Apple Power Macintosh G3 Especificações

Service Source K Power Macintosh G3All-In-One

Basics Sound - 8 Sound The sound system for the Power Macintosh G3 computers is implemented entirely on the I/O card. Each supports 16-bit stereo so

Take Apart Chassis w/ Cables - 58Chassis w/ CablesBefore you begin do the following: • Remove the chassis carrier• Remove the top, side, and rear hou

Take Apart Chassis w/ Cables - 59• Remove Tilt /Swivel BaseThe chassis and three cables remain. The chassis with cables is part number 922-3489. Note

Take Apart Processor Module - 60Processor ModuleBefore you begin, do the following:• Remove the chassis carrier• Remove I/O card• Remove cable clamp

Take Apart Processor Module - 611 Remove the screw that holds the processor module wire to the logic board.Replacement Note: The processor module wir

Take Apart Processor Module - 62Warning: the heat sink may be hot to the touch.2 While pressing down on the top of the clip that secures the heatsink

Take Apart Processor Module - 633 Lift up the clip and remove it from the heatsink.

Take Apart Processor Module - 644 Lift up the heatsink to remove it from the processor module.

Take Apart Processor Module - 655 Lift the metal lever at the left of the processor module.

Take Apart Processor Module - 666 Pick up the processor module by the edges and gently lift straight up to remove it. Be careful not to bend the pins

Take Apart Processor Module - 677 Remove the warranty sticker and red jumper block located next to the battery if replacing the logic board only.IMPO

Basics Sound - 9 The Power Macintosh G3 also records sound from several sources: • A microphone connected to the line-level sound input jack• A comp

Take Apart Processor Module - 688 The graphic at left shows the proper installation for the processor module jumper. Depending on the unit, you will

Take Apart Processor Module - 69Replacement Note: Position the processor module evenly over the processor module slot and make sure the card is seate

Take Apart Front Door - 70Front DoorThere are no first remove procedures for the font door.

Take Apart Front Door - 711 Pull down on the bottom tab while at the same time gently pry the side slot with a screwdriver to release the front door.

Take Apart Housing - 72HousingBefore you begin, do the following:• Remove the chassis carrier• Remove the front door

Take Apart Housing - 731 Remove the four screws on the CRT bezel to release the housing from the CRT bezel.

Take Apart Housing - 742 Remove the two plastic plugs covering the top panel housing screws.3 Remove the two screws.

Take Apart Housing - 754 Pull housing back and lift housing off computer.Note: The housing is removed as one unit, but separates into four parts: the

Take Apart Housing - 76Note: This picture is a view looking inside the housing. 5 Remove screws (10) to separate housing into individual panels.

Take Apart Tilt/Swivel Base - 77Tilt/Swivel BaseBefore you begin, do the following:• Remove the front door• Remove the CRT bezel• Remove the housing

Basics Sound - 10 Sound Output All sound output features for the Power Macintosh G3 computer are provided by the I/O card. The I/O card provides one

Service Source K Troubleshooting Power Macintosh G3All-In-One

Troubleshooting General/ - 1 General The Symptom Charts included in this chapter will help you diagnose specific symptoms related to your product. B

Troubleshooting New Components Theory of Operation/Voltage Regulator - 2 New Components Theory of Operation New components on the Power Macintosh G3

Troubleshooting New Components Theory of Operation/Processor Module - 3 Processor Module The Power Macintosh G3 logic board comes with a removable p

Troubleshooting New Components Theory of Operation/Jumper Location J16 - 4 Jumper Location J16 The jumper block you place at location J16 configures

Troubleshooting New Components Theory of Operation/Jumper Location J28 - 5 Jumper Location J28 Jumper location J28 controls which power supply the P

Troubleshooting New Components Theory of Operation/I/O Cards - 6 I/O Cards Power Macintosh G3 computers require an I/O card that moves audio and/or

