JMA-5300MkIIsm

INDEX > 4.Replacement Procedure > 4.3 Scanner Unit NKE-2254 (JMA-5322-7/9/6HS)
[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.
4.3.10 Encoder replacement (CHT-71A)
[Required tools]
• A Phillips screwdriver for 4 mm screws
• A Phillips screwdriver for 5 mm screws
• A wrench (width across flats 7 mm, for M4 screws)
• A wrench (width across flats 8 mm, for M6 screws)
• Tools for removing the cover from the scanner unit
(see Section 4.3.1, page 4-24)
4
[Replacement procedure]
1) Remove the cover on the right (starboard)
side (see Section 4.3.1, page 4-24), remove the
cables connected to the transmitter-receiver
unit and the screws (three M5 screws)
holding the transmitter-receiver unit in
place, and remove the transmitter-receiver
unit.
Remove the
five cables.
Remove the
three screws.
4-39