Motorola 660AV manual Symptom Charts, Error Chords

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Troubleshooting

Symptom Charts/Error Chords - 2

One-part error chord sounds during startup sequence

Two-part error chord sounds during startup sequence

Symptom Charts

Error Chords

1Disconnect SCSI data cable and hard drive power cable. Reboot system. If startup sequence is normal, run Macintosh Hard Disk Test and replace hard drive, if necessary.

2Disconnect floppy drive cable connector and reboot system. If startup sequence is normal, replace floppy drive.

3Replace logic board. Retain customer’s SIMMs.

1Replace DRAM SIMMs.

2Replace logic board. Retain customer’s SIMMs.

3Perform DRAM SIMM verification on replacement logic board.

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Contents Centris 660AV/Quadra 660AV Basics Overview Figure Centris 660AV and Quadra 660AVSpeciﬁcations Processors Digital Signal Memory Vram Disk Storage CD-ROMInterfaces Expansion SlotEthernet Audio Devices KeyboardSound and Video Sound GeneratorLine Voltage Frequency Power ElectricalPhysical Environmental Troubleshooting General Symptom Charts Error ChordsSystem 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 Battery VerificationPositive Probe Negative Probe Replacement Page Page Exploded View Exploded View