Troubleshooting Cleaning Procedure for Card Connectors/I/O Cards - 7 Cleaning Procedure for Card Connectors It is possible for residue to build up o

Troubleshooting Symptom Charts/System - 8 Symptom Charts System Fan is running, but no startup chime, screen is black, drive not accessed at startup

Troubleshooting Symptom Charts/System - 9 Fan is running, LED is on, drive is accessed at startup, but no startup chime and screen is black1 Check j

Basics Sound - 11 Sound Input The I/O card provides a stereo sound input jack on the back of the enclosure for connecting an external Apple PlainTal

Troubleshooting Symptom Charts/System - 10 chapter for more information). 7 Check jumper block configuration at J16. Make sure jumper block is corre

Troubleshooting Symptom Charts/System - 11 3 Replace power supply.4 Replace analog board.5 Replace processor module.6 Replace logic board. 7 Replace

Troubleshooting Symptom Charts/System - 12 7 Replace power supply.8 Replace logic board.9 Replace processor module.System intermittently crashes or

Troubleshooting Symptom Charts/System - 13 During startup, following message is displayed, "This startup disk will not work on this Macintosh m

Troubleshooting Symptom Charts/Error Chords - 14 Error Chords One-part error chord sounds during startup sequence1 Disconnect IDE data cable from ha

Troubleshooting Symptom Charts/Video - 15 Video Screen is black or green, but boot tone is present, drive operates, fan is running, and LED is lit1

Troubleshooting Symptom Charts/Video - 16 time to test. Replace any bad DIMMs.11 Replace logic board.12 Replace processor module.Screen is black or

Troubleshooting Symptom Charts/Video - 17 10 Replace power supply.11 Replace processor module.Boot tone is present and screen lights up, but nothing

Troubleshooting Symptom Charts/Video - 18 Predominant color tint 1 Perform video adjustments. (Refer to “Video” in the Adjustments chapter.)2 Check

Troubleshooting Symptom Charts/Floppy Drive - 19 Floppy Drive Internal floppy drive does not operate1 Replace floppy disk with known-good disk.2 Rep

Basics Sound - 12 • Sound record with playthrough—input sound is recorded and also sent to the speakers and sound output jacks.

Troubleshooting Symptom Charts/Floppy Drive - 20 4 Replace logic board. 5 Replace processor module.Drive attempts to eject disk, but doesn’t1 Reseat

Troubleshooting Symptom Charts/Hard Drive - 21 Hard Drive Single internal hard drive does not operate; drive doesn’t spin1 Replace hard drive power

Troubleshooting Symptom Charts/Hard Drive - 22 Works with internal or external SCSI devices but not with both1 Verify there are no duplicate SCSI de

Troubleshooting Symptom Charts/Peripherals - 23 Peripherals Cursor does not move 1 Check mouse connection.2 Inspect inside of mouse for buildup of d

Troubleshooting Symptom Charts/Peripherals - 24 Double-click doesn’t open application, disk, or server1 Remove duplicate system folders.2 Clear para

Troubleshooting Symptom Charts/Peripherals - 25 Known-good serial printer does not work1 Verify you have correct version of system software.2 Verify

Troubleshooting Symptom Charts/CD-ROM Drive - 26 CD-ROM Drive CD-ROM drive does not work1 Try using known-good compact disc.2 Replace CD-ROM drive m

Troubleshooting Symptom Charts/Miscellaneous - 27 Miscellaneous No sound from speaker1 Disconnect any microphones or external speakers.2 Verify that

Service Source K Adjustments Power Macintosh G3All-in-One

Adjustments Light Meter Setup - 1 Light Meter Setup This topic covers setup for three light meter models: R77, L-248, and 246. Model R77 (Apple part

Basics PowerPC G3 and Backside Cache - 13 PowerPC G3 and Backside Cache Backside cache is a significant architectural design change from earlier Pow

