286 User’s Manual TOS93 Series
Appendix | Troubleshooting
Unable to start a test
Unable to measure
Symptom Possible cause Remedy See
“PASS,” “U-FAIL,” or “L-
FAIL” is displayed.
A judgment result is displayed. Press STOP to clear the judgment
result.
–
“PROTECTION” is dis-
played.
A protection function is activated. Clear the protection mode.
p.22
“CONTACT FAIL” is dis-
played.
When a scanner was connected
with Contact Check set to on, a bad
test lead connection was detected.
Connect the test leads properly.
p.28
(TOS9303LC only) The test leads
are grounded when the touch cur-
rent (TC) test condition Probe is set
to Enc-Liv or Enc-Neu.
When Probe is set to Enc-Liv or
Enc-Neu, connect the test leads to a
location on the EUT that is not
grounded.
p.107
Testing does not begin
when the START switch
is pressed.
A test lead is connected to the
REMOTE connector.
Remove the test lead, or press the
START switch on the test lead.
–
In CONFIG settings, Double Action
or Start Long is set to on.
Start the test properly, or set Double
Action and Start Long to off.
p.227
A STOP signal is applied to SIGNAL
I/O.
Turn off the STOP signal.
p.207
The SIGNAL I/O ENABLE signal is
set to low level.
Set the ENABLE signal to high level.
p.207
(TOS9303LC only) In an LC test,
Line OUT is set to on.
Set Line OUT to off.
p.242
Symptom Possible cause Remedy See
The measured values are
abnormal.
The test leads are connected to the
wrong terminals.
Connect the test leads properly. –
(TOS9303LC only)
A wrong measurement circuit net-
work is being used.
Use the correct measurement circuit
network as specified by the standard
to make the measurement.
–
(TOS9303LC only)
Voltage conversion (Conv Voltage)
is set to on.
Turn off Conv Voltage when measur-
ing the voltage supplied to the EUT.
–
(TOS9303LC only)
Unstable data when the EUT is
starting is being measured.
Set the judgment delay (Judge
Delay) to an appropriate value.
–
Test data for pass judg-
ments cannot be saved.
The pass judgment result display is
cleared immediately.
Set the Pass Hold time to an appro-
priate value.
p.228
Judgments do not begin. Judgment delay (Judge Delay) is
set.
Judgment begins after the Judge
Delay elapses. Set Judge Delay to
an appropriate value.
–
Testing does not finish. The test timer is set to off. The test continues until the STOP
switch is pressed. Turn the test timer
on, and set an appropriate timer
value.
–
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