JRC JSS-296 Service Manual page 171

NCU-331 DC Breaker Addition procedures
Add the DC Breaker to GMDSS CONSOLE (NCU-331E/F/G) referring to the
following procedures.
Connection Diagram
NAH-692/695/698
Power Amplifier
AUX PS
NCU-331
TB101
Procedure
(1) Turn off AC and DC switches on POWER AMPLIFