Troubleshooting
TLA721 Benchtop & TLA7XM Expansion Mainframe Service Manual
6- 69
expansion mainframes and that the benchtop controller is fully functional. You
can use these procedures to also troubleshoot the expansion mainframe once you
have isolated problems to the mainframe itself.
Most of the problems in the mainframe can be isolated to power supply problems
or to cooling problems. If the front panel Standby/On switch lights up when you
turn the switch on, you should verify that the blower operates and then check the
power supply voltages. You can also isolate problems in the mainframe by using
the troubleshooting tree shown in Figure 6--32.
You can easily check the power supply voltages by following the
Checking the
Power Supply Voltages
beginning on page 4--6. If the power supply voltages are
not correct, this could be due to several reasons:
H
Open fuses
H
Faulty power supply
H
Faulty modules. Remove the modules and try the power supply checks
again. Alternately, try installing a known-good module.
If there is a cooling problem, check for the following:
H
Blower not working properly
H
Faulty shutters. Verify that all of the empty slots in the mainframe are closed
when no modules are installed. If necessary replace the shutters.
H
Verify that the instrument has adequate clearance near the ventilation holes
around the instrument.
H
If the instrument has shut down due to overheating, and you have exhausted
all other troubleshooting suggestions, you may have a faulty controller;
replace the controller module.
Power Supply Problems
Inadequate Cooling
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 ...