NF DP015S, Instruction Manual

Page: 248 / 304

8. Troubleshooting
PROGRAMMABLE AC POWER SOURCE 230
Table 8-3 Actions When a Failure is Suspected (Continued)
Category Symptom Possible Cause Necessary Actions
The line
synchronization
cannot be set. The signal source is not
set to SYNC. Set the signal source to SYNC and
the external synchronization
signal source to LINE.
→
4.19
Problem at
output setting
The output on
state cannot be
achieved. An error message is
on-screen. The output cannot be turned on
while there is an error message. If
the protection function is
activated, remove the cause (see
8.1.2 ). Press the ENTER key to
clear the error message. When the
message says "System Locked",
cycle the power.
The state is the output
off (the OUTPUT key
LED illuminates) Press the OUTPUT key to turn the
output on.
The output voltage is
set to zero. Check for the output voltage
setting.
→ 3.4.4
,
3.4.5
The external signal
source is not
connected.
The output
voltage does not
come up.
The external input gain
is zero.
When the signal source is EXT,
ADD, or VCA, connect the signal
source to the external signal input
terminal, and set the external input
gain appropriately.
→
4.17 , 4.20
The output coupling
mode is the DC mode. The front output outlet can be
used only in the AC mode or
ACDC mode. The output does not
appear in the DC mode. There is no
output from the
outlet on the
front.
The output voltage
range is 200 V. The Japan/North America type
outlet can be used only in the 100
V range. The output does not
appear in the 200 V range.
When the
external signal
is amplified on
EXT or ADD,
the waveform is
distorted and
the intended
output is not
provided. The output coupling
mode is the AC mode. In the AC mode, the waveform
may be distorted as the DC
component removal function
works. Use in the ACDC mode.
Unnecessary items are
set (for example, the
AC voltage setting
remains for the DC
output). Check for the setting again. In the
ADD mode, check on the external
input signal and gain setting as
well.
→
4.20
Output-related
problem
The measured
voltage is
different from
the setting
value.
The limiter is activated
(the limiter icon is
displayed). For a load with lower impedance,
the limiter is activated to make the
output lower than the setting
value. Check on the limiter
setting.
→
4.1