K Service Source Power Macintosh 4400 Power Macintosh 4400/200 and 4400/200 PC Far East: Power Macintosh 7220/200 and 7220/200 PC Europe Only: Power Macintosh 4400/160
K Service Source Basics Power Macintosh 4400
Basics System Overview - 1 System Overview The Power Macintosh 4400 is an entry-level computer with a PowerPC 603e processor. The adapter card in the 4400/160 allows installing three PCI cards. In later models the adapter card allows installing one communications card and two PCI cards. The computer can be turned on or off from the keyboard and from the power button. A voltage switch allows manual selection of two settings for voltage ranges of 100–130V or 200–230V.
Basics Power Macintosh 4400/200, 7220/200 - 2 Power Macintosh 4400/200, 7220/200 The Power Macintosh 4400/200 will be sold worldwide. In the Far East, it will be named 7220/200.
Basics Voltage Switch - 3 Voltage Switch Voltage Switch The voltage switch must be set correctly to avoid damaging the computer. Insert a screw driver in the slot to set the switch to show “115” for voltages between 100 and 130. Set the switch to show “230” for voltages between 200 and 230. Some countries use two standardized voltages. If you aren’t sure which voltage is available, check with the electricity supply company before plugging in the computer.
Basics Voltage Switch - 4 Here is a table listing voltages for some countries: Country Voltage Japan 100 Jamaica, Taiwan 110 South Korea Peru Brazil, Lebanon Philippines 100 or 220 110 or 220 110–220 115 Bermuda, Canada, Puerto Rico, United States, Venezuela 120 Saudi Arabia 127 or 220 Mexico Hong Kong 127 200
Basics Voltage Switch - 5 Country Voltage India, South Africa 220-250 Australia, Kuwait, Malta, New Zealand, Northern Ireland, Papua New Guinea, Oman, Qatar, United Kingdom 240 Bahrain, Chile, China (People’s Republic), Czechoslovakia, Egypt, Greenland, Hungary, Iceland, Indonesia, Iran, Jordan, Liechtenstein, Nepal, Paraguay, Poland, Romania, United Arab Emirates, Russia and the Commonwealth of Independent States (CIS), Yemen, Yugoslavia 220 Israel, Pakistan, Singapore Austria, Belgium, Denmark,
Basics Voltage Switch - 6 Caution: Setting the correct voltage for the computer does not set the voltage for the monitor. To protect the monitor, be sure to use the appropriate adapter or voltage converter, if one is necessary.
Basics Key Commands - 7 Key Commands Since there are no programmer’s switches on the Power Macintosh 4400, the reset and interrupt functions require pressing key combinations. There are two power buttons on the 4400, one on the keyboard and one on the front of the computer (see the Front View diagram later in this chapter). The keyboard power key is identified by a triangle imprinted on it.
Basics CD-ROM and Hard Drive Interface - 8 CD-ROM and Hard Drive Interface The internal hard drive uses intelligent device electronics (IDE) technology, commonly used in DOS-compatible systems. The IDE drive uses the standard advanced technology attachment (ATA) or IDE interface. The IDE hard drive functions the same as a typical SCSI hard drive. You must replace IDE drives like for like. The IDE drive does not affect SCSI ID selections or SCSI termination schemes.
Basics Peripheral Component Interconnect (PCI) Technology - 9 Peripheral Component Interconnect (PCI) Technology The Power Macintosh 4400 offers peripheral component interconnect (PCI) expansion. Because the PCI bus is an industry standard, most existing PCI 2.0-compliant cards (with the addition of a Macintosh OS-specific software driver) will work in these computers. PCI offers significantly higher performance than the NuBus architecture used in previous Macintosh models.
Basics Peripheral Component Interconnect (PCI) Technology - 10 Note: The Power Macintosh PCI adapter card expansion slots are compatible with all PCI 2.0 specification-compliant cards with the addition of a Macintosh-OS-specific software driver. Nubus cards cannot be used in these expansion slots.
Basics Dual In-Line Memory Modules (DIMMs) - 11 Dual In-Line Memory Modules (DIMMs) The Power Macintosh 4400 uses DRAM on dual in-line memory modules (DIMMs). Three slots allow for memory expansion up to 96 MB using 3.3 V unbuffered 8-byte extended data output (EDO) JEDEC-standard 168-pin DRAM DIMM cards. DRAM expansion slot 1 only supports singlebank DIMMs. DRAM expansion slots 2 and 3 support both single-bank and dual-bank DIMMs. No DRAM is soldered on the logic board.
