Power Computing Minitower 132, Minitower 150, Minitower 180, Minitower 166, PowerCenter 132 User Manual

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PowerCenter

PowerCenterª

Certification Module

PowerCenter Minitower 132/150/166/180

Table of Contents

PowerCenterª 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

Table of Contents

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

CONFIDENTIAL

PowerCenter NT Specifications

CPU

PowerPC 604 at 132, 150, 166 or 180MHz

PowerCenter LP Specifications

Main Logic Board

CPU Upgrade

MacOS

Memory

Cache

SCSI

Serial Ports

Network

Bus Expansion

Floppy Drive

512 KB Level 2

Available via daughtercard replacement

4 DIMM slotsÑ168-pin, 64 bit, 70 ns (512 Mb max); Memory interleaving not

Three PCI expansion slots

One 3.5-inch, 1.4MB floppy disk drive. Supports MacOS, Windows, DOS, OS/2

Catalyst (Comparable to a Macintosh 7200)

7.5.2, 7.5.3, 7.5.5, 7.6, 7.6.1

supported

SCSI-2; 5 MB/sec data transfer rate

High speed GeoPort-compatible 9-pin modem and printer ports

Built-in Ethernet AAUI port; Built-in Ethernet 10 Base-T port; LocalTalk serial connection via modem or printer port

and ProDOS disk formats.

Video

Audio

ROM

Case style

Drive Bays

Dimensions

Power Supply

Internal video with both Mac and SVGA connections

1MB VRAM built-in and upgradeable to 4MB max Optional high-quality accelerated video cards

16 bit, 44.1 KHz Stereo in/out connections (microphone port requires line-level input, such as AppleÕs Plaintalk Microphone); Built-in speaker

Removeable Apple ROM

Mini-tower

Three front accessible, full-height 5.25-inch drive bay; one internal 3.5-inch full height drive bay

7"(W) X 15"(H) X 16"(D); 22 lb (10.5 kg)

200W, 100V-240V (Domestic/International manual switching)

CONFIDENTIAL

For Your Safety

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.

NNNNoooottttee

: 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.

If you need further assistance, please call:

1-800-708-6227

CONFIDENTIAL

CUDA Reset

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

CUDA Reset

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

3. Touch the metal chassis of the machine. This will dissipate static electricity into ground.

4. Locate the CUDA Reset button (

5. Press the CUDA Reset button for a few seconds.

6. Reboot, and verify resolution of the problem you wanted to solve.

NNNNooootttteeee::

Resetting the CUDA will cause some system settings to default to factory settings.

(

refer to

Chassis Cover Removal/Installation

refer to

MLB Diagram

on page 5).

on page 6).

CONFIDENTIAL

MLB DIAGRAM

MLB Diagram

CONFIDENTIAL

Chassis Cover Removal/Installation

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.

Side Panel

Figure 1: Removing the chassis cover

thumb screws

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.

CONFIDENTIAL

Front Bezel Removal/Installation

Removing the Front Bezel Cover

Front Bezel

1. Remove the chassis cover

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 (

protective plate

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.

on page 7).

(

refer to

All of these screws must be removed before the front bezel can be

Chassis Cover Removal/Installation

on page 6).

see

Figure 2: Removing

retaiing screws

Figure 2: Removing protective plate

CONFIDENTIAL

retaiing screws

Figure 3: Removing retaining screws

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 (

CONFIDENTIAL

refer to

Chassis Cover Removal/Installation

on page 6).

NNNNooootttteeee::

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

RAM Removal/Installation

RAM

1. Remove the chassis cover (

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 (

module by reaching in and pushing down on the small lever at the end of the DIMM slot. (

Figure 4: Removing RAM

Figure 3: DIMM slot location

refer to

on page 9).

Chassis Cover Removal/Installation

on page 6).

see

Figure 3:

The DIMM should pop loose from the slot at the lever end.

DIMM Slots

on page 9).

Loosen the desired DIMM

see

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

CONFIDENTIAL

Figure 4: Removing RAM

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.

Figure 5: Installing RAM

NNNNooootttteeee::

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.

CPU

3. Reset the CUDA (

refer to

CUDA Reset

4. Replace the chassis cover (

refer to

on page 4).

Chassis Cover Removal/Installation

on page 6).

CONFIDENTIAL

VRAM Removal/Installation

NNNNooootttteeee::

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.

CPU

3. Locate the VRAM DIMM(s) you would like to remove ( 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.

Figure 6 VRAM slot location

4. Grasp the DIMM module on each end and evenly pull the module up and out of the slot.

refer to MLB Diagram on page 5). Loosen the

VRAM Slots

Figure 7: Removing VRAM

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.

CONFIDENTIAL

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.

Figure 8: Installing VRAM

NNNNooootttteeee::

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).

CONFIDENTIAL

CPU Removal/Installation

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.

NNNNooootttteeee::

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.

Cache

Fan assembly

Figure 9: CPU removal

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.

CONFIDENTIAL

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.

NNNNooootttteeee::

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.

PCI Cards

5. Reset the CUDA (

6. Replace the chassis cover (refer to Chassis Cover Removal/Installation on page 6).

refer to CUDA Reset on page 4).

CONFIDENTIAL

Cache Removal/Installation

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 (

NNNNooootttteeee::

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.

refer to MLB Diagram on page 5).

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.

NNNNooootttteeee::

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).

CONFIDENTIAL

PCI Cards Removal/Installation

NNNNooootttteeee::

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.

3.5-inch Drive

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.

CONFIDENTIAL

PCI slot

Figure 10: Removing PCI slot cover

Slot cover screw

PCI slot cover

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.

Figure 11: PCI card installation

Slot cover screw

NNNNooootttteeee::

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.

PCI card

CONFIDENTIAL

6. Connect any wires or cables to the PCI card necessary for its proper operation.

7. Reset the CUDA (

8. Replace the chassis cover (refer to Chassis Cover Removal/Installation on page 6).

refer to CUDA Reset on page 4).

CONFIDENTIAL

PCI Riser Card Removal/Installation

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.

Figure 11: PCI Riser Card removal

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.

CONFIDENTIAL

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.

5.25-inch Drive

5. Reset the CUDA (

6. Install the chassis cover (refer to Chassis Cover Removal/Installation on page 6).

refer to CUDA Reset on page 4).

CONFIDENTIAL

3.5-inch Drive Removal/Installation

Removing the 3.5-inch Drive

1. Remove the chassis cover (refer to Chassis Cover Removal/Installation on page 6).

2. Remove all cables from the drive.

3. Remove the four retaining screws securing the drive to the mounting bracket.

4. Lower the drive out of the bracket straight down and out of the bracket.

3.5-inch internal drive bay

Figure 11: Removing a

3.5-inch

Installing the 3.5-inch Drive

1. Place the drive in the mounting bracket.

2. Secure the drive to the bracket with four retaining screws.

3. Attach all necessary cables tothe drive.

4. Remove the chassis cover (

5. Reset the CUDA (

refer to CUDA Reset on page 4).

refer to Chassis Cover Removal/Installation on page 6).

6. Install the chassis cover (refer to Chassis Cover Removal/Installation on page 6).

CONFIDENTIAL

5.25-inch Drive Removal/Installation

Removing 5.25-inch Drives

1. Remove the chassis cover (refer to Chassis Cover Removal/Installation on page 6).

2. Disconnect all cables that are attached to the device being removed. (see Figure 12: CDROM

Removal on page 22).

Figure 12: CDROM Removal

Power Connector

Main Logic Board

Sound Connector

SCSI Connector

3. Remove the four screws securing the drive to the drive cage

4. Slide the drive forward out of the chassis.

Installing 5.25-inch Drives

1. Slide the drive half way into the front bay location, making sure the cable connections are facing the rear of the computer. Pushing the drive in only halfway makes cable connection easier by giving more maneauvering room behind the drive.

2. Connect the cables to the drive. Slide the drive in the rest of the way, making sure that the drive is flush with the front of the computer.

CONFIDENTIAL

Figure 13: Faceplate removal

Faceplate

3. Replace the screws that secure the drive.

4. Reset the CUDA (

refer to CUDA Reset on page 4).

5. Install the chassis cover (refer to Chassis Cover Removal/Installation on page 6).

CONFIDENTIAL

Floppy Disk Drive Removal/Installation

Removing the Floppy Disk Drive

1. Remove the chassis cover (refer to Chassis Cover Removal/Installation on page 6).

2. Disconnect the cable connected to the floppy disk drive.

3. Remove the two screws that secure the floppy disk drive cage to the 5.25-inch drive cage above it and the front of the chassis.

4. Slide the floppy disk drive cage toward the rear of the computer to unhook it from the 5.25-inch drive cage. Pull the floppy disk drive cage straight out the side of the computer

5. Remove the four screws that secure the floppy disk device to the mounting cage.

6. Slide the drive out of the mounting cage.

Power Supply

Floppy drive

Figure 14: Removing the floppy drive bayy

Installing the Floppy Disk Drive

1. Slide the drive into the drive cage and line up the drive with the holes on the drive cage.

2. Replace the four screws that secure the drive to the drive cage.

3. Align the tabs on the drive cage with the slots on the bottom of the 5.25-inch drive cage. Slide the floppy disk drive cage forward to hook it in place.

CONFIDENTIAL

4. Replace the screws that attach the floppy disk drive cage to the5.25-inch drive cage and the front of the chassis.

5. Reconnect the cable to the floppy disk drive.

6. Reset the CUDA (

7. Install the chassis cover (refer to Chassis Cover Removal/Installation on page 6).

refer to CUDA Reset on page 4).

CONFIDENTIAL

Removal/Installation of MLB

Removing the MLB (Main Logic Board)

1. Remove the chassis cover (refer to Chassis Cover Removal/Installation on page 6).

2. Place the computer on its side with the MLB on the bottom and the open side facing up.

3. Remove the base from the chassis. The base is retained with two screws on the back in the bottom center of the computer and one directly on the bottom of the computer. Slide the base toward the rear of the computer to remove it.

