Quick Start Guide

7.1 Troubleshooting
82
Disposing of the Instrument
Before returning for repair
This instrument includes a lithium battery to retain settings. Remove this battery
before disposing of the instrument. Also remove the optional Model 9719 Mem-
ory Backup Unit, if installed.
See "Appendix 6 Disposing of the Instrument" in the Instruction Manual
If Power and Operating Keys Malfunction
Symptom Check Item, or Cause Remedy and Reference
The display does not
appear when you turn the
power on.
Is the power cord disconnected?
Are connections made correctly?
Verify that the power cord is connected prop-
erly.
"3.4 Connecting the Power Cord" (
⇒ p. 45)
Keys do not work.
• Is any key being held down? • Verify key operation.
• Is the key-lock state active (Key-Lock
message displayed)?
• Deactivate the key-lock state.
(Hold the
CURSOR keys for three
seconds)
• Is remote control from a PC over the
Web enabled?
• Press the SET key to release the key-
lock.
If the Display or Operations Malfunction
Symptom Check Item, or Cause Remedy and Reference
A waveform does not
appear when you press
the START key.
• Is the “Pre-Trig Wait” message dis-
played?
• Is the “Trigger Wait” message dis-
played?
When pre-triggering is enabled, triggering is
ignored until the pre-trigger portion of the
waveform has been acquired.
Recording starts when a trigger occurs.
No changes occur in the
displayed waveform.
• Is the clamp sensor or connection
cable connected correctly?
• Is the measurement range set prop-
erly?
• Is the low-pass filter enabled?
Verify that the clamp sensor or connection
cable is connected correctly.
"Chapter 2 Connections" in the Input
Module Guide
Verify the input channel settings.
While measuring with the
memory function, the dis-
played frequency is much
lower than the actual fre-
quency.
Aliasing may be occurring.
Change the timebase to use a faster sam-
pling rate.
"Appendix 4 Supplemental Technical Infor-
mation" in the Instruction Manual
Some channels are unus-
able.
Is the channel enabled for use?
"4.2.1 Selecting Channels to Use" in the
Instruction Manual
The displayed waveform
size does not change
when the input range is
changed.
Is the Variable function enabled?
Turn the Variable function off.
"8.9.4 Setting Arbitrary Waveform Height
and Position on the Vertical (Voltage) Axis
(Variable Function)" in the Instruction
Manual