Basics Dual In-Line Memory Modules (DIMMs) - 12 computers, use only the shortest of the three (1.100 inches). Taller DIMMs put excessive pressure on the DIMM sockets due to mechanical pressure inside the case. The DIMMs can be installed one or more at a time. In the 4400/160 each DIMM slot can support up to a 32 MB bank of memory. In the 4400/200 and 7220/200, the first DIMM slot supports up to a 32 MB bank and the other two support up to 64 MB in each.
Basics Video RAM - 13 Video RAM The logic board has a 120-pin video DIMM connector that allows the use of EDO RAM. The video controller supports the following for video memory: • 1 or 2 MB of EDO RAM • 1, 2, or 4 MB of SGRAM PC Compatibility Cards Apple computer offers PC Compatibility Card upgrade kits that bring full DOS functionality to the Power Macintosh 4400 computers. The cards plug into any available PCI slot on the logic board.
Basics GeoPort Technology - 14 GeoPort Technology Geoport is a hardware and software communications architecture that has been optimized for computertelephony integration. It has three main attributes: • It lets any GeoPort-compatible computer connect to any telephone (analog or digital, public or private) anywhere in the world. • Once connected, it supports an arbitrary number of independent data streams up to a total bandwidth of 2 MB/second.
Basics Front View - 15 Front View Monitor Hard Drive Computer Power Button CD-ROM Drive Open/Close Button Floppy Drive CD-ROM Drive Speaker Keyboard Power Key Mouse
Basics Rear View - 16 Rear View SCSI Port Voltage Selector Power Socket Expansion Slots (3) Access Covers Apple Desktop Bus (ADB) Port Printer Port External Modem Port Monitor Port Sound Output Port Sound Input Port
Basics Logic Board - 17 Logic Board Video DIMM Slot Processor with Heat Sink L2 Cache Slot ROM PCI Adapter Slot Power Supply Sockets Battery 3 DRAM Slots
K Service Source Specifications Power Macintosh 4400
Specifications Processor - 1 Processor CPU PM 4400/160 PM 4400/200, PM 7220/200 PM 4400/200 PC, PM 7220/200 PC PowerPC 603e processor 160 MHz Built-in floating point unit (FPU) PowerPC 603e processor 200 MHz Built-in floating point unit (FPU) PowerPC 603e processor 200 MHz Built-in floating point unit (FPU) 166 performance-rated 6x86 processor
Specifications Processor Bus Processor - 2 64-bit ROM data bus width 40 MHz system bus
Specifications Memory - 3 Memory DRAM 4400/160 4400/200, 7220/200 16 MB DRAM (no RAM soldered on board) Expandable to 96 MB in three slots using dual in-line memory modules (DIMMs) that are 64-bit wide, 168-pin unbuffered 3.3 V EDO, with 60 ns RAM access time or faster. 32 MB DRAM Expandable to 160 MB in three slots using dual in-line memory modules (DIMMs) that are 64-bit wide, 168-pin unbuffered 3.3 V EDO, with 60 ns RAM access time or faster, 1K or 2K refresh rate.
Specifications Video RAM Memory - 4 1 MB video EDO RAM DIMM Expandable to 4 MB with SGRAM DIMM EDO DIMM 1 or 2 MB SGRAM DIMM 1, 2, or 4 MB ROM 4 MB of read-only memory PRAM 8K of nonvolatile parameter memory Cache Memory 4400/160 Optional 256K Level 2 cache on a 160-pin DIMM card 4400/200, 7220/200 Optional 256K Level 2 cache DIMM
Specifications Disk Storage - 5 Disk Storage Floppy Drive CD-ROM Drive 1.4 MB Apple SuperDrive Accepts high-density 1.4 MB disks and 800K disks Reads, writes, and formats Macintosh, Windows, MS-DOS, OS/2, and ProDOS disks Advanced Technology Adapter Peripheral Interface (ATAPI) CD-ROM (8X-speed) Hard Drive 4400/160 1.
Specifications I/O Interfaces - 6 I/O Interfaces Apple Desktop Bus One Apple Desktop Bus (ADB) port supporting up to three ADB input devices daisy-chained through a synchronous serial bus Keyboard Supports all Apple Desktop Bus (ADB) keyboards Mouse Supports all models of the ADB mouse DMA I/O 10 DMA channels Communications Expansion Slot (4400/200, 7220/200) An Ethernet card or internal modem card may be installed in the bottom communications slot of the adapter card.
