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Troubleshooting
6- 70
TLA721 Benchtop & TLA7XM Expansion Mainframe Service Manual
No
Begin
Front panel
LED on?
Remove all modules
except the controller.
Turn on the mainframe
power switch.
No
Yes
Blower
operates?
Yes
Blower
operates?
Supply
voltages OK?
No
Yes
No
Yes
Yes
Check for failure at blower
(Fan) control board,
blower cable, or blower
No
No
Yes
Power off mainframe.
Mainframe OK.
Check for failure at
power supply,
backplane board
(blown fuse or bad board)
No
Yes
Power cord
connected to
mainframe and
power source?
Rear-panel
fuse closed?
Yes
No
Replace
rear-panel
fuse.
Plug in cord at
both ends
Check for failure at
power supply
Check for failure at
front-panel LED,
LED cable from LED to J22 on
backplane board, or
series resistor (R60) on enhanced
monitor board (49.9
Ω)
+5VM
voltage OK?
Supply
voltages OK?
Figure 6- 32: Mainframe troubleshooting tree
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 ...