Service Manuals, User Guides, Schematic Diagrams or docs for : apple macintosh_plus

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K Service Source




Macintosh Plus
K Service Source




        Basics
 Macintosh Plus
Basics                                          Overview - 1


                                  Overview
                                  This manual contains
                                  complete repair procedures
                                  for the Macintosh Plus,
                                  shown at left.




         Figure: Macintosh Plus
K Service Source




Specifications
 Macintosh Plus
    Specifications                                                         Introduction - 1

Introduction
Specifications information for this product can be found in this chapter and also in the
  Spec Database, which you can access in one of three ways:

-- Launch it directly by double-clicking the Apple Spec Database runtime alias at the top
   level of the Main Service Source CD.
-- Select "Apple Spec Database" from the Service Source drop-down main menu.
-- Click the Acrobat toolbar icon for the database, which is near the right end of the
   toolbar with the letters "SP."
      Specifications                                   Processor - 2

                       Processor

CPU                    Motorola 68000 microprocessor
                       7.83 MHz
                       32-bit internal data bus
      Specifications                                                       Memory - 3

                       Memory

RAM                    1 MB, expandable to 4 MB (150 ns or faster SIMMs)


ROM                    128K


PRAM                   CMOS custom chip with 4.5 V, user-replaceable battery backup
                         (includes 256 bytes of memory; remembers system
                         parameters even with the machine switched off)
     Specifications                                                   Disk Storage - 4

                      Disk Storage

Floppy Drive          Internal, double-sided drive: uses 3.5-in., hard-case floppy
                         disks--either double-sided, 800K capacity or single-sided,
                         400K capacity
         Specifications                                               I/O Interfaces - 5

                          I/O Interfaces

Floppy Drive              External drive port; DB-19 connector


SCSI                      One SCSI parallel port; DB-25 connector


Mouse                     Mouse port; DE-9 connector


Keyboard                  Synchronous serial keyboard bus; RJ-11 connector


Serial                    Two RS-422 serial ports; mini DIN-8 connectors
    Specifications                                                     I/O Devices - 6

                     I/O Devices

Keyboard             78 keys, including numeric keypad and cursor keys; RJ-11
                       connector


Mouse                Mechanical tracking; optical shaft encoding at 3.54 pulses per mm
                       (90 pulses per in.) of travel; DE-9 connector
     Specifications                                                Sound and Video - 7

                      Sound and Video

Sound Generator       Four-voice sound with 8-bit digital/analog conversion, using
                        22-kHz sampling rate


Video Display         9-in. (diagonal) screen; 512 by 342 pixel, bit-mapped display
     Specifications                 Electrical - 8

                      Electrical

Line Voltage          105

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