4. Remove the PCI card(s) (

5. Remove PCI card and assembly (refer to PCI Riser Card Removal/Installation on page 19).

6. Disconnect the fan wire from the main logic board before removing the fan and crossbar.

7. Remove the CPU card (

8. Remove the cache card (refer to Removing the Cache on page 15).

9. Remove the VRAM (refer to VRAM Removal/Installation on page 11).

10. Remove the RAM (refer to RAM Removal/Installation on page 9).

11. Disconnect the cables attached to the MLB. Disconnect the power cable by pressing the retaining clip facing the front of the computer, then pulling straight up. Disconnect all other cables by pulling them straight up from their sockets.

12. Remove the eight screws that secure the logic board to the chassis.

13. Lift the edge of the MLB closest to the bezel and slide the MLB out of the chassis at an angle.

refer to Removing PCI Cards on page 16).

refer to Removing the CPU on page 13).

CONFIDENTIAL

Figure 16: Main logic board removal

Retaining screws

Installing the MLB

1. Lower the MLB into the chassis at an angle. Lay the board flat and align the mounting holes with the

posts.

2. Replace the eight screws that secure the MLB to the chassis.

3. Reconnect the cables attached to the MLB. Connect the power cable by pressing the retaining clip facing the front of the computer, then pressing down. Connect all remaining cables to their connectors.

NNNNooootttteeee::

If the cable does not have a directional connector, then connect it with the label on the cable

connector facing the rear of the computer.

4. Install the RAM (refer to RAM Removal/Installation on page 9).

5. Install the VRAM (refer to VRAM Removal/Installation on page 11).

6. Install the Cache card (refer to Installing the Cache on page 15).

7. Install the CPU (refer to Installing the CPU on page 13).

8. Install the PCI Riser card and assembly (refer to PCI Riser Card Removal/Installation on page 19).

9. Install the PCI card(s) (refer to PCI Cards Removal/Installation on page 16).

10. Replace the base. The base is retained with two screws on the back in the bottom center of the computer and one directly on the bottom of the computer. Slide the base toward the front of the

CONFIDENTIAL

computer to move into place.

11. Reset the CUDA (

12. Install the chassis cover. (refer to Chassis Cover Removal/Installation on page 6).

refer to CUDA Reset on page 4).

CONFIDENTIAL

Removal/Installation of Power Supply

Removing the Power Supply

1. Remove the chassis cover. (refer to Chassis Cover Removal/Installation on page 6).

2. Disconnect the logic board power connector from the MLB. The connectors will have red, white, blue, and black wires coming out of them that lead back to the power supply (

Diagram on page 5).

straight up.

3. Remove the power connectors from all internal SCSI devices. These connectors are approximately one inch long with translucent white plugs with black, blue, yellow, red, and orange wires which lead back to the power supply.

4. Remove the four chassis retaining screws that hold the power supply in place. These screws are located on the outside rear of the computer, surrounding the power supply cooling fan.

¥ the first screw is located above and to the left on the chassis ¥ the second screw is located below and to the left on the chassis ¥ the third screw is located above and to the right on the chassis ¥ the fourth screwis located below and right on the chassis

Disconnect the power cable by pressing in on the retaining clip and pulling

refer to MLB

CCCCAAAAUUUUTTTTIIIIOOOONNNN!!!!::

5. Pull the power supply directly up and out of the chassis.

Figure 17: Power supply removal

Retaining screws

Do not remove any screws unless you are sure that they are chassis retaining screws.

There are retaining screws that hold the power supply components together as well. These screws must not be removed.

CONFIDENTIAL

Installing Power Supply

1. Slide the power supply into place, making sure that it is seated properly.

2. Secure the power supply with the four retaining screws on the back of the chassis.

3. Connect the power connectors to all internal SCSI devices.

4. Connect the logic board power connector to the MLB.

5. Reset the CUDA. (

6. Install the chassis cover (refer to Chassis Cover Removal/Installation on page 6).

refer to CUDA Reset on page 4).

CONFIDENTIAL

This module was written and designed by: Michael Scott Clay.

Additional contributions by: Shane Nestle Jeff Pryor

Edited by Mark Wood Laurie Veatch

This Power Computing module was written, edited and produced on a desktop publishing system using Power Computing system that use the Mac OS.

Every effort has been made to ensure that the informationin the module is accurate. Power Computing is not responsible for printing or clerical errors.

Mention of third-party products is for informational purposes only and constitutes neither an endorsement nor a recommendation. Power Computing no responsibility with regard to the performance or use of these products.

Power Computing Corporation 2400 S. IH-35 Round Rock, Texas 78681-7903

CONFIDENTIAL

Power Computing Minitower 132, Minitower 150, Minitower 180, Minitower 166, PowerCenter 132 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual