Motorola 660AV manual Processors

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Specifications	Processors - 1

Processor

Addressing

Direct Memory Access (DMA)

Processors

Motorola 68040 25 MHz

Built-in paged memory management unit (PMMU), floating point unit (FPU), and 8K memory cache

32-bit registers

32-bit address/data bus

A Peripheral Subsystem Controller (PSC) provides direct memory access (DMA) between the 68040 buses and peripheral devices

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Contents Centris 660AV/Quadra 660AV Basics Figure Centris 660AV and Quadra 660AV OverviewSpeciﬁcations Processors Digital Signal Memory Vram CD-ROM Disk StorageExpansion Slot InterfacesEthernet Audio Keyboard DevicesSound Generator Sound and VideoElectrical Line Voltage Frequency PowerPhysical Environmental Troubleshooting General Error Chords Symptom ChartsSystem System Floppy Drive Floppy Drive Floppy Drive Video Video Hard Drive Troubleshooting Symptom Charts/Hard Drive CD-ROM drive Peripheral Troubleshooting Symptom Charts/Peripheral Peripheral Miscellaneous Take Apart Top Cover Power Supply Power Supply Take Apart Power Supply Take Apart Take Apart Power Supply Remove the CD-ROM Drive EMI shield Tab Main Power Supply Power Switch Logic Board Take Apart Logic Board Floppy Speaker Drive Cable Disconnect these cables CD-ROM Drive EMI Shield Hard Drive EMI Shield Tab Take Apart Logic Board Slide the logic board Replacement Note Slide Floppy Drive Take Apart Take Apart Floppy Drive Hard Drive Take Apart Hard Drive Take Apart Hard Drive Remove the hard drive EMI shield Tab CD-ROM Drive Power Cable Scsi Data Cable Take Apart CD-ROM Drive Remove the CD-ROM Drive EMI shield Replacement Note Be sure Internal Chassis and Speaker Two rail and tab sets at Page Cable and the LED cable Remove the two torx Bottom Cover Internal Chassis Metal Tab Rail Replacement Note After Bottom Cover Actuator Replacement Note Take Apart Bottom Cover Upgrades Expansion Cards Upgrades Expansion Cards Loosely connect Adapter Card Tab Connector Bottom Case Slot Expansion Slot Upgrades Expansion Cards Attach the thumbscrews Upgrade Slotted CD-ROM Drive Bezel Drive Bay Shield Upgrades CD-ROM Drive Upgrade Push in the CD-ROM Align the slots at Connect these cables Power Mac Upgrade Additional Procedures Verification BatteryPositive Probe Negative Probe Replacement Page Page Exploded View Exploded View