Specifications

5-4 Maintenance TOS9220/9221
Symptom2: The POWER ON LED is lit, but the scanner does not
function.
Symptom3: Pressing the START switch with the contact check
function activated results in an immediate FAIL judg-
ment.
Possible cause Remedy
The SCAN terminal of the tester proper is
connected to the SCANNER OUT terminal of
the scanner.
• The interface cable is not connected correctly. Connect it
correctly by referring to "3.1 Connecting the Scanner
to the TOS9200/9201 Tester".
A channel not configured on the TOS9200/9201
tester is being used.
• Channels connected to test points must be set on the
tester proper.
For information on the procedure for setting channels,
see “Channel settings for the high-voltage scanner ” in
Chapter 3 “Basic Operations” of the Operation Manual
for the TOS9200/9201 Tester.
Possible cause Remedy
A high-voltage lead for parallel connection is
disconnected.
• Connect the high-voltage leads properly by referring to
"3.1 Connecting the Scanner to the TOS9200/9201
Tester".
The OUTPUT A and B terminals are not
connected to the corresponding test point, or a
wire is disconnected in any of the connections
(TOS9220 only).
• Install or reconnect the leads properly and securely by
referring to "3.3 Connecting the TOS9221 Scanner to
the DUT".