JMA-5300MkIIsm

INDEX > 4.Replacement Procedure > 4.2 Scanner Unit NKE-1130 (JMA-5332-12)
4.2.7 Modulation Circuit replacement (CPA-264)
[Required tools]
• A Phillips screwdriver for 4 mm screws
• Tools for removing the cover from the scanner unit
(see Section 4.2.1, page 4-2)
[Replacement procedure]
1) Remove the cover on the left (port) side (see Section 4.2.1, page 4-2) to remove all
cables connected to the Modulator circuit board (CPA-264).
2) Remove the two screws (M4) holding the
metal sheet and the radiating plate of the
Modulator circuit board and the six screws
(M4) holding the Modulator circuit board, to
replace the Modulator circuit board.
3) After replacing the Modulator circuit board,
assemble the unit in the reverse order of the
disassembly procedure.
Modulator circuit board
金 具
Remove the two
screws.
Remove
the six
screws.
4
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 with the test menu open, also make sure
the magnetron current is shown between the 6th and 9th calibration markings (see Section
6.1.1, page 6-1).
4-11