Adjustments Light Meter Setup - 2 Three scales are shown on the light meter:• 200-1000 fc• 50-250 fc• 10-50 fcBecause display screen luminance typic

Adjustments Light Meter Setup - 3 To measure a display screen’s luminance,1 Set the scale switch to the bottom position (to set up the 10-50 fc scal

Adjustments Light Meter Setup - 4 Important: If you suspect the light meter is giving false readings, verify the readings with a known-good light

Adjustments Light Meter Setup - 5 Model L-248 1 Press the red button on the back of the light meter. If the reading is out of the red area, replace

Adjustments Light Meter Setup - 6 Model 246 This topic covers setup for light meter Model 246.1 Remove the metal slide, if installed, from the top o

Adjustments Geometry - 7 Geometry The Geometry adjustments shown are controlled via the Display Adjustment Utility. 1 Using the Display Adjustment U

Adjustments Geometry - 8 Saving Geometry Settings for Multiple Resolutions • Important: In order to save a set of adjustments for a specific resol

Adjustments Geometry - 9 Using Monitors & Sound Control Panel To use the Monitors & Sound control panel, select Control Panels from the Appl

Adjustments Video - 10 Video Use the Display Adjustment Utility version 2.0 and the Display Service Utility version 4.2.1 to perform the Cutoff and

Adjustments Video - 11 Cutoff Note: Perform the cutoff adjustment prior to adjusting the white balance. Make sure the monitor has been on for at l

Basics SDRAM DIMMs - 14 PowerPC G3, and a 2.5 L2 bus ratio, the backside cache bus speed will be 100MHz, twice the speed of the system bus. SDRAM D

Adjustments Video - 12 3 Using the Display Adjustment Utility, move the Sub Contrast and Sub Brightness controls to midrange. Important: The Displ

Adjustments Video - 13 4 Using the Display Adjustment Utility Color window, set the drive and cutoff controls to their midpoint positions. Note: Y

Adjustments Video - 14 5 Run the Display Service Utility to display the Gray Bar Test pattern. Note: This procedure should be performed in a dimly

Adjustments Video - 15 6 Look at the Gray Bar Test pattern. • the bars should have no predominant color• the leftmost bar should be as black as the

Adjustments Video - 16 7 Using the Display Adjustment Utility, adjust the red, green, and blue cutoff controls together until the second bar (from t

Adjustments Video - 17 8 Check the Gray Bar test pattern. If there is a predominant color in the three gray bars (on the left), adjust the color acc

Adjustments Video - 18 9 The cutoff is now set correctly. You should see shades of black and gray and the second bar (from the left) is barely visib

Adjustments Video - 19 White Balance Note: Make sure the cutoff is set correctly before you proceed and that the monitor has been on for at least

Adjustments Video - 20 2 Hold a light meter on the white bar (last bar on the right). Adjust the red, green, and blue drive controls until the light

Adjustments Video - 21 Important: If a predominant color is displayed in the three left gray bars, adjust the cutoff controls until you see no pre

Basics SDRAM DIMMs - 15 The DRAM DIMMs can be installed one or more at a time. The logic board supports only linear memory organization. Therefore,

Adjustments Video - 22 3 Using the Display Service Utility, display the All-White screen test. Hold a light meter or photometer against the center o

Adjustments Video - 23 Note: You may have to adjust the contrast a bit to raise the overall luminance.• 25 fL (foot lamberts) on a photometer

Adjustments Video - 24 4 Using the Display Adjustment Utility, Color window, adjust the Sub Contrast slider to increase the screen brightness until

Adjustments Focus - 25 Focus 1 Run Display Service Utility to display the Focus test pattern.2 Using a flat-head plastic adjustment tool, adjust the

Adjustments Display Adjustment Utility v. 2.0 Read Me File - 26 Display Adjustment Utilityv. 2.0 Read Me File Use the Display Adjustment Utility to

Adjustments Display Adjustment Utility v. 2.0 Read Me File - 27 Geometry Adjustments Save button - Clicking this button saves the adjustments you h

Adjustments Display Adjustment Utility v. 2.0 Read Me File - 28 Revert - Clicking this button restores the display to the last set of saved geometr

Adjustments Display Adjustment Utility v. 2.0 Read Me File - 29 adjustments that were made for the current resolution) and the machine will be resta

Take Apart Tilt/Swivel Base - 781 Remove two screws.2 Slide tilt/swivel base up and off the unit.

