/pub/cbm/schematics/computers/c128/servicemanuals/manual/

Service Manual C-128/C128D Computer, November 1987, PN-314001-08

Files

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Title page

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Table of contents
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Specifications
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Parts list
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Block diagram (wide sheet)
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Bus architecture
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8502 microprocessor
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Z-80 microprocessor
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Memory architecture
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Read Only Memory
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Random Access Memory
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Memory Management Unit
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Programmed Logic Array
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8701 clock generator
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Video interface
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8564 Video Interface Chip
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8563 Video Controller
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8568 CRT Controller
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8580 Sound Interface Device
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Floppy disk drive read/write head amplifier
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48r.gif 2017-04-17 100749
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Input/Output circuits: Cassette interface
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Keyboard
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Expansion bus
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Serial bus
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Troubleshooting: Common line definitions
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Common ICs (pin assignments and logic)
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Board layout, PCB assy #310379 revision 6. Identifying factor:
On solder side of board at the expansion bus, CN1, the artwork
#310381 rev. 6 appears.
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PCB assembly #310379 rev. 6
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66l.gif 2017-04-17 26472
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I/O - Control Ports, Keyboard, User Port, Serial Port, Cassette Port

Schematic 310378 rev. 6, sheet 1 of 4
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67r.gif 2017-04-17 326464
Microprocessors, MMU, SID, PLA, power supply

Schematic 310378 rev. 6, sheet 2 of 4
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68r.gif 2017-04-17 283519
Video, Clock, Reset

Schematic 310378 rev. 6, sheet 3 of 4
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RAM, ROM

Schematic 310378 rev. 6, sheet 4 of 4

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Board layout, PCB ASSY #310379 revision 7. Identifying factor:
On solder side of board at the expansion bus, CN1, the artwork
#310381 rev. 7 appears.
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PCB assembly #310379 rev. 7
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Quick reference (table of topics and page numbers)
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I/O - control ports, keyboard, user port, serial port, cassette port

Schematic 310378 rev. 7, sheet 1 of 4
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Quick reference (table of topics and page numbers)
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Microprocessors, MMU, SID, PLA, power supply

Schematic 310378 rev. 7A, sheet 2 of 4
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Quick reference (table of topics and page numbers)
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Video, clock, reset

Schematic 310378 rev. 7A, sheet 3 of 4
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Quick reference (table of topics and page numbers)
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RAM, ROM

Schematic 310378 rev. 7, sheet 4 of 4
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RF modulator
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Power supply schematic - for reference only: Mitsumi - PN-252449-01
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Power supply schematic - for reference only: Dee-Van - PN-252449-03
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C128D major parts
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Service parts reference diagram: "explosion diagram" of the C128DCR
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Componets (sic) parts list - PCB assembly 250477
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Board layout - PCB assembly 250477-01 (C128DCR)
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Schematic 252451, sheet 1 of 5
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Schematic 252451, sheet 2 of 5
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Schematic 252451, sheet 3 of 5
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Schematic 252451, sheet 4 of 5
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index.html 2018-09-25 15157
Schematic 252451, sheet 5 of 5 (floppy disk drive controller)

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