Yokogawa µR20000 - Manual (Page 2)

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SM 04P01B01-01E
Important Notice to the User
• This manual contains information for servicing YOKOGAWA’s µR10000. Check the
serial number to confirm that this is the correct service manual for the instrument to be
serviced. Do not use the wrong manual.
• Before any maintenance and servicing, read all safety precautions carefully.
• Only properly trained personnel may carry out the maintenance and servicing
described in this service manual.
• Do not disassemble the instrument or its parts, unless otherwise clearly permitted by
this service manual.
• Do not replace any part or assembly, unless otherwise clearly permitted by this
service manual.
• In principle, Yokogawa Electric Corporation (YOKOGAWA) does not supply parts
other than those listed in the customer maintenance parts list in this service manual
(mainly modules and assemblies). Therefore if an assembly fails, the user should
replace the whole assembly and not components within the assembly (see “Note”). If
the user attempts to repair the instrument by replacing individual components within
the assembly, YOKOGAWA assumes no responsibility for any consequences such as
defects in instrument accuracy, functionality, reliability, or user safety hazards.
• YOKOGAWA does not offer more detailed maintenance and service information than
that contained in this service manual.
• All reasonable efforts have been made to assure the accuracy of the content of this
service manual. However, there may still be errors such as clerical errors or
omissions. YOKOGAWA assumes no responsibility of any kind concerning the
accuracy or contents of this service manual, nor for the consequences of any errors.
• All rights reserved. No part of this service manual may be reproduced in any form or
by any means without the express written prior permission of YOKOGAWA. The
contents of this manual are subject to change without notice.
Note
YOKOGAWA instruments have been designed in a way that the replacement of electronic
parts can be done on an assembly (module) basis by the user. YOKOGAWA instruments
have also been designed in a way that troubleshooting and replacement of any faulty
assembly can be done easily and quickly. Therefore, YOKOGAWA strongly recommends
replacing the entire assembly over replacing parts or components within the assembly. The
reasons are as follows:
• The instruments use high-performance microprocessors, large scale CMOS gate arrays,
and surface-mount components to provide state-of-the-art performance and functions.
• Repair of components can only be performed by specially trained and qualified
maintenance personnel with special highly accurate tools, including costly ones.
• When taking the service life and cost of the instruments into consideration, the
replacement of assemblies offers the user the possibility to use YOKOGAWA instruments
more effectively and economically with a minimum in downtime.
Trademarks
• Adobe, Acrobat, and PostScript are trademarks of Adobe Systems Incorporated.
• For purposes of this manual, the TM and  symbols do not accompany their
respective trademark names or registered trademark names.
• Company and product names that appear in this manual are trademarks or registered
trademarks of their respective holders.
1st Edition: March 2005 (YK)
All Rights Reserved, Copyright © 2005 Yokogawa Electric Corporation