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K Service Source
Macintosh Classic/
Classic II/Performa 200
K Service Source
Basics
Macintosh Classic/Classic II/
Performa 200
Basics Overview - 1
Overview
This manual includes
complete repair procedures
for the Macintosh Classic,
Classic II, and Performa
200.
Figure: Macintosh Classic/Classic II and Performa 200
K Service Source
Specifications
Macintosh Classic/Classic II/
Performa 200
Specifications Processor - 1
Processor
Classic CPU Motorola 68000 microprocessor
7.8336 MHz
32-bit internal data bus
256-byte instruction and data caches
Classic II/Per 200 Motorola 68030 microprocessor
CPU 16 MHz
32-bit internal data bus
256-byte instruction and data caches
Specifications Memory - 2
Memory
RAM
Classic: 1 MB, expandable to 4 MB (120 ns or faster SIMMs)
Classic II/Per 200: 2 MB, expandable to 10 MB (120 ns or faster SIMMs)
ROM 512K
PRAM 256 bytes of parameter memory
Cache Connector 44-pin connector for optional memory expansion
256K by 4-bit DRAMs
Includes two SIMM connectors for additional RAM expansion
Specifications Disk Storage - 3
Disk Storage
Floppy Drive Internal 1.4 MB floppy drive
Optional external 800K or 1.4 MB floppy drive
Hard Drive
Classic: Optional internal 40 MB hard drive; optional external SCSI drive
Classic II/Per 200: Internal 40 MB or 80 MB hard drive; optional external SCSI
drive
Specifications I/O Interfaces - 4
I/O Interfaces
Floppy Drive External drive port; DB-19 connector
SCSI One SCSI parallel port; DB-25 connector
Apple Desktop Bus One Apple Desktop Bus (ADB) port; mini DIN-4 connector
Serial Two RS-422 serial ports; mini DIN-8 connectors
Sound Dual-channel headphone connector
Connected to the monophonic sound output
Macintosh Classic does not provide true two-channel output
(although stereo jack may be used)
Specifications I/O Devices - 5
I/O Devices
Keyboard 80 keys, with numeric keypad; ADB connector
Mouse Mechanical tracking; ADB connector
Classic II/Per 200 Electret, omnidirectional; output voltage is 4 mV, peak to peak, at
Microphone normal volume
Specifications Sound and Video - 6
Sound and Video
Sound Generator
Classic: Four-voice sound with 8-bit digital/analog conversion, using
22-kHz sampling rate
Video Display
Classic II/Per 200: Monophonic, 8-bit digital/analog conversion using 22-kHz
sampling rate; capable of driving stereo headphones or other
stereo equipment through the sound jack
9-in. (diagonal) screen; high-resolution, 512 by 342 pixel,
bit-mapped, monochrome display
Specifications Electrical - 7
Electrical
Line Voltage 100