Instructions
050-3264-01
Fan Replacement Kit
TLA721/7XM Series Logic Analyzers
075-0152-01
Warning
The servicing instructions are for use by qualified
personnel only. To avoid personal injury, do not
perform any servicing unless you are qualified to
do so. Refer to all safety summaries prior to
performing service.
www.tektronix.com
*P075015201*
075015201
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Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes
that in all previously published material. Specifica tions and price change privileges reserved.
Tektronix, Inc., P.O. Box 500, Beaverton, OR 97077
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
General Safety Summary
Review the following safety precautions to avoid injury and prevent damage to
this product or any products connected to it.
To avoid potential hazards, use this product only as specified.
Only qualified personnel should perform service procedures.
While using this product, you may need to access other parts of the system. Read
the General Safety Summary in other system manuals for warnings and cautions
related to operating the system.
ToAvoidFireor
Personal Injury
Use Proper Power Cord. Use only the power cord specified for this product and
certified for the country of use.
Ground the Product. This product is grounded through the grounding conductor
of the power cord. To avoid electric shock, the grounding conductor must be
connected to earth ground. Before making connections to the input or output
terminals of the product, ensure that the product is properly grounded.
Observe All Terminal Ratings. To avoid fire or shock hazard, observe all ratings
and markings on the product. Consult the product manual for further ratings
information before making connections to the product.
Do not apply a potential to any terminal, including the common terminal, that
exceeds the maximum rating of that terminal.
Do Not Operate Without Covers. Do not operate this product with covers or panels
removed.
Use Proper Fuse. Use only the fuse type and rating specified for this product.
Avoid Exposed Circuitry. Do not touch exposed connections and components
when power is present.
Do Not Operate With Suspected Failures. If you suspect there is damage to this
product, have it inspected by qualified service personnel.
Do Not Operate in Wet/Damp Conditions.
Do Not Operate in an Explosive Atmosphere.
Keep Product Surfaces Clean and Dry.
Provide Proper Ventilation. Refer to the manual’s installation instructions for
details on installing the product so it has proper ventilation.
TLA721/7XM Fan Replacement Kit
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General Safety Summary
Symbols and Terms
Terms in this Manual. These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices that could result
in injury or loss of life.
CAUTION. Caution statements identify conditions or practices that could result in
damage to this product or other property.
Terms on the Product. These terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you read the
marking.
WARNING indicates an injury hazard not immediately accessible as you read the
marking.
CAUTION indicates a hazard to property including the product.
Symbols on the Product. The following symbols may appear on the product:
CAUTION
Refer to Manual
Standby
WARNING
High Voltage
Breakable.
Do not drop.
Protective Ground
(Earth) Terminal
Chassis Ground
Mains Disconnected
OFF (Power)
Mains Connected
ON (Power)
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TLA721/7XM Fan Replacement Kit
Service Safety Summary
Only qualified personnel should perform service procedures. Read this Service
Safety Summary and the General Safety Summary before performing any service
procedures.
Do Not Service Alone. Do not perform internal service or adjustments of this
product unless another person capable of rendering first aid and resuscitation is
present.
Disconnect Power. To avoid electric shock, switch off the instrument power, then
disconnect the power cord from the mains power.
Use Care When Servicing With Power On. Dangerous voltages or currents may
exist in this product. Disconnect power, remove battery (if applicable), and
disconnect test leads before removing protective panels, soldering, or replacing
components.
To avoid electric shock, do not touch exposed connections.
TLA721/7XM Fan Replacement Kit
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Service Safety Summary
iv
TLA721/7XM Fan Replacement Kit
Kit Description
This kit is used to replace the cooling fan in the back of TLA721 and TLA7XM
instruments. If your instrument contains an early-version monitor board, the
adapter cable in this kit is used to adapt the replacement fan to the older board.
This document supports Tektronix modification: ECR 30098
Products
TLA721 All
TLA7XM All
Minimum Tool and Equipment List
Required tools and equipment Part number
Torx screwdriver with T-15 and T-20 tips n/a
Phillips #1 screwdriver n/a
Kit Parts List
3/32-inch Allen wrench (hex wrench) n/a
Circuit/figure
number
Quantity Part number Description
1ea 050-3264-01 Parts Repl Kit: TLA721/7XM Fan
119-7089-00 Fan
119-7076-00 Adapter cable
075-0152-01 Instructions
TLA721/7XM Fan Replacement Kit
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Kit Description
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TLA721/7XM Fan Replacement Kit
Installation Instructions
These instructions are for qualified service personnel who are familiar with
servicing the product. If you need further details for disassembling or reassembling the product, refer to the appropriate product manual. Contact your nearest
Tektronix, Inc., Service Center or Tektronix Factory Service for installation
assistance.
