JMA-5300MkIIsm

INDEX > 4.Replacement Procedure > 4.2 Scanner Unit NKE-1130 (JMA-5332-12)
2) Open the T/R control circuit board cover
to the front (see Section 4.2.10, page 4-
14) to remove the cables connected to the
receiving unit. Remove the four screws
(M5) holding the receiving unit flange,
the two screws (M5) holding the metal
fixture, and the screw at the right side of
the receiving unit to replace the receiving
unit.
3) Attach the metal fixture attached to the
flange removed from the old receiving
unit and put it onto the new receiving unit.
Remove the six screws.
Metal fixture
(reused for the new
receiving unit)
Remove the cables
Loosen the two screws.
4
4) After replacing the receiving unit, assemble the unit in the reverse order of the
disassembly procedure.
Do not forget to tighten the screws and connect the cables.
[Check points]
1) Turn on the radar power supply. After the countdown is completed, start emission and
check that the radar image appears without error.
Transmit radar signals on a long range (48NM) and open the serviceman menu to perform
tuning adjustment (Refer to Section 7.1.3 of the instruction manual). Adjust the setting in the
serviceman menu until the tuning indication bar on the display unit reaches the 8th calibration
marking.
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