Commodore 1541 - Preface

PREFACE
This manual contains information for the maintenance and repair of
the VIC-1541 and 1541 Disk Drives. This manual can help you save
on repair bills, reduce down time and improve the reliability of
your VIC-1541/1541. A brief description of the information
contained in this manual is given as follows:
Introduction-A narrative description of the use of this manual, as
well as a brief description of the assemblies contained in the
VIC-1541/1541.
Theory of Operation-A narrative description of electrical and
mechanical theory of operation, including block diagrams and
schematic excerpts.
Initial Configuration-Step by step procedures for verifying that
the VIC-1541/1541 is operating properly.
Calibration-Step by step procedures for calibrating disk rpm's,
head alignment and adjusting Track #1 stop.
Disassembly/Reassembly-Step by step procedures for the
disassembly/reassembly of the VIC-1541/1541.
Preventive Maintenance-Step by step procedures for preventive
maintenance, including cleaning and head care instructions.
Troubleshooting-Written in two parts: Part 1 gives step by step,
fully illustrated, procedures for isolating a problem down to the
PC Board or assembly level and is written with the novice in mind;
Part 2 is written for the experienced technician and contains
narrative instructions, backed up by 33 waveforms, to isolate a
problem down to an integrated circuit or to a discrete component.
Schematics and Parts Layout-Complete schematics, interconnect
diagram, sub-assembly identification and parts layout.
Appendices-Contain test equipment specifications, assembly
instructions for test accessories, CMOS handling precautions,
parts list and, in Appendix F, a narrative discussion of the
differences between the VIC-1541 and the 1541, along with
cross-reference tables.
All references in Sections 1 thru 9 of this manual refer to the
VIC-1541 disk drive. Appendix F must be consulted for information
concerning the 1541 disk drive.
Commodore Business Machines, Inc., and the author of this manual
advise that any attempt to repair the VIC-1541 or the 1541 disk
drives during the warranty period will void the factory warranty.