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Troubleshooting
TLA721 Benchtop & TLA7XM Expansion Mainframe Service Manual
6- 53
Table 6- 9: Failure symptoms and possible causes
Symptom
Possible causes and recommended action
Mainframe does not power-on
Verify that all power cords are connected to the mainframe and to the power source.
Check that the mainframe receives power when you press the On/Standby switch.
Check that fans start and that front-panel indicators light.
Check that power is available at the power source.
Check for failed fuses.
Mainframe failure: contact your local Tektronix service center.
Expansion mainframe does not
power-on
Verify that all power cords are connected to the expansion mainframe and to the power source.
Check that all of the TLA 7XM expansion modules are firmly seated, and that the mounting
screws on the TLA 7XM expansion modules are tightened.
Check that the cables between the mainframe and the expansion mainframe are correctly
connected: A
→
A, B
→
B, and C
→
C.
Check that the TLA 7XM expansion module is in slot 0 of the TLA 7XM expansion chassis.
Check that power is available at the power source.
Check for failed fuses.
Expansion mainframe failure: contact your local Tektronix service center.
Front panel power switch light comes
on but the blower will not operate
Check for faulty blower cable.
Check for defective bower.
Power supply failure: contact your local Tektronix service center.
Monitor does not power-on
Check the monitor power cord connection.
Check for failed fuse.
Monitor connected to Secondary Video Out port and dual monitor operation not enabled. Ensure
that the monitor is connected to the Primary Video Out port and that dual monitor mode is
enabled.
Monitor failure: contact the vendor of your monitor for corrective action.
Monitor display is blank
Check that the monitor is connected to the mainframe; replace the cable if necessary.
If the monitor connected to the Primary Video Out port is blank, try connecting another monitor
to the Secondary Video Out port; if both displays are blank, contact your local Tektronix service
center.
External monitor controls turned down; adjust monitor controls for brightness and contrast.
Check the controller BIOS setups for the monitor.
Faulty monitor; contact the vendor of your monitor for corrective action.
Summary of Contents for TLA7XM
Page 5: ......
Page 13: ...Table of Contents viii TLA721 Benchtop TLA7XM Expansion Mainframe Service Manual ...
Page 17: ...Service Safety Summary xii TLA721 Benchtop TLA7XM Expansion Mainframe Service Manual ...
Page 21: ...Preface xvi TLA721 Benchtop TLA7XM Expansion Mainframe Service Manual ...
Page 25: ...Introduction xx TLA721 Benchtop TLA7XM Expansion Mainframe Service Manual ...
Page 43: ...Specifications 1 18 TLA721 Benchtop TLA7XM Expansion Mainframe Service Manual ...
Page 85: ......
Page 87: ...Adjustment Procedures 5 2 TLA721 Benchtop TLA7XM Expansion Mainframe Service Manual ...
Page 161: ...Repackaging Instructions 6 74 TLA721 Benchtop TLA7XM Expansion Mainframe Service Manual ...
Page 165: ...Electrical Parts List 8 2 TLA721 Benchtop TLA7XM Expansion Mainframe Service Manual ...
Page 169: ...Diagrams 9 4 TLA721 Benchtop TLA7XM Expansion Mainframe Service Manual ...
Page 189: ...Mechanical Parts List 10 20 TLA721 Benchtop TLA7XM Expansion Mainframe Service Manual ...