Specifications I/O Interfaces - 7 PCI Expansion 4400/160 4400/200, 7220/200 Three industry-standard PCI expansion slots (45 watts combined power allowance for all three slots). Install only expansion cards that come with Macintosh drivers and are compliant with the PCI 2.0 standard. NuBus cards cannot be used in these expansion slots. One internal expansion slot supports a full-size 12.28-inch 15-watt peripheral component interconnect expansion card. All three internal expansion slots support 6.
Specifications Video-out I/O Interfaces - 8 Monitor port (15-pin SVGA compatible) supporting color and grayscale monitors of various sizes and resolutions. Depending on the amount of video RAM installed, the built-in video supports up to 800 x 600 pixel resolution at 16 bits per pixel and up to 1152 x 870 at 8 bits per pixel. Built-in 2D graphics acceleration.
Specifications I/O Interfaces - 9 Sound 16-bit stereo audio input and output—stereo in, stereo record, stereo out. Up to 44.1 KHz sampling rate. Sound Output One 3.5-mm sound output port for line-level devices such as powered loudspeakers. Sound Input One 3.5-mm sound input port for stereo sound input. The sound input port supports the Apple PlainTalk Microphone.
Specifications SCSI Serial GeoPort Telephony I/O Interfaces - 10 One external standard SCSI port that supports up to seven external SCSI devices Important: Some older SCSI devices or SCSI devices not manufactured by Apple may require updated drivers. Contact the device manufacturer for information on obtaining driver software. Two high-speed DMA RS-232/RS-422 serial ports. LocalTalk and GeoPort compatible. Requires GeoPort telecom adapter 28.8 Kbit/sec. modem support V.
Specifications Electrical - 11 Electrical Line Voltage 90–270 VAC Switchable 110/220 VAC, RMS single phase Frequency 47–63 Hz Single phase Power 200 W maximum, not including display Energy Star EPA Energy Star compliant
Specifications Physical - 12 Physical Dimensions Weight Height: 5.43" (139 mm) Width: 15.12" (385 mm) Depth: 17.37" (442 mm) 24 lb. (9.5 kg) Weight varies depending on type of hard disk and any optional equipment.
Specifications Environmental - 13 Environmental Temperature Operating: 50°–104° F (10°–40° C) Storage: -40° to 116.6° F (-40° to 47° C) Transient: -40° to 149° F (-40° to 65° C) Humidity Noncondensing, 20–95% Altitude 0–10,000 ft.
K Service Source Troubleshooting Power Macintosh 4400
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.
Troubleshooting Symptom Charts/System - 2 Symptom Charts System System intermittently crashes or hangs 1 2 3 4 5 6 7 8 Verify that system software is version 7.5.3 or later. Verify that software is known-good. Verify that software is PowerPC-compatible (contact developer). Clear parameter RAM. Hold down Command-Option-P-R during startup, but before “Welcome to Macintosh” appears. Disconnect all external devices attached (except monitor) and restart. Replace DIMMs. Replace logic board.
Troubleshooting Symptom Charts/System - 3 System System does not start up 1 2 3 Reset logic board. Refer to Additional Procedures. Replace power supply. Replace logic board. Retain customer’s DIMMs. System does not start up from keyboard, but starts up from power switch 1 2 Check keyboard connection. Verify keyboard as known-good. System does not start up from power switch, but starts up from keyboard 1 Make sure power switch cable is properly plugged into logic board.
Troubleshooting Symptom Charts/System - 4 System Front power switch LED does not light up 1 2 3 4 Check LED connection to logic board. Check polarity of LED connector on logic board. Triangle should be over pin 1. Check cable for cuts (especially under CD-ROM drive). Replace LED harness.
Troubleshooting Symptom Charts/Audio - 5 Audio Distorted or garbled sound 1 2 3 Check volume level. Check volume level in Monitor and Sound control panel. Check speaker for damage. No sound output from speaker 1 2 Check speaker connection to logic board. Attach headphones. If you hear sound through headphones, replace speaker assembly. Replace speaker assembly.
Troubleshooting Symptom Charts/Video - 6 Video No video, fan is running 1 2 3 4 5 After restarting, two connected monitors, used for video mirroring, appear black or gray Check monitor connection. Try known-good monitor. Remove all DRAM DIMMs and try replacing them one at a time to test. Replace any bad DIMMs. Replace logic board. Retain customer’s DIMMs. Replace power supply. Note: This issue only affects early European Power Macintosh 4400 systems.
