70 PCR-M
Chapter 5 Maintenance
■ A portion or all of the control panel do not work.
■ The output voltage waveform is distorted.
■ The voltage does not change even when the rotary knob is turned when the PCR-M is
showing the measured value display.
■ The DC output cannot be set to negative voltage.
■ The PCR-M does not switch to local mode even when the local key is pressed.
Check Item Check Possible Cause Remedy
Is the KEYLOCK LED
illuminated?
Ye s Key lock is enabled.
Release the panel lock.
section 3.10, “Locking (Prohibiting)
the Panel Operation.”
Is the input voltage within the
rated range?
No Abnormal input voltage
Set the input voltage so that it is within the
rated voltage range.
Is there a device generating
strong noise nearby?
Ye s
Erroneous operation due to
noise
Move the PCR-M away from the noise
source.
Is the REMOTE LED
illuminated?
Ye s
The PCR-M is controlled
via the RS232C, GPIB, or
USB interface.
This is a normal behavior. To control the
PCR-M from the panel, press the LOCAL
key to enable local mode.
Are the voltage limit and
frequency limit within the
selectable range?
No
The limit values are not set
correctly.
Set the limit values correctly.
section 3.7, “Setting the limit value.”
Check Item Check Possible Cause Remedy
Is OVER LOAD illuminated?
Ye s
The overload
protection tripped.
The PCR-M may be overloaded.
Check the load.
No Malfunction
Immediately stop the use of the instrument
and request repairs.
Check Item Check Possible Cause Remedy
Did you press the F, LIMIT, or
CONFIG key after pressing the
V key?
Ye s
The rotary knob is
disabled.
Press the V key twice again.
The voltage changes on the measured value
display.
Check Item Possible Cause Remedy
Is the voltage lower limit set to
a negative value?
No
The limit value is not
set correctly.
Set the voltage lower limit to a negative value.
section 3.7, “Setting the limit value.”
The factory default voltage lower limit of DC
mode is 0.0 V.
Check Item Possible Cause Remedy
Was a local lockout (LLO)
command sent via the
communication interface?
Ye s
Local key operation
disabled by local
lockout (LLO).
Use a communication command to clear the
local lockout (LLO) command.
See
See
See
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