted to solve.
NN
NNoo oott ttee ee::::
Resetting the CUDA will cause some system settings to default to factory settings.
CUDA Reset
CUDA Reset
CUDA Reset

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MLB DIAGRAM
MLB DIAGRAM
MLB Diagram

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Removing the Chassis Cover
1. Shut down the computer and turn off all external devices. If you do not have a grounding strap,
leave the computer plugged into the wall socket. Leaving the computer plugged in ensures a
positive ground. Disconnect everything but the power cord.
2. Remove the four thumb screws from the rear of the computer.
3. Push the cover back and away from the machine chassis. Lift the cover up and remove from the
chassis.
Installing the Chassis Cover
1. With the computer upright, place the cover over the chassis. Push the cover towards the front of the
chassis. The front lip of the cover will engage the chassis frame.
2. Replace the four thumb screws from the rear of the computer.
3. Reconnect the cables to the machine.
Chassis Cover Removal/Installation
Chassis Cover Removal/Installation
Figure 1: Removing the chassis cover
thumb screws
Side Panel

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Removing the Front Bezel Cover
1. Remove the chassis cover ( refer to Chassis Cover Removal/Installation on page 6).
1. Remove the main logic board protector plate on the closed side of the chassis by removing the four
securing screws and placing the plate aside.
2. Remove the six screws that secure the bezel to the front of the computer (
see Figure 2: Removing
protective plate
on page 7). All of these screws must be removed before the front bezel can be
removed. The screws are located on the inside of the chassis frame:
¥ one is on the top left end of the chassis
¥ one is in the left middle of the chassis
¥one is on the bottom left end of the chassis
¥ one is on the top right end of the chassis
¥ one is in the right middle of the chassis
¥one is on the bottom right end of the chassis
Gently pull the bezel directly forward to disengage. Lay the bezel face down directly in front of the chassis.
3. Disengage the wiring between the chassis and the front bezel.
Front Bezel Removal/Installation
Front Bezel Removal/Installation
Figure 2: Removing protective
plate
retaiing screws
Front Bezel

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Installing the Front Bezel
1. Connect the switch and speaker wires to their respective ports on the main logic board.
2. Screw the bezel to the chassis front with the six retaining screws.
3. Replace the MLB protection plate on the closed side of the chassis.
4. Replace the chassis cover (
refer to Chassis Cover Removal/Installation on page 6).
Figure 3: Removing retaining
screws
retaiing screws

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NN
NNoo oott ttee ee::::
All DIMMs must be 168-pin, fast-paged mode, 70-nanosecond RAM access time or faster. The
PowerCenter has four DIMM slots near the front on the motherboard. DIMMs may be installed in
any slot.
Removing RAM
1. Remove the chassis cover ( refer to Chassis Cover Removal/Installation on page 6).
2. Place the unit on its side with the MLB on the bottom and the open side facing up.
3. Locate the DIMM(s) you would like to remove (
see Figure 3: on page 9). Loosen the desired DIMM
module by reaching in and pushing down on the small lever at the end of the DIMM slot. ( see
Figure 4: Removing RAM on page 9). The DIMM should pop loose from the slot at the lever end.
4. Grasp the DIMM module on each end and evenly pull the module up and out of the slot.
Installing RAM
1. Hold the module (with the contacts down) with one hand at each end. Notice that there are two
notches in the contact edge of the DIMM module.
2. Lower the DIMM squarely into the slot so that the notches in the DIMM line up with the notches
RAM Removal/Installation
RAM Removal/Installation
Figure 3:
DIMM slot
location
Figure 4: Removing RAM
DIMM Slots
RAM

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in the slot. Slide the contacts straight into the slot and make sure the contacts are firmly seated.
(
see Figure 5: Installing RAM on page 10). When properly seated, the contacts on the bottom
should not be visible.
NN
NNoo oott ttee ee::::
DonÕt force the DIMM module into the slot; if the MLB starts bending significantly, pull the
DIMM out, reposition it, and try again. If the DIMM module is seated correctly, the lever at the
end of the DIMM slot should be completely raised.
3. Reset the CUDA ( refer to CUDA Reset on page 4).
4. Replace the chassis cover ( refer to Chassis Cover Removal/Installation on page 6).
Figure 5: Installing RAM
CPU