Service Source K Upgrades Power Macintosh G3All-In-One

Basics SGRAM Video Memory - 16 SGRAM Video Memory The Power Macintosh G3 logic board comes with 2 MB of Synchronous Graphic RAM (SGRAM) video memory

Upgrades PCI or I/O Cards - 1 PCI or I/O Cards Before you begin, remove the chassis carrier.1 Remove the screw that holds the port access cover in p

Upgrades PCI or I/O Cards - 2 3 Align the card connector with the expansion slot and press straight down until the connector inserts all the way int

Upgrades Memory—DRAM or VRAM - 3 Memory—DRAM or VRAM Before you begin, remove the• Chassis carrier• Cable clamp support bracket.ROM Slot(Do not remo

Upgrades Memory—DRAM or VRAM - 4 DRAM Note: DIMM shape and components may vary.1 To remove existing DRAM DIMMs to make room for new ones, push dow

Upgrades Memory—DRAM or VRAM - 5 2 Align DIMM notches with DRAM slot ribs. Note: The DIMM is designed to fit in the slot only one way.3 With eject

Upgrades Memory—DRAM or VRAM - 6 VRAM Note: SGRAM DIMM shape and components may vary.1 To remove existing SGRAM DIMM, spread arms of video memory

Service Source K Additional Procedures Power Macintosh G3All-in-One

Additional Procedures Adding a Zip Drive - 1 Adding a Zip Drive There may be requests to add a zip drive to a Power Mac G3 All-in-one computer. So

Additional Procedures Adding a Zip Drive - 2 Before you begin, remove the chassis carrier (see the Take-Apart procedures).1 Pull up on the release t

Additional Procedures Adding a Zip Drive - 3 2 Flip the carrier over and remove the two screws that hold the Zip bracket on the carrier.3 Screw the

Basics DIMM Slots - 17 DIMM Slots ROM Slot(Do not remove the ROM DIMM.)DRAM DIMM SlotsVideo Memory Expansion SlotSGRAM SO-DIMM

Service Source K Exploded View Power Macintosh G3All-In-One

Exploded View 2Processor Module661-1460 (233)661-1461 (266)076-0715Heat Sink Kit 233 & 266 MHz922-3491 Insulator,LB922-3490 Cable Support Brack

Exploded View 3Power Macintosh G3 (All-in-One) EV 2- Carrier Chassis & Main Chassis Cables922-2663Cable, CD-ROMAudio, IDE, 4-Pin922-3483Zip Pow

Exploded View 4(922-3538) Housing Panel Screws (10)(922-3546) I/O Door (Bottom Drawer) (2)0118385878316516716916111613161516116132332532732932113

Service Source K Basics Power Macintosh G3All-In-One

Basics - 18 Peripheral Component Interconnect (PCI) The Peripheral component Interconnect (PCI) expansion slots accept 7-inch PCI cards. Install on

Basics Internal Locator - 19 Internal Locator Zip Drive Floppy DriveCD-ROM DriveLogic BoardHard DriveVideo BoardPower SupplyAnalog Board

Basics Rear View - 20 Rear ViewSound Input PortSCSIPort Apple Desktop Bus(ADB)Port Sound Output PortInternal Modem CardPortPrinter&External mod

Basics Optional AV Card - 21 Optional AV CardSound Input PortOptional AV portsS-Video Ports(OUT and IN)Composite Video Ports(OUT and IN)Audio Input

