Service Manuals, User Guides, Schematic Diagrams or docs for : apple quadra.centris_650

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        K Service Source




Centris 650/Quadra 650
     K Service Source




              Basics
Centris 650/Quadra 650
Basics                                                      Overview - 1


                                              Overview
                                              This manual includes
                                              complete repair procedures
                                              for the Macintosh Centris
                                              650/Quadra 650 shown at
                                              left.




   Figure: Macintosh Centris 650/Quadra 650
     K Service Source




      Specifications
Centris 650/Quadra 650
     Specifications                                           Processors - 1

                      Processors

Centris 650           Motorola 68040
                      25 MHz
                      Built-in memory management unit (MMU)


Quadra 650            Motorola 68040
                      33 MHz
                      Built-in memory management unit (MMU)


Coprocessor           Optional floating-point unit (FPU)


Addressing            32-bit internal registers
                      32-bit address bus
                      32-bit data bus
      Specifications                                                     Memory - 2

                       Memory

RAM                    4 or 8 MB RAM, expandable to 132 MB (72-pin SIMM)


ROM                    1 MB


PRAM                   256 bytes nonvolatile parameter memory


VRAM                   512K, expandable to 1 MB


Clock/calendar         CMOS custom chip with long-life lithium battery
     Specifications                                             Disk Storage - 3

                      Disk Storage

Floppy Drive          1.4 MB Apple SuperDrive


Hard Drive            Internal Apple SCSI hard drive
                      80 MB to 500 MB


CD-ROM                Optional internal 5.25-in. CD-ROM drive
         Specifications                                                 I/O Interfaces - 4


                          I/O Interfaces

SCSI                      One SCSI port; DB-25 connector
                          Supports a maximum of six external devices (internal SCSI
                          devices include the computer, which is always device 7)


Apple Desktop Bus         Two Apple Desktop Bus (ADB) ports; mini-Din-4 connectors
                          Low-speed synchronous serial interface


Serial                    Two RS-232/RS-422 serial ports; mini DIN-8 connectors
                          230.4 Kbps maximum
                          0.92 Mbps maximum, clocked externally


NuBus                     Three NuBus slots
        Specifications                                                  I/O Interfaces - 5

Expansion Slot           One inline processor-direct slot


Sound                    One stereo-capable output port
                         One monaural input port


Video                    One video port, DB-15 connector
                         Supports Apple monitors (8-bit)
                         VGA and SVGA monitors require a special adapter cable


Ethernet                 On-board Apple Ethernet port
     Specifications                                                     I/O Devices - 6

                      I/O Devices

Keyboard              Standard, extended, or adjustable keyboard connected through two
                         ADB ports
                      Maximum power draw for all ADB devices: 500 mA
                      Keyboard draws 25

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