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NN
NNoo oott ttee ee:::: All DIMMs must be 112-pin, fast-paged mode, 70-nanosecond access time or faster. The
PowerCenter has three VRAM DIMM slots near the front on the motherboard. If one VRAM
DIMMs is to be installed, it must be installed in the slot closest to the front of the logic board.
This gives a total of two megabytes of VRAM. Adding two VRAM DIMMs, providing three
megabytes of VRAM, is not a supported configuration. Adding three VRAM DIMMs to give a total
of four megabytes of VRAM is the next valid, supported configuration.
Removing VRAM
1. Remove the chassis cover (refer to Chassis Cover Removal/Installation on page 6).
2. Place the unit on its side with the MLB on the bottom and the open side facing up.
3. Locate the VRAM DIMM(s) you would like to remove (refer to MLB Diagram on page 5). Loosen the
desired DIMM module by reaching in and pushing down on the small lever at the end of the
DIMM slot. (see Figure 6 on page 11). The DIMM should pop loose from the slot at the lever end.
4. Grasp the DIMM module on each end and evenly pull the module up and out of the slot.
Installing VRAM
1. Hold the module (with the contacts down) with one hand at each end. Notice that there are two
notches in the contact edge of the DIMM module.
VRAM Removal/Installation
VRAM Removal/Installation
Figure 6
VRAM slot
location
Figure 7: Removing VRAM
VRAM Slots
CPU

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2. Lower the DIMM squarely into the slot so that the notches in the DIMM line up with the notches
in the slot. Slide the contacts straight into the slot and make sure the contacts are firmly seated.
(see Figure 8: Installing VRAM on page 12). When properly seated, the contacts on the bottom
should not be visible.
NN
NNoo oott ttee ee:::: DonÕt force the DIMM module into the slot; if the MLB starts bending significantly, pull the
DIMM out, reposition it, and try again. If the DIMM module is seated correctly, the lever at the
end of the DIMM slot should be completely raised.
3. Reset the CUDA (refer to CUDA Reset on page 4).
4. Replace the chassis cover (refer to Chassis Cover Removal/Installation on page 6).
Figure 8: Installing VRAM

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Removing the CPU
1. Remove the chassis cover (refer to Chassis Cover Removal/Installation on page 6).
2. Place the unit on its side with the MLB on the bottom and the open side facing up.
3. Disconnect the CPU fan from the connector on the main logic board.
4. Remove the fan assembly by sliding the entire assembly forward until it unlocks from the support
beam. Lift the assembly out of the machine and set it aside.
NN
NNoo oott ttee ee:::: The riser arm may be removed if necessary.
5. Place both hands on either side of the CPU card and lift up. Sometimes a gentle rocking motion
from end to end (not side to side) will make it easier to remove the CPU card.
Installing the CPU
1. Hold the CPU card (contacts facing down) with one hand at each end. Notice that there is a notch in
the contact edge of the CPU card.
CPU Removal/Installation
CPU Removal/Installation
Figure 9: CPU removal
CPU card
Fan assembly
Cache

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2. Lower the CPU card squarely into the slot so that the notch in the CPU card lines up with the
notch in the slot. Slide the contacts straight into the slot and make sure the contacts are firmly
seated. (see Figure 9: CPU removal on page 13). When properly seated, the contacts on the bottom
should not be visible.
NN
NNoo oott ttee ee:::: DonÕt force the CPU card into the slot; if the MLB starts bending significantly, pull the CPU card
out, reposition it, and try again.
3. Replace the CPU fan assembly by lining up the tab and sliding the entire assembly toward the
rear of the chassis.
4. Reconnect the CPU fan to the main logic board. Route the cable so it does not contact the chips
on the RAM DIMMs.
5. Reset the CUDA (refer to CUDA Reset on page 4).
6. Replace the chassis cover (refer to Chassis Cover Removal/Installation on page 6).
PCI Cards

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Removing the Cache
1. Remove the chassis cover. (refer to Chassis Cover Removal/Installation on page 6).
2. Place the unit on its side with the MLB on the bottom and the open side facing up.
3. Locate the cache card (refer to MLB Diagram on page 5).
NN
NNoo oott ttee ee:::: The level 2 cache is located between the CPU riser card and the front drive bay assembly. If you
believe that the area is too small to adequately grasp the cache card, remove the CPU riser before
removing the cache (refer to CPU Removal/Installation on page 13).
4. Place both hands on either side of the L2 cache card and lift up. Because the L2 cache is held in
by a tight pressure fit, sometimes a gentle rocking motion from end to end (not side to side)
will make it easier to remove the cache card.
Installing the Cache
1. Hold the L2 cache card (contacts facing down) with one hand at each end. Notice that there are
notches in the contact edge of the L2 cache card.
2. Lower the L2 cache card squarely into the slot so that the notches in the L2 cache card line up
with the notches in the slot. Slide the contacts straight into the slot and make sure the contacts
are firmly seated. When properly seated, the contacts on the bottom should not be visible.
NN
NNoo oott ttee ee:::: DonÕt force the L2 cache card into the slot; if the MLB starts bending significantly, pull the L2
cache card out, reposition it, and try again.
4. Reset the CUDA (refer to CUDA Reset on page 4).
5. Replace the chassis cover (refer to Chassis Cover Removal/Installation on page 6).
Cache Removal/Installation
Cache Removal/Installation

