Hardware Troubleshooting
TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual
4–29
Troubleshoot the Benchtop Chassis
Follow the procedure in this section to identify the failed part within the chassis.
The following test equipment is recommended to perform these procedures.
H
Digital voltmeter (Tektronix DM250 series digital voltmeter)
H
Oscilloscope, 20 MHz BW, with 10x Probe with < 1-inch ground lead,
(Tektronix TDS400A or TDS500A series oscilloscope)
The fault isolation procedure requires that you:
H
Verify if the front-panel Standby/On button lights up.
H
Verify if the blower operates.
H
Measure voltages.
Front-Panel Standby/On button.
The Standby/On switch in the upper-right of the
front panel should light up when pressed. The blower in the rear should power
on.
NOTE
. Before replacing circuit boards, be sure to inspect all associated cables
and connectors for damage and proper installation.
+5VM
–12VM
–24VM
–2VM
+5VC
+12VC
+5VB
+12VM
+24VM
–5.2VM
+5VB
Figure 4–18: Rear-panel connector diagram
Equipment Required
Preparation
Summary of Contents for TLA 720
Page 13: ...Table of Contents viii TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual...
Page 22: ...Specifications...
Page 23: ......
Page 38: ...Operating Information...
Page 39: ......
Page 105: ...Command Groups 2 66 TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual...
Page 111: ...TEST Subsystem 2 72 TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual...
Page 124: ...Theory of Operation...
Page 125: ......
Page 128: ...Maintenance...
Page 129: ......
Page 155: ...Jumper Settings 4 26 TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual...
Page 178: ...Options...
Page 179: ......
Page 182: ...Diagrams...
Page 183: ......
Page 186: ...Replaceable Mechanical Parts...
Page 187: ......
Page 198: ...Replaceable Parts TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual 7 11...
Page 203: ...Replaceable Parts 7 16 TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual...
Page 204: ...Index...
Page 205: ......
Page 211: ...Index Index 6 TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual...
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Page 213: ......