Troubleshooting Symptom Charts/Floppy Drive - 7 Floppy Drive Audio and video are present, but internal floppy drive does not operate 1 2 3 4 5 Replace bad disk with known-good disk. Make sure cable is connected to logic board. Replace floppy drive. Replace cable connecting to the logic board. Replace logic board. Retain customer’s DIMMs. Disk ejects; display shows icon with blinking “X” 1 2 3 Replace bad system disk with known-good system disk. Replace floppy drive. Replace logic board.
Troubleshooting Symptom Charts/Floppy Drive - 8 Floppy Drive Disk does not eject Internal floppy drive runs continuously 1 2 3 Insert opened paper clip into hole beside floppy drive. Switch off system and hold mouse button down while switching system on (to complete eject cycle). Replace floppy drive. 1 2 3 Replace bad disk with known-good disk. Replace floppy drive. Replace logic board. Retain customer’s DIMMs.
Troubleshooting Symptom Charts/Hard Drive - 9 Hard Drive Internal or external hard drive does not spin up 1 2 3 4 Verify that all hard drive connections are secure. Reseat logic board. Replace internal IDE hard drive. Replace logic board. Retain customer’s DIMMs. Internal hard drive runs continuously 1 2 3 4 Verify that system software is version 7.5.3 or later. Replace hard drive cable. Replace internal hard drive. Replace logic board. Retain customer’s DIMMs.
Troubleshooting Symptom Charts/Hard Drive - 10 Hard Drive Hard drive not recognized 1 2 Make sure CD-ROM interface cable is connected. Note: This IDE bus termination issue only affects early European Power Macintosh 4400 systems. Make sure hard drive cables are securely connected.
Troubleshooting Symptom Charts/CD-ROM Drive - 11 CD-ROM Drive CD-ROM drive does not accept disc 1 Volume control does not operate correctly when playing audio CD, but does work when playing system sounds Check Monitor and Sound control panel setting. Computer cannot mount known-good CD-ROM discs 1 2 3 2 If compact disc is dirty or damaged, use known-good compact disc. Replace CD-ROM drive. Check that CD-ROM drive software is installed correctly. Check power and signal cable connections.
Troubleshooting Symptom Charts/Peripheral - 12 Peripheral Cursor does not move Cursor moves, but when you click the mouse, nothing happens 1 2 3 4 5 6 Restart system. Check mouse connection. If mouse was connected to keyboard, connect mouse to rear ADB port and disconnect keyboard. If mouse works, replace keyboard. If mouse does not work in ADB port, replace mouse. Reseat logic board. Replace logic board. Retain customer’s DIMMs. 1 2 3 Replace mouse. Reseat logic board. Replace logic board.
Troubleshooting Symptom Charts/Peripheral - 13 Peripheral Cannot double-click mouse to open application, disk, or server No response to any key on keyboard 1 2 4 5 Check mouse speed on Mouse control panel. Unplug battery from logic board, wait 20 seconds, plug in battery, and restart computer. If mouse was connected to keyboard, connect mouse to rear ADB port and disconnect keyboard. If mouse works, replace keyboard. If mouse does not work in ADB port, replace mouse. Replace logic board.
Troubleshooting Symptom Charts/Peripheral - 14 Peripheral Known-good StyleWriter does not print 1 2 Known-good LaserWriter does not print 1 2 3 4 5 3 Verify that Chooser is set correctly. Verify that printer driver and system software are not corrupt. Verify system software is version 7.5.3 or later. Replace printer interface cable. Replace logic board. Retain customer’s DIMMs. Verify that Chooser is set correctly. Verify that printer driver and system software are not corrupt.
Troubleshooting Symptom Charts/Miscellaneous - 15 Miscellaneous No audio, and no drive operation 1 2 3 4 Connect power cable. Switch power on. Replace power cable. Replace logic board. Retain customer’s DIMMs. “Sad Macintosh” icon 1 2 3 Start up from known-good disk. Replace DIMMs. Replace logic board. Retain customer’s DIMMs.
Troubleshooting Symptom Charts/Miscellaneous - 16 Miscellaneous Screen shows “Sad Macintosh” icon and black vertical lines; screeching sound 1 2 Replace DIMMs. Replace logic board. Retain customer’s DIMMs. Headphone jack does not operate correctly Verify that headphone jack is seated properly.
K Service Source Take Apart Power Macintosh 4400
Take Apart Top Housing - 1 Top Housing No preliminary steps are required before you begin this procedure. Caution: Review the ESD precautions in Bulletins/ Safety.