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NN
NNoo oott ttee ee:::: Before you install any expansion cards, be sure that the combined power consumption of the
expansion cards does not exceed the limits of the computer. Refer to the documentation that
came with the cards you are installing for their power consumption rating and to ÒPower
requirementsÓ in the UserÕs Guide for the power consumption limit for this computer.
Removing PCI Cards
1. Remove the chassis cover (refer to Chassis Cover Removal/Installation on page 6).
2. Place the unit on its side with the MLB on the bottom and the open side facing up.
3. Disconnect any cables that may be attached to the PCI card.
4. Remove the screw attaching the PCI card to the inside of the chassis.
5. Firmly grasp the PCI card and pull it straight out of the computer laterally. Be careful not to
damage any components that may be protruding through the I/O slot. Sometimes a gentle
rocking motion from end to end (not side to side) will make it easier to remove the PCI card.
Installing PCI Cards
1. Remove the chassis cover (refer to Chassis Cover Removal/Installation on page 6).
2. Remove the retaining screw of the metal I/O slot cover from the slot you wish to use. (see Figure
10: Removing PCI slot cover on page 17).
3. Pull the I/O slot cover out the side so that the tongue at the bottom of the cover slides out of the
slot in the chassis.
PCI Cards Removal/Installation
PCI Cards Removal/Installation
3.5-inch Drive

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4. Hold the PCI card (contacts facing down) with one hand at each end. Notice that there is a notch
in the contact edge of the PCI card.
5. Lower the PCI card squarely into the PCI riser card so that the notch in the PCI card lines up with
the notch in the PCI riser card. Slide the contacts straight into the PCI riser card and make sure
the contacts are firmly seated. (see Figure 11: PCI card installation on page 17). When properly
seated, the contacts on the bottom should not be visible. Secure the PCI card to the chassis with
the retaining screw.
NN
NNoo oott ttee ee:::: DonÕt force the PCI card into the slot; if the PCI riser card starts bending significantly, pull the
PCI card out, reposition it, and try again.
Slot cover screw
PCI slot cover
PCI slot
Figure 10: Removing PCI
slot cover
Figure 11: PCI card
installation
PCI card
Slot cover screw

CONFIDENTIAL 18
6. Connect any wires or cables to the PCI card necessary for its proper operation.
7. Reset the CUDA (refer to CUDA Reset on page 4).
8. Replace the chassis cover (refer to Chassis Cover Removal/Installation on page 6).

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Removing the PCI Riser Card
1. Remove the chassis cover (refer to Chassis Cover Removal/Installation on page 6).
2. Locate the riser card (refer to MLB Diagram on page 5).
3. Remove any installed PCI cards (refer to PCI Cards Removal/Installation on page 16).
4. Remove the two screws that secure the riser card to the crossbar.
5. Disconnect the power cable to the CPU cooling fan.
6. Remove the hex-head screw that secures the support beam to the rear of the chassis. Swing the
rear end of the crossbar up, then unhook it from the front of the chassis and remove it from the
computer.
7. Firmly grasp the PCI riser card and pull it straight out of the computer. Sometimes a gentle
rocking motion from end to end (not side to side) will make it easier to remove the PCI card.
PCI Riser Card Removal/Installation
PCI Riser Card Removal/Installation
Figure 11:
PCI Riser Card
removal

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Installing the PCI Riser Card
1. Lower the PCI riser card squarely into the PCI slot so that the notch in the PCI card lines up with the
notch in the PCI slot. Slide the contacts straight into the PCI slot and make sure the contacts are firmly
seated. When properly seated, the contacts on the bottom should not be visible.
2. Replace the support cross beam and its retaining screws.
3. Reconnect the power cable of the CPU cooling fan. Route the cable so it does not contact the
chips on the RAM DIMMs.
4. Replace the screws that attach the PCI riser card to the support beam.
5. Reset the CUDA (refer to CUDA Reset on page 4).
6. Install the chassis cover (refer to Chassis Cover Removal/Installation on page 6).
5.25-inch Drive