Sakai R2H-2, Shop Manual

Page: 87 / 151

10-008
TROUBLESHOOTING
2-2) Measuring current flowing from equipment B to equipment A
(measuring current between terminal 2 of equipment B and terminal 1 of equipment A)
3 4 2 5 1
2 3 1
2 3 1
1 2 3 3 2 1
Ammeter
(tester)
Main power source
of equipment B
Ground of
equipment A
Signal from
equipment A
Power to
equipment A
Equipment B
Equipment A
GW750‑2‑10008
Harness
(connecting
terminals)
Equipment B
Test harness
Equipment A
The test harness connects the
corresponding terminals other
than those to be measured.
Inspection procedure
①
Disconnect the connector of equipment A and connect the test harness.
②
Connect the test probe (+) to connector terminal 1 (harness side) of equipment A and the test probe (-)
to connector terminal 1 (equipment side) of equipment A and measure the current. Note that reversing
the connector terminals between the probes (+) and (-) changes the result of the measurement. Be sure
to connect the probe (+) to the power source side and the probe (-) to the ground side.
Measurement method
When measuring the current, connect the tester in series to the portion to be measured. Because the
current cannot be measured when the connector is connected in position, disconnect the connector to allow
the test probe to connect between the terminals.