Take Apart Top Housing - 2 1 Remove the screws that secure the housing to the rear of the chassis.
Take Apart Top Housing - 3 2 3 Firmly grasp both sides of the top housing at the back of the unit. Wrap your fingers around to the back of the unit. Push on the rear chassis to slide the housing back about 10 mm. Lift the top housing and remove it from the computer. Replacement Note: Place the top housing on the computer, aligning the sides with the chassis rails.
Take Apart Top Housing - 4 panel. Slide the top housing forward until it fits into place. If the lid doesn’t fit properly, check the link bar to be sure it is installed correctly. Also, if the floppy/CD-ROM drive carrier was removed, make sure the carrier hooks correctly into the bottom of the chassis. Replace the rear screws.
Take Apart Link Bar - 5 Link Bar Before you begin, remove the top housing. Caution: Review the ESD precautions in Bulletins/ Safety.
Take Apart Link Bar - 6 1 Detach the pegs of the link bar from the slots in the rear of the computer.
Take Apart Link Bar - 7 2 Slide the link bar back about half an inch and lift the link bar out.
Take Apart Link Bar - 8 Replacement Note: To replace the link bar, position the bar so that it firmly holds the PCI adapter board and disk drive carriers. Slide the link bar toward the front panel until it fits into place. The three hooks at the bottom of the link bar must catch the floppy/CD-ROM drive carrier. If it doesn’t fit correctly after the floppy/ CD-ROM drive carrier was removed, make sure the carrier was installed correctly.
Take Apart Link Bar - 9 lock the pegs into the slots in the rear of the chassis.
Take Apart Front Bezel - 10 Front Bezel Before you begin, remove the following: • Top housing • Link bar Caution: Review the ESD precautions in Bulletins/ Safety.
Take Apart Front Bezel - 11 1 2 Press the three front bezel release tabs inside the chassis. Remove the bezel from the chassis.
Take Apart Front Bezel - 12 Replacement Note: Insert the three tabs at the front base of the chassis. Snap the release tabs into place.
Take Apart Cache Card - 13 Cache Card Before you begin, remove the top housing. Note: Do not touch the connectors. Handle only by the edges.
Take Apart PCI Adapter Card - 14 PCI Adapter Card Before you begin, remove the following: • Top housing • Link bar Caution: Review the ESD precautions in Bulletins/ Safety. Press the connector down while pulling up on the PCI adapter card to remove it from the logic board slot.
Take Apart Hard Drive Carrier - 15 Hard Drive Carrier Before you begin, remove the top housing. Caution: Review the ESD precautions in Bulletins/ Safety.
Take Apart Hard Drive Carrier - 16 1 Lift up the hard drive carrier to detach it from the hooks on the floppy/ CD-ROM drive carrier.
Take Apart Hard Drive Carrier - 17 2 Disconnect the power and data cables attached to the hard drive.
Take Apart Hard Drive Carrier - 18 Caution: Cables can catch on the exposed hooks and become damaged. Replacement Note: Place the hard drive carrier on the hooks that attach it to the floppy/CD-ROM drive carrier.
Take Apart Hard Drive - 19 Hard Drive Before you begin, remove the following: • Top housing • Hard drive carrier Caution: Review the ESD precautions in Bulletins/ Safety.
Take Apart Hard Drive - 20 1 2 Remove the four screws that secure the hard drive to the hard drive carrier. Remove the hard drive from the carrier. Replacement Note: Position the hard drive on the hard drive carrier. Replace the four screws to secure the hard drive to the carrier. Connect the hard drive cables to the hard drive. Place the hard drive carrier on the hooks that attach it to the floppy/CD-ROM drive carrier.
Take Apart Floppy/CD-ROM Drive Carrier - 21 Floppy/CD-ROM Drive Carrier Before you begin, remove the following: • Top housing • Link bar • Front bezel • Hard drive carrier • PCI adapter card Caution: Review the ESD precautions in Bulletins/ Safety.
Take Apart Floppy/CD-ROM Drive Carrier - 22 1 Note: Press the plastic release tab on the audio tab to remove it. Disconnect the audio, data, and power cables from the CD-ROM drive.
Take Apart Floppy/CD-ROM Drive Carrier - 23 2 3 Disconnect the data cable from the floppy drive. Pull the floppy/CD-ROM drive carrier about 1 cm away from the front panel and toward the CD-ROM drive to avoid catching the metal hook under the logic board.
Take Apart Floppy/CD-ROM Drive Carrier - 24 4 Lift the carrier out of the computer.