CAUTION. To prevent static discharge damage, service the pr oduct only in a
static-free environment. Observe standard handling precautions for static-sensitive devices while installing this kit. Always wear a grounded wrist strap,
grounded foot strap, and static resistant apparel while installing this kit.
Remove the Fan Assembly
You will need a P hillips #1 screwdriver and an Allen wrench to complete these
procedures.
Removal
To remove the fan assembly, refer to Figures 1 through 3 while performing the
following steps:
1. Power off the instrument and disconnect the power cord.
2. From the back of the chassis, unscrew the captive screw that attaches the
cable cover (see Figure 1 on page 4). Remove the cable cover and set it
aside.
3. Unplug the fan cable by squeezing the tab on the connector.
4. Unscrew the two captive screws that attach the monitor board to the chassis.
5. Slide the monitor board out of the chassis.
6. If the monitor board part number is 671--3982--XX, move the jumper at J19
(near the bottom of the board) from pins 2--3 to pins 1--2.
TLA721/7XM Fan Replacement Kit
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Installation Instructions
NOTE. If access to the back of the chassis is difficult, you can remove the entire
fan assembly by removing the five captive screws for the fan housing. Then,
move the fan assembly to a more convenient location.
8-32 Captive
screw for fan
housing (5)
Figure 1: Location of screws for fan assembly removal
8-32 Captive screw
for Enhanced
Monitor board (2)
8-32 Captive
screw for cable
cover
7. To remove the fan, remove the ten Allen screws holding the shroud part of
the fan assembly to the chassis part of the assembly. There are three screws
on each side and four on the bottom (see Figure 2 on page 5). Set the
shroud aside.
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TLA721/7XM Fan Replacement Kit
Installation Instructions
Chassis
Chassis bracket
Screws (2)
Fan
Cable tie
Shroud
Screws (4)
Fan assembly
Screws (6)
Y--Bracket
Screws (4)
Figure 2: Removing the fan assembly
8. Remove the four screws that hold the fan to the chassis part of the fan
assembly.
Install
CAUTION. If you have not removed the entire assembly from the chassis, be
careful to support the fan so that it does not drop when you remove the two sheet
metal scr ews in the next step.
9. Remove the two sheet metal screws at the top of both sides of the fan. Note
the location of the chassis bracket (between the fan and the “Y” brackets).
Install the new fan assembly and cable adapter by following these steps:
1. On the new fan, remove the two sheet metal screws from the same locations
as you did on the old fan in step 9. Mount the new fan with the chassis
bracket inserted between the fan and the “Y” brackets where you removed
the screws, and then reinstall the two sheet metal screws.
2. Install the four screws that hold the fan to the chassis part of the fan
assembly.
3. Reinstall the fan shroud with the ten Allen screws.
TLA721/7XM Fan Replacement Kit
5
Installation Instructions
4. If the monitor board part number is 671--3982--XX, then slide the monitor
board into the chassis and secure it with the two screws. Plug the cable
adapter that came with the kit into J8, 1/BLOWER on the monitor board.
Bend the cable adapter towards the fan at the shrouded connector end.
SeeFigure3.
5. If the monitor board part number is not 671--3982--XX, install the monitor
board, plug the fan cable directly into J8, 1/BLOWER, and proceed to
step 7.
NOTE. When reconnecting the fan cables to the chassis, verify that you connect
the fan cable (or cable adapter) to J8, 1/BLOWER.
Monitor board
Verify Operation
Bend towards fan
J8,
1/BLOWER
Fan cable (Plug directly to board if
board P/N is not 671--3982--XX)
Cable adapter (only use with
board P/N 671--3982--XX)
Figure 3: Attach the fan cable (and cable adapt er, if necessary)
6. Plug the fan cable into the cable adapter and push the excess cable into the
fan shroud. Dress the excess cable away from the fan blades.
7. Install the cable cover and tighten the screw.
1. Connect the power cord to an appropriate source.
2. Power on the instrument and check for proper fan operation.
g End of document g
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TLA721/7XM Fan Replacement Kit
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