FujiFilm PROFECT CS Service Manual page 400

14.7.5 Loopback Test - 3
1.
Connect the jig (898Y0981) to the LAN cable.
u NOTE u
If a hub is connected between the RU and jig, the loopback test cannot be
performed.
2.
Perform the loopback test.
{MT:14.7.2_Loopback Test Procedure}
3.
Remove the jig and then connect the LAN cable to the RU.
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CR-IR 363 Service Manual
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