Take Apart Floppy/CD-ROM Drive Carrier - 25 Replacement Note: Be sure the power button and LED wires are firmly held under the clips and clear of the floppy/CD-ROM carrier path. These wires are easily cut when the drive carrier slides across them. Also pull the power supply wires out of the way. Guide the CD-ROM drive under the metal spring tabs at the top of the opening in front of the chassis.
Take Apart Floppy/CD-ROM Drive Carrier - 26 place. Look at the front of the chassis to be sure the bottom edge of the CD-ROM drive carrier isn’t caught under the metal lip of the chassis CD-ROM drive opening. Be sure the drive carrier metal tab at the bottom left of the floppy drive is all the way through the slot in the chassis front opening.
Take Apart CD-ROM Drive - 27 CD-ROM Drive Before you begin, remove the following: • Top housing • Link bar • PCI adapter card • Front bezel • Hard drive carrier • Floppy/CD-ROM drive carrier Caution: Review the ESD precautions in Bulletins/ Safety.
Take Apart CD-ROM Drive - 28 1 2 Note: A long-neck Phillips screw driver will make it easier to remove the CD-ROM screws under the floppy carrier. Remove the four screws that secure the CD-ROM drive to the floppy/CDROM drive carrier. Remove the CD-ROM drive from the carrier.
Take Apart CD-ROM Drive - 29 Replacement Note: Position the CD-ROM drive on the drive bay. Replace the screws on both sides of the CD-ROM drive to secure it to the carrier. Replace the drive carrier in the computer, aligning the carrier with the tabs at the base of the housing. Fasten the hard drive carrier on the hooks on the side of the floppy/CDROM drive carrier. Connect the CD-ROM drive cables.
Take Apart Floppy Drive - 30 Floppy Drive Before you begin, remove the following: • Top housing • Link bar • Front bezel • PCI adapter card • Hard drive carrier • Floppy/CD-ROM drive carrier Caution: Review the ESD precautions in Bulletins/ Safety.
Take Apart Floppy Drive - 31 1 2 Remove the four screws under the floppy drive bay that secure the Apple SuperDrive to the floppy/CD-ROM drive carrier. Remove the Apple SuperDrive from the carrier. Replacement Note: Position the floppy drive on the bay of the carrier. Replace the four screws that secure the floppy drive to the carrier.
Take Apart Floppy Drive - 32 base of the housing. Fasten the hard drive carrier on the hooks on the side of the floppy/CD-ROM drive carrier. Connect the floppy drive cables.
Take Apart Logic Board - 33 Logic Board Before you begin, remove the following: • Top housing • Link bar • Front bezel • PCI adapter card • Hard drive carrier • Floppy/CD-ROM drive carrier Caution: Review the ESD precautions in Bulletins/ Safety.
Take Apart Logic Board - 34 1 Note: Press the release tab of the soft-power connector to remove it. Grasp the plastic connector (not the wires) when removing the CD audio cable. Disconnect all cables from the logic board. Refer to the logic board diagram at the end of this section.
Take Apart Logic Board - 35 2 Press the release tab near the front panel to release the logic board.
Take Apart Logic Board - 36 3 Raise up the front of the logic board and pull the external ports out of the access holes in the rear of the chassis. Guide the logic board away from the power supply. Replacement Note: Gently pull the power switch and speaker cables into the opening over the speaker/ fan assembly to keep the wires from being covered by the logic board.
Take Apart Logic Board - 37 holes in the back of the chassis. Lower the front of the logic board so that the pegs in the housing base fit into the logic board holes. Press the front edge of the logic board down until the release tab clicks. Connect all cables to the proper sockets on the logic board. (See the diagram on the next page. Two 4-pin connectors from the power supply have no sockets, and will remain unconnected.
Take Apart Logic Board - 38 board.
Take Apart Speaker Logic Board - 39 Cable Connection Slots Front Bezel Power Switch LED Fan PCI Adapter Slot IDE Hard Drive IDE ATAPI CD-ROM Drive SCSI Power Supply CD-ROM Audio Floppy Drive Power Supply Soft Power
Take Apart Power Supply - 40 Power Supply Before you begin, remove the following: • Top housing • Link bar • Hard drive carrier Caution: Review the ESD precautions in Bulletins/ Safety.
Take Apart Power Supply - 41 1 Note: Press the release tab of the soft-power connector to remove it.
Take Apart Power Supply - 42 Disconnect the five power supply cables from the logic board sockets.