Basics Logic Board - 22 Logic BoardPCISlotsBatteryROMDIMMPERCHSlotInternal SCSIConnectorSpeakerCD AudioFloppy DriveConnectorPower SupplyConnectorVol

Basics Repair Strategy - 23 Repair Strategy Service the Power Macintosh G3 computers through module exchange and parts replacement. Customers can re

Basics Repair Strategy - 24 Large businesses, universities, and K-12 accounts must provide a purchase order on all transactions, including orders pl

Basics Repair Strategy - 25 Canadian Ordering Canadian Service providers not enrolled in ARIS may fax their orders to Service Provider Support in Ca

Basics Warranty/AppleCare/ARIS - 26 Warranty/AppleCare/ARIS US Only The Power Macintosh G3 computers are covered under the Apple One-Year Limited W

Service Source K Specifications Power Macintosh G3 All-in-One

Basics Overview - 1 Overview Introducing the Power Macintosh G3 All-In-One design. • The new all-in-one is designed for education and fulfills all t

Specifications Introduction - 1 Introduction Specifications information for this product can be found in this chapter and also in the Spec Database,

Specifications Processor - 2 Processor CPU PowerPC G3 RISC microprocessor running at 233 or 266 MHzBuilt-in FPURequires system software version 8.1

Specifications Memory - 3 Memory SDRAM 32 MB standard, expandable to 384 MBUses 168-pin, 64-bit, 10 ns, 100 MHz unbuffered synchronous dynamic acces

Specifications I/O Interfaces - 4 I/O Interfaces SCSI Port External SCSI connector is 25-pin D-type connector. Supports up to seven SCSI devices. Se

Specifications I/O Interfaces - 5 Expansion Three internal expansion slots, supporting 7-inch PCI expansion cards, compatible with all PCI 2.1 speci

Specifications I/O Devices - 6 I/O Devices Keyboard AppleDesign Keyboard Mouse ADB Mouse II Microphone Apple internal microphone standard

Specifications Disk Storage - 7 Disk Storage Hard Drive 2 GB or 4 GB internal ATA hard drive6 GB internal on build-to-order systems Floppy Drive One

Specifications Video - 8 Video Built-in Video Display Multi-scan, tilt-and-swivel color display: 15-inch (13.8 inch diagonal viewable image size), .

Specifications I/O Cards - 9 I/O Cards PERCH Slot The PERCH slot connector is a 182-pin microchannel connector that supports the Apple I/O cards. No

Specifications Electrical - 10 Electrical Line Voltage 90–264 V AC, rms, single phase Frequency 50–60 Hz Maximum Power 300 W maximum continuous

Basics Overview - 2 Features of the Power Macintosh G3 All-In-One include • PowerPC G3 microprocessor running at 233 MHz or 266 MHz• RAM expandable

Specifications Physical - 11 Physical Dimensions Height: 19.92 in. (498 mm) Width: 16.08 in. (402 mm) Depth: 18.00 in. (450 mm) Weight: 59.5 lb. (27

Specifications Environmental - 12 Environmental Operating Temperature 50 to 104° F (10 to 40° C) Storage Temperature -40 to 116° F (-40 to 47° C) Re

Service Source K Take Apart Power Macintosh G3All-In-One

Take Apart Chassis Carrier - 1 Chassis Carrier No preliminary steps are required before you begin this procedure.1 Loosen the four screws.2 Pull the

Take Apart Chassis Carrier - 2 3 Disconnect the front control panel cable, RGB cable, main power cable, and HDA power cable.

Take Apart Chassis Carrier - 3 4 Press up on the tabs to release the chassis carrier.5 Pull chassis carrier out of unit. Note : See graphic on next

Take Apart Chassis Carrier - 4 Note: Graphic illustrates modules and support bracket located in chassis carrier.

Take Apart Hard Drive - 5 Hard Drive Before you begin, remove the chassis carrier.

Take Apart Hard Drive - 6 1 Disconnect the hard drive data cable and the power cable from the back of the hard drive.

