Commodore 64 Service Manual.pdf

SERVICE MANUAL

MODEL C64 COMPUTER

SEPTEMBER 1985 PN-314001-02

Commodore Business Machines, Inc.

1200 Wilson Drive, West Chester, Pennsylvania 19380

U.S.A

Commodore makes no expressed or

implied warranties with regard to

the information contained herein.

The information is made available

solely on as is basis, and the entire

risk as to quality and accuracy is

within the user. Commodore shall

not be liable for any consequential

or incidental damages in connection

with the use of the information

contained herein. The listing of any

available replacement part herein

does not constitute in any case a

recommendation, warranty or

guaranty as to quality or suitability

of such replacement part.

Reproduction or use without

expressed permission, of editorial or

pictorial content, in any matter is

prohibited.

This manual contains copyrighted and proprietary information. No

part of this publication may be reproduced, stored in a retrieval

system, or transmitted in any form by any means, electronic,

mechanical, photocopying, recording or otherwise, without the

prior written permission of Commodore Electronics Limited.

Converted to PDF: peter.sieg1@gmx.de in Jan.2007

CONTENTS

SPECIFICATIONS

PRODUCT PARTS LIST

BLOCK DIAGRAM

CIRCUIT THEORY

POWER SUPPLY

RESET LOGIC

CLOCK CIRCUITS

I/O, RAM, EXPANSION LOGIC

RAM CONTROL LOGIC

5 PIN VIDEO AND AUDIO OUTPUTS

8 PIN VIDEO AND AUDIO OUTPUTS

CASSETTE INTERFACE

KEYBOARD, JOYSTICK & PADDLE INTERFACES

SERIAL INTERFACE, USER PORT

TROUBLESHOOTING GUIDE

BOARD IDENTIFICATION

PCB ASSEMBLY #326298-01

BOARD LAYOUT

PARTS LISTS

SCHEMATIC #326106

PCB ASSEMBLY #260407-04

BOARD LAYOUT

PARTS LIST

MODULATOR SCHEMATIC #251025

SCHEMATIC #251138

PCB ASSEMBLY #250425-01

BOARD LAYOUT

PARTS LIST

MODULATOR SCHEMATIC #251696

SCHEMATIC #251469

PIN ASSIGNMENTS

C64 COMPUTER

GENERAL DESCRIPTION The "All Purpose" Commodore 64 us the complete computer for education,

home or small business applications. Supported by quality peripherals and a full

range of software, the Commodore 64 is perfect for the family. No other

computer can offer such variety of uses and applications at such an affordable

price.

MEMORY

64K RAM

ROM

20K ROM Standard (includes operating system and BASIC interpreter)

MICROPROCESSOR 6510A Microprocessor - 1.02 MHz clock

Compatible with the 6502

DISPLAY

40 Columns X 25 lines of text

COLORS

16 Background, border and character colors

CHARACTERS

Upper & lower case letters, numerals and symbols

Reverse characters

All PET graphic characters

DISPLAY MODES

Text characters

High resolution graphics

RESOLUTION

320 X 200 Pixels

SPRITES

8 independent sprites

Each consists of 24 X 21 pixels and up to 4 colors

Each independently expandable horizontally and vertically

Collision detection for sprite to sprite and data to sprite collisions

SOUND

6581 Sound Interface Device includes 3 independent tone generators - each

with 9 octaves

Each voice includes programmable ADSR generator (Attack, Decay, Sustain,

Release) and control of sawtooth, triangle, square, variable pulse and noise

waveforms

Full filtering capabilities with low, high and band pass filters

External sound input

KEYBOARD

Full size typewriter style design

KEYS

66 Keys total

2 Cursor control keys

4 Function keys (up to 8 user defined/programmable functions possible)

Upper and lower case character set

Graphic character set

INPUTS/OUTPUTS

User port

Serial port

ROM cartridge port

2 Joystick/paddle ports

Video port

C1530 Cassette drive interface port

FEATURES

Built-in BASIC 2.0 - over 70 commands, statements and functions

Full screen editor

PERIPHERALS

C1541 Disk drive

C1530 Datasette

MPS 801 Dot matrix printer

MPS 802 Dot matrix printer

MPS 803 Dot matrix printer

DPS 1101 Daisey wheel printer

C1520 Plotter/Printer

C1702 Color monitor

CM141 Color monitor

POWER REQUIREMENTS 120 Volts, 60 Hz

Specifications subject to change without notice.

PARTS LIST

C-64

PLEASE NOTE: Commodore part numbers are printed for reference only and do not indicate the availability of

parts from Commodore. Industry standard parts (Resistors, Capacitors, Connectors) should be secured locally.

Approved cross-references for TTL-chips, Transistors, etc. will be available in manual form through the Service

Department in November of 1984. Unique or non-standard part will be stocked by Commodore and are indicated

on the parts list by a "C".

TOP CASE ASSY

Top Case

C 326113-01

Keyboard

C 326166-02

LED Plate

C 326160-01

Nameplate

C 326161-01

Lamp Hold Set

C 903820-03

LED Assembly

C 1001039-01

BOTTOM CASE ASSY

Bottom Case

C 326114-01

Foot, Self-Adhesive

C 950157-04

PCB Shield Plate

C 326131-01

PCB Insulation Sheet

C 326288-01

ACCESSORIES

Users Manual

C 320974

Power Supply

C 251053-02

RF Cable

C 326189-01

Switch Box

C 904778-01

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika: