Tektronix YT-1 User manual

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Instruction Manual
YT-1 / YT-1S
Chart Recorder
070-9947-00
ST905-AD-MMC-010
0910-LP-024-4850
NOTE: This manual is intended for YT-1/YT-1S
Chart Recorders serial numbers B030500 and
higher, or units that have been upgraded to that
level (to identify upgrade, see page 8-5 and note
frame cutout next to print head). For instruments
with serial numbers B030499 and lower that have
not been upgraded, please contact your local
Tektronix Customer Service Representative for
information regarding module exchange service.
First Printing: Oct. 1998

Copyright E Tektronix, Inc. 1998. All rights reserved.
Tektronix products are covered by U.S. and foreign patents, issued and
pending. Information in this publication supercedes that in all
previously published material. Specifications and price change
privileges reserved.
Printed in the U.S.A.
Tektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000
TEKTRONIX, TEK, and YT-1 / YT-1S are registered trademarks of
Tektronix, Inc.

WARRANTY
Tektronix warrants that this product will be free from defects in materials and
workmanship for a period of one (1) year from the date of shipment. If any such
product proves defective during this warranty period, Tektronix, at its option,
eitherwillrepairthedefectiveproductwithout chargefor parts andlabor,orwill
provide a replacement in exchange for the defective product.
Inordertoobtainserviceunderthiswarranty,CustomermustnotifyTektronixof
the defect before the expiration of the warranty period and make suitable
arrangements for the performance of service. Customer shall be responsible for
packagingandshippingthedefectiveproducttotheservicecenterdesignatedby
Tektronix,withshippingchargesprepaid.Tektronixshallpayforthereturnofthe
product to Customer if the shipment is to a location within the country in which
theTektronixservicecenteris located. Customershallberesponsible for paying
allshippingcharges,duties,taxes,andanyotherchargesforproductsreturnedto
any other locations.
Thiswarrantyshallnotapplytoanydefect,failure,ordamagecausedbyimproper
use or improper or inadequate maintenance and care. Tektronix shall not be
obligatedtofurnishserviceunderthiswarrantya)torepairdamageresultingfrom
attempts by personnel other than Tektronix representatives to install, repair, or
service the product; b) to repair damage resulting from improper use or
connection to incompatible equipment; or c) to service a product that has been
modifiedorintegratedwithotherproductswhentheeffectofsuchmodificationor
integration increases the time or difficulty of servicing the product.
THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO
THIS PRODUCT IN LIEU OF ANY OTHER WARRANTIES,
EXPRESSED OR IMPLIED. TEKTRONIX AND ITS VENDORS
DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY
OR FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX’
RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE
PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED
TO THE CUSTOMER FOR BREACH OF THIS WARRANTY.
TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY
INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE
VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH
DAMAGES.

YT-1 / YT-1S Chart Recorder v
Table of Contents
General Safety Summary
Operator Safety Summary vii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Safety Summary viii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation and Repacking
Unpacking and Initial Inspection ix. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Source and Power Requirements ix. . . . . . . . . . . . . . . . . . . . . . .
Repacking for Shipment ix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Instructions
Instructions for Use 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Paper Replacement 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Information and Specifications
Product Description 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standards, Documents, and References Used 2-1. . . . . . . . . . . . . . . . . . .
Characteristics and Specifications 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operator Performance Checks
Head Alignment Chart Diagnostic and Chart Quality 3-1. . . . . . . . . . . . .
Accessories and Options
Standard and Optional Accessories 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . .
Options 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Theory of Operations
Introduction 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Description 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Individual Write Command Operation 5-3. . . . . . . . . . . . . . . . . . . . . . . . .
Individual Read Command Operation 5-5. . . . . . . . . . . . . . . . . . . . . . . . .
Protocol 5-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interface Information 5-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Calibration
LCD Chart Diagnostic 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Check 6-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
vi YT-1 / YT-1S Chart Recorder
Maintenance
Required Tools 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preventive Maintenance 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Part Removal/Replacement 7-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 7-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mechanical 7-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical 7-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shipping Instructions 7-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replaceable Parts
Parts Ordering Information 8-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Replaceable Parts 8-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mechanical Replaceable Parts 8-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exploded View Diagram 8-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

YT-1 / YT-1S Chart Recorder vii
General Safety Summary
CAUTION. Do not operate this product without paper installed, or, if
operating when the paper runs out, shut the power off immediately.
Printing without paper might burn out the printhead.
Operator Safety Summary
Power Sources
This product is intended to operate from a power source supplied by
the parent instrument. Do not attempt to power this module by any
other means.
Grounding the Instrument
This product is grounded through the parent instrument. A protective
ground connection is essential for safe operation.
Danger Arising From Loss of Ground
Upon loss of the protective-ground connection, all accessible
conductive parts (including knobs and controls that appear to be
insulating) can render an electric shock.
Refer to connector changes to qualified service personnel.
Do Not Operate in Explosive Atmospheres
To avoid explosion, do not operate this product in an explosive
atmosphere unless it has been specifically certified for such
operation.

General Safety Summary
viii YT-1 / YT-1S Chart Recorder
Do Not Remove Covers or Panels
To avoid personal injury, do not remove the product covers or panels.
Do not operate the product without the covers and panels properly
installed.
Service Safety Summary
CAUTION. For qualified service personnel only. Refer also to the
preceding Operator Safety Summary.
Do Not Service Alone
Do not perform internal service adjustment of this product unless
another person capable of rendering first aid and resuscitation is
present.
Use Care When Servicing With Power On
Dangerous voltages exist at several points in this product. To avoid
personal injury, do not touch exposed connections and components
while power is on.
Disconnect power before removing protective panels, soldering, or
replacing components.

YT-1 / YT-1S Chart Recorder ix
Installation and Repacking
Unpacking and Initial Inspection
Before unpacking the YT-1/YT-1S from its shipping container or
carton, inspect for signs of external damage. If the carton is
damaged, notify the carrier. The shipping carton contains the basic
instrument and its standard accessories. Refer to the replaceable parts
list for a complete listing.
If the contents of the shipping container are incomplete, if there is
mechanical damage or defect, or if the instrument does not meet
operational check requirements, contact your local Tektronix Field
Office or representative. If the shipping container is damaged, notify
the carrier as well as Tektronix.
The instrument was inspected both mechanically and electrically
before shipment. It should be free of mechanical damage and meet or
exceed all electrical specifications. Procedures to check operational
performance are in the parent instruction service manual. Procedures
to check electrical and mechanical specifications are in the
Calibration section of this manual.
Power Source and Power Requirements
The YT-1/YT-1S is intended to be operated from the parent
instrument’s power supply. A protective ground connection by way
of proper installation in the parent instrument is essential for safe
operation.
Further information on the YT-1/YT-1S power requirements can be
found in the Operator Safety Summary and in the Operator section.
Repacking for Shipment
If the YT-1/YT-1S is to be shipped to a Tektronix Service Center for
service or repair, attach a tag showing the name and address of the
owner, name of the individual at your firm that can be contacted,
complete serial number, and a description of the service required. If