Take Apart Hard Drive - 7 2 Pull up the release latch and slide the hard drive forward to remove it from the internal chassis. Note: Be sure to rem

Basics Overview - 3 • One ADB port• Three PCI expansion slots to accept • three 7-inch PCI cards, or • three 15 W cards, or • two 25 W cards, or• on

Take Apart Floppy Drive - 8 Floppy Drive Before you begin, remove the chassis carrier.

Take Apart Floppy Drive - 9 1 Pull up the release latch, and slide the floppy drive forward enough to reach the floppy cable.2 Disconnect the cable

Take Apart Zip Drive - 10 Zip Drive Before you begin, remove the chassis carrier.

Take Apart Zip Drive - 11 1 Pull up the release latch, and slide the Zip drive forward enough to reach the cables.2 Disconnect the SCSI and Zip powe

Take Apart Adding a Zip Drive - 12 Adding a Zip Drive There may be requests to add a zip drive to a Power Mac G3 All-in-one computer. Some prebuilt

Take Apart CD-ROM - 13 CD-ROM Before you begin, remove the chassis carrier.08

Take Apart CD-ROM - 14 1 Position the chassis carrier on its side.2 Disconnect the CD-ROM power cable, CD-ROM SCSI cable, and CD-ROM audio cable fro

Take Apart CD-ROM - 15 3 Pull down on the plastic frame while squeezing the latch. Slide the CD-ROM drive forward to remove it from the unit. Note:

Take Apart CD-ROM - 16 Replacement Note: If you removed the CD-ROM cables from the chassis you will need to reposition them before connecting the C

Take Apart I/O Card - 17 I/O Card Before you begin, remove the chassis carrier.

Basics Overview - 4 Optional Build-to-Order Power Mac All-In-One Features: • 100 MB SCSI Iomega Zip drive in the expansion bay• 6 GB hard drive• 64

Take Apart I/O Card - 18 1 Disconnect cables on the I/O Card.2 Remove two screws that secure card to chassis. Note: Be careful of the voltage regul

Take Apart I/O Card - 19 3 Remove external I/O screw on chassis.

Take Apart I/O Card - 20 4 Gently rock the I/O card out of the socket.5 Remove card from logic board. Replacement Note: Line up back end (end neare

Take Apart Cable Support Bracket - 21 Cable Support Bracket Before you begin remove the chassis carrier.

Take Apart Cable Support Bracket - 22 1 Disconnect the SCSI cable and the two IDE cables on the logic board.

Take Apart Cable Support Bracket - 23 2 Remove screw on cable support bracket.3 Open white plastic cable retainer and remove gray cables from the su

Take Apart Logic Board - 24 Logic Board Before you begin do the following: • Remove the chassis carrier• Remove I/O card• Disconnect the SCSI and I

Take Apart Logic Board - 25 1 Disconnect the floppy drive cable.2 Pull the Zip drive out a bit to disconnect the Zip drive power cable.3 Disconnect

Take Apart Logic Board - 26 4 Remove the two silver screws. Note : Do not remove ground wire from the heatsink.

Take Apart Logic Board - 27 5 Gently lift the logic board out of the chassis carrier. Replacement Note: This logic board requires that jumper J28

Basics The Cuda Chip - 5 The Cuda Chip The Cuda is a microcontroller chip. Its function is to • Turn system power on and off• Manage system resets f

Take Apart CRT EMI Shield - 28 CRT EMI Shield ± Warning: This product contains high voltage and a high-vacuum picture tube. To prevent serious in

Take Apart CRT EMI Shield - 29 1 Remove the six screws on the EMI Shield. Note : The EMI shield has sharp edges. Be careful not to cut yourself.

