Malfunction? First, Investigate - YOKOGAWA TA220 User Manual

Chapter 12 Troubleshooting and Maintenance

12.1 Malfunction? First, Investigate.

Description
The power does not turn
ON.
Nothing is displayed.
Display 2 (green) is dim.
The display is not correct. The system has malfunctioned.
Keys do not work.
Cannot make
measurements.
Cannot take
measurements.
The DC output is not
correct.
IM 704610-01E
• For the appropriate corrective actions when an error code is shown on the display,
see section 12.2.
• If servicing is necessary, or if the instrument is not operating correctly after performing
the following corrective actions, contact your nearest YOKOGAWA dealer for repairs.
Possible Problem
Using a power supply outside the ratings. Use a correct power supply.
Fuse blown
Display of numerical values/alphabetical
characters is turned OFF.
The brightness is set low.
Noise appears on the display.
The ambient temperature or humidity is
outside the specifications.
Key lock is ON.
The TA220 is in remote mode.
The trigger mode/slice level is not correct. Set them correctly.
RF signal is not being input correctly.
The measurement range is exceeded.
Arming is not appropriate.
Inhibit is not appropriate.
Can only set the trigger mode to MAN.
Can not set the number of block samples Increase the gate time.
as desired.
The average coefficient setting for the DC Turn OFF D-to-C high speed calculation. 4.9, 7.1
output filter is not reflected in the output
values.
The RF signal voltage level is not DC-
output.
Corrective Action
Replace the fuse
Turn display of numerical values/
alphabetical characters ON.
Adjust the brightness.
Reboot the system.
Install the TA220 where there is no
noise.
Remove the noise.
Install the TA220 in a place that meets
the specifications.
Turn OFF the key lock.
Set the TA220 in local mode.
Input the RF signal correctly.
Check the measurement range.
Check arming.
Check inhibit.
Turn ON AGC.
Turn OFF D-to-C high speed calculation. 4.9, 7.2
Ref. section
3.3
12.8
5.2
11.3
3.4
3.2
—
3.2
11.4
8.2, 9.1
4.4
3.5, 3.6,
4.2, 4.3
4.1, 13.2
4.6
4.8
4.4, 4.9
4.5, 4.7
12
12-1