Bottom Cover

Remove the CD-ROM drive (if installed) Remove the internal chassis Review the ESD precautions in Bulletins Safety 1 Shift the actuator toward the back of the unit. 2 Squeeze together the tabs on the shaft of the actuator. There is only one correct position for the insulator sheet. Match the notches on the sides of the insulator sheet with the corresponding metal stops. 5 Using a screwdriver, release the tabs on the upper-rear edge of the bottom cover.

IO Interfaces

Internal expansion slot supports either NuBus, processor-direct slot (PDS) card, or digital audio video expansion (DAVE) card (with appropriate adapter) Supports a maximum of six external devices (internal SCSI devices include the computer, which is always device 7) Two Apple Desktop Bus (ADB) ports for keyboard, mouse, and low-speed input devices mini DIN-4 connectors Internal expansion slot supports either a processor-direct slot card or 7-inch NuBus card (with appropriate adapter) Serial Two...

Power Supply

Review the ESD precautions in Bulletins Safety. 1 Remove the screw that secures the power supply. For easier access to the power supply, release the floppy drive mounting tabs. Slide the floppy drive forward a few inches. 3 If a CD-ROM drive is present, disconnect the SCSI data cable and CD-ROM drive power cable from the CD-ROM drive. 4 Disconnect the CD-ROM audio cable. 6 Press up on the tab and slide out the CD-ROM drive. Main power cable from the logic board Hard drive power cable from the...

Battery Replacement

Warning If handled or discarded improperly, the lithium battery in the computer could explode. Review battery-handling and disposal instructions in Bulletins Safety. Review the ESD precautions in Bulletins Safety. Using a small flat-blade screwdriver, pry open the latch at the end of the battery holder and lift off the cover. 2 Grasp the battery and remove it from the holder. 3 Return the battery to Apple for proper disposal. For battery packaging and labeling instructions, refer to the safety...

Hard Drive

Review the ESD precautions in Bulletins Safety. Disconnect the SCSI data and hard drive power cables from the hard drive. 3 Press down on the tab and slide out the hard drive. Review the ESD precautions in Bulletins Safety. 1 Disconnect the SCSI data cable and CD-ROM drive power cable from the CD-ROM drive. 2 Disconnect the CD-ROM audio cable. 4 Press up on the tab and slide out the CD-ROM drive. Replacement Note Be sure to remove the CD-ROM drive from the carrier prior to returning the drive...

Power Mac Upgrade

No preliminary steps are required before you begin this procedure. The Centris 660AV and Quadra 660AV can be upgraded to a Power Macintosh 6100 60 or Power Macintosh 6100 60AV. For upgrade instructions, refer to Additional Procedures in the Power Macintosh 6100 manual. Additional Procedures Centris 660 AV Quadra 660AV

Expansion Cards

Review the ESD precautions in Bulletins Safety. 1 Remove the expansion port cover from the back panel. 2 Loosely connect the expansion card connector to the adapter card connector. Note Be sure to fit the adapter card pin into the expansion card hole. 3 Gently press the connectors together. ' ' ' V- -i i U i s ' ' ' V- -i i U i s Insert the connector on the bottom of the adapter card into the expansion slot. Note Make sure that the tab on the side of the adapter card slides into the slot on...

Logic Board

Rom Out Video

Review the ESD precautions in Bulletins Safety. 1 Using a long Phillips screwdriver, remove the screw from the center of the standoff. 3 Remove the Phillips screw from the front edge of the logic board. 4 Disconnect these cables from the front edge of the logic board CD-ROM audio cable if present 5 Note Lift the front edge of the logic board to make removing the floppy drive cable easier. Disconnect these cables from the back edge of the logic board 7 Remove the EMI shield from the hard drive...

Internal Chassis and Speaker

Before you begin remove the following Remove the CD-ROM drive if installed Review the ESD precautions in Bulletins Safety. Note The chassis is secured to the bottom cover by two tabs at the front of the unit, two rail and tab sets at the sides of the unit, support posts at the back of the chassis, and hidden brackets that slide into the bottom cover. 1 Press up on one of the front tabs while lifting the support post. 2 Repeat this step on the other side until the internal chassis slides easily...

Symptom Charts

1 Disconnect 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. 2 Disconnect floppy drive cable connector and reboot system. If startup sequence is normal, replace floppy drive. 3 Replace logic board. Retain customer's SIMMs. One-part error chord sounds during startup sequence Two-part error chord sounds during startup sequence 2 Replace logic board. Retain customer's SIMMs. 3 Perform DRAM...