Take Apart CRT EMI Shield - 30 2 Lift the shield up, releasing the shield from the metal tabs on the chassis.3 Remove the shield from the unit. Repl

Take Apart Power Supply - 31 Power Supply Before you begin do the following: • Remove the chassis carrier• Remove the top, side, and rear panel hous

Take Apart Power Supply - 32 1 Push tab in.2 Lift and pull the power supply up to clear the pegs from the chassis holes. Note : The cables are still

Take Apart Power Supply - 33 3 Disconnect the multi-colored power cable (P904),the ground wire (P911), and the 2-pin brown wire (TH901), from the

Take Apart Power Supply - 34 4 Tilting the power supply off to the side, disconnect the remaining cables on the power supply board:• P912 • P905• P9

Take Apart Power Supply - 35 Replacement Note : Some connectors are impossible to reconnect when the board is in place. Before inserting the power s

Take Apart Power Supply - 36 Additional cable descriptions: P912 : Thermistor cable: a 2-wire gray & brown cable that connects to the brown conn

Take Apart Analog/Video Board - 37 Analog/Video Board Before you begin do the following: • Remove the chassis carrier• Remove the top, side, and rea

Basics Resetting the Logic Board - 6 Resetting the Logic Board Resetting the logic board can resolve many system problems (refer to “Symptom Charts”

Take Apart Analog/Video Board - 38 1 Disconnect the microphone (P703), ground wire (P702), degaussing wire (P508), and the yoke wire (P701).

Take Apart Analog/Video Board - 39 2 Gently remove the CRT video board.3 Push in tab and lift analog board out of chassis holes.

Take Apart Analog/Video Board - 40 4 Disconnect P502, P503, P507, P506, and P505. Important : P502, P503, P507, and P506 have clamped (or locking) c

Take Apart Analog/Video Board - 41 On the analog board:• P502 connects to P305 on the CRT video board• P503 connects to P906 on power supply• P505 c

Take Apart CRT Bezel - 42 CRT Bezel Before you begin, remove the following:• Top, side, and rear panel housing.• Front door

Take Apart CRT Bezel - 43 1 Remove the two silver torx screws located on each side of the CRT.2 Disconnect the microphone cable (P11) from the micro

Take Apart Speakers - 44 Speakers Before you begin do the following: • Remove the top, side, and rear panel housing • Front door• CRT Bezel• Front p

Take Apart Speakers - 45 1 Remove speaker screw.2 Speaker cable should be disconnected from sound board; gently pull speaker cable out from undernea

Take Apart Front Panel Board - 46 Front Panel Board Before you begin do the following: • Remove the top, side and rear panel housing• Front door• CR

Take Apart Front Panel Board - 47 2 Pull front panel board forward to disconnect the three cables and ribbon connector. 3 Remove front panel board

Basics Resetting the Logic Board - 7 6 Reassemble the computer and test the unit. Note: This procedure resets the computer’s PRAM. Be sure to check

Take Apart CRT - 48CRT±Warning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in

Take Apart CRT - 49• Remove the analog board• Remove the power supply• Remove the front door• Remove the CRT bezel• Remove front panel board

Take Apart CRT - 501 Remove the screws that secure the clips.2 Remove clips.

Take Apart CRT - 513 Remove two screws that secure the CRT frame to the main chassis.

Take Apart CRT - 524 Securely hold CRT and lift CRT off the chassis.

Take Apart CRT - 53Replacement Note: Position bottom of CRT so the CRT frame connects with the four chassis catches under the front of the CRT.Contin

Take Apart Fan - 54FanBefore you begin, do the following: • Remove the chassis carrier.• Remove the top, side, and rear panel housing.• Remove the CR

Take Apart Fan - 551 Position hand inside chassis to catch fan as it drops down when the two fan screws are removed.2 Remove fan from chassis.

Take Apart Thermistor - 56ThermistorBefore you begin, do the following: • Remove the chassis carrier.• Remove the top, side, and rear panel housing.•

Take Apart Thermistor - 571 Remove screw on thermistor bracket.2 Remove bracket; remove thermistor.