JRC JMR-92 Series Field Service Manual page 671

Marine radar equipment, ecdis conning display
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4.3.8.7
Replacing the Radar interface circuit: RIF CQD-2273
[Required Tools]
The tools shown in the following table are required for replacement work.
No.
Name
1
Flat head
screwdriver
2
Phillips screwdriver
3
Diagonal pliers
4
Cable-tie *2
*1 Use for TB840 on the RIF if NKE-2254-6HS or NKE-2103-6/-6H type scanner unit has been
installed.
*2 A number of cable-ties may be required.
Before conducting replacement work, turn OFF the circuit breaker for the power supply of the
display unit.
Before replacement work, be sure that all the LEDs on the front of the PSU NBD-913
are unlit. Charged electricity may still remain in the internal capacitor.
Do not lose the screws as they will be needed again.
To prevent damage to the Unit during the replacement work, cut off cable-ties that fasten the
cable of the unit beforehand.
Step 1
Remove the front cover of the display unit mount kit and the lid of
the JB.
Remove the front cover of the display unit mount kit and the lid of the JB. For more information
about the removal procedure, refer to "Replacing the Fuses of the Serial LAN Interface Circuit:
SLC CMH-2370."
Chapter 4 Replacement procedure
Table Required Tools
Size
2 mm, 4 mm
, 6 mm
*1
Size #2
4-450
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