Take Apart Power Supply - 43 2 Disconnect the power supply connectors from the hard drive and CDROM drive.
Take Apart Power Supply - 44 3 Remove the 4 screws that secure the power supply to the rear of the chassis.
Take Apart Power Supply - 45 4 Push the power supply about one cm from the rear of the chassis and lift it out of the computer. Replacement Caution: The power supply cable connectors that attach to the logic board are keyed with matching notches. It is possible to force the connectors into the wrong sockets, and this could cause serious damage to the computer. Be sure the connectors are in the correct sockets.
Take Apart SCSI Cable - 46 SCSI Cable Before you begin, remove the following: • Top housing • Link bar • PCI adapter card Caution: Review the ESD precautions in Bulletins/ Safety.
Take Apart SCSI Cable - 47 1 Remove the two hex nuts that secure the SCSI cable to the rear of the chassis.
Take Apart SCSI Cable - 48 2 3 Disconnect the SCSI cable from the logic board. Remove the SCSI cable from inside the chassis.
K Service Source Upgrades Power Macintosh 4400
Upgrades DRAM DIMM - 1 DRAM DIMM DRAM Slot #1 DRAM Slot #2 DRAM Slot #3 Before you begin, remove the following: • Top housing • Link bar • PCI adapter card Caution: Review the ESD precautions in Bulletins/ Safety. Note: The DRAM sockets are located behind the PCI adapter card that supports the PCI cards in the computer.
Upgrades DRAM DIMM - 2 1 DRAM DIMM Notches Connectors 2 DRAM Socket (1 of 3) Ribs (Inside Socket) (Front of Computer Ejector ) DRAM slot #1 DRAM slot #2 DRAM slot #3 3 Push the ejector on the DRAM slot outward and down to open it. Note: Do not touch the DIMM connectors. Handle the DIMM only by the edges. With the ejector in the open position, align the DRAM DIMM notches with the small ribs inside the socket. Push down on the DIMM until it snaps into place. The ejector will automatically close.
Upgrades Video RAM DIMM - 3 Video RAM DIMM Before you begin, remove the top housing. Caution: Review the ESD precautions in Bulletins/ Safety.
Upgrades Video RAM DIMM - 4 1 Video RAM DIMM Notch Video RAM DIMM Socket Connectors Rib (Inside Socket) Front of Computer 2 Note: Do not touch the video RAM DIMM connectors. Handle only by the edges. Align the notches in the video RAM DIMM with the small ribs inside the module slot, and insert the module into the slot. Push down on the DIMM until it snaps into place.
Upgrades Cache Card - 5 Cache Card Before you begin, remove the top housing. Caution: Review the ESD precautions in Bulletins/ Safety.
Upgrades Cache Card - 6 Note: The cache card is designed to fit into the slot only one way. Notches Cache Card Connectors Cache Card Socket Ribs (Inside Socket) Front of Computer Note: Do not touch the connectors. Handle only by the edges. Align the notches in the cache card with the small ribs inside the card slot, and insert the card into the slot.
Upgrades PCI Slots (3) PCI Card - 7 PCI Card Before you begin, remove the top housing. Caution: Review the ESD precautions in Bulletins/ Safety. Note: A 6.88-inch card fits in all three slots of a Power Macintosh 4400/160. A 6.88-inch card fits in the top two slots of the Power Macintosh 4400/200 and 7220/200. A 12-inch card fits in the middle slot only.
Upgrades PCI Card - 8 1 Port Cover If the PCI card has ports for connecting equipment, remove the port access cover.
Upgrades PCI Card - 9 2 Video RAM DIMM To install a PCI card in the bottom slot of the Power Macintosh 4400/ 160, you must temporarily remove the video RAM DIMM. Press down on the video RAM DIMM slot while pulling up on the video RAM DIMM.
Upgrades PCI Card - 10 3 Connectors Remove the PCI card from the static-proof bag, holding it by the edges to avoid touching any connectors.
Upgrades PCI Card - 11 PCI Slot Card Fence 4 Insert the PCI card into the PCI slot, aligning any ports on the card with the port access opening. Press the card firmly into the slot.
Upgrades PCI Card - 12 5 6 Screw Reinstall the screw removed from the port access cover. If you removed the video RAM DIMM, reinstall it.
Upgrades Communications Card - 13 Communications Card Slot Communications Card Before you begin, remove the top housing. Caution: Review the ESD precautions in Bulletins/ Safety. Communications Card Port Note: A communications card can only be installed in the bottom slot of the adapter card in a Power Macintosh 4400/200 or 7220/200. An Ethernet or internal modem card may be installed here.
Upgrades Compatible Logic Board Fence Compatible Not compatible Communications Card - 14 Communications Card Logic Board (Side View) Notches Communications Slot Notches Notches wants both Ethernet and internal modem cards, install an Ethernet PCI card in one of the upper slots and install the modem card in the lower communications slot. Note: Some communications cards are not compatible. Look at the placement of the notches on the card, and use this illustration to help identify a compatible card.
Upgrades Communications Card - 15 1 2 Video RAM DIMM Note: You may need to temporarily remove the video RAM DIMM. To remove the video RAM DIMM, press down on the video RAM DIMM slot while pulling up on the video RAM DIMM. Remove the communications card from its static-proof bag, and hold the card by its edges to avoid touching the connectors.
Upgrades Communications Card - 16 Communications Card Hook Communications Card Slot Communications Card Access Cover Communications Card 3 If the card has a hook, be sure it engages the hole in the access cover.
Upgrades Communications Card - 17 4 Communications Card Slot 5 6 Communications Card If the card doesn’t have a hook, pass the external connector through the opening in the access cover. Insert the card into the communications slot. If it meets resistance, pull the card out and reinsert the connector. Press solidly into place. Check the connection by lifting the card gently. If it resists and stays in place, it is solidly connected.
Upgrades Communications Card - 18 7 If you removed the video RAM DIMM, replace it following the steps in the “Video RAM DIMM” section of this chapter. Note: Communications software may need to be installed for the card to work. Also, for an Ethernet card, the network connection in the AppleTalk control panel may need to be changed. See the manual that came with the card.
Upgrades PC Compatibility Cards - 19 PC Compatibility Cards For information about these cards and installation instructions, refer to the PC Compatiblity Card manual on this Service Source CD.
K Service Source Additional Procedures Power Macintosh 4400
Additional Procedures Battery Verification - 1 Battery Verification Before you begin, remove the following: • Top housing • Link bar • Hard drive carrier • Floppy/CD-ROM drive carrier Caution: Review the ESD precautions in Bulletins/ Safety.
Additional Procedures Battery Verification - 2 1 2 3 4 Disconnect the battery connector. Set the voltmeter to the 10 volts DC scale. Hold the positive probe of the voltmeter to the positive end of the battery connector and the negative probe to the negative end of the battery connector. If the battery voltage is below 3.0 volts, replace the battery. Refer to “Battery Replacement” in this chapter.
Additional Procedures Battery Replacement - 3 Battery Replacement Before you begin, remove the following: • Top housing • Link bar • Hard drive carrier • Floppy/CD-ROM drive carrier Note: Battery location is different in 4400 computers sold in Germany. See “Battery Replacement for 4400s Sold in Germany” in this chapter.
Additional Procedures Battery Replacement - 4 Caution: Review the ESD precautions in Bulletins/ Safety. 1 2 3 Pull up and disconnect the connector. Pull up and remove the battery from its hookand-loop base. Install the new battery.
Additional Procedures Logic Board Reset - 5 Logic Board Reset Before you begin, remove the following: • Top housing • Link bar • Hard drive carrier • Floppy/CD-ROM drive carrier Caution: Review the ESD precautions in Bulletins/ Safety.
Additional Procedures Logic Board Reset - 6 1 2 3 Pull up and disconnect the battery connector. Pull up and remove the battery from its hookand-loop base. Wait 5-10 minutes and then replace the battery. Note: This procedure resets PRAM. Be sure to check the computer’s time/date and other system parameter settings following the procedure.
Additional Procedures Logic Board Reset - 7 Note: If this procedure resolves the problem, claim an adjustment on an SRO. If not, replace any defective parts and do not claim the adjustment.
Additional Procedures Battery Replacement for 4400s Sold in Germany - 8 Battery Replacement for 4400s Sold in Germany Before you begin, remove the following: • Top housing • Link bar • Cache card 1 Using needle-nose pliers, pull up and disconnect the battery connector.
Additional Procedures Battery Replacement for 4400s Sold in Germany - 9 2 3 Pull up and twist to remove the battery from its hook-and-loop base. Install the new battery and attach the battery connector.
Additional Procedures Battery Replacement for 4400s Sold in Germany - 10 4 Press the reset switch on the logic board using a flat plastic tool.
K Service Source Exploded View Power Macintosh 4400
Exploded View 1 Top Housing Power Supply 661-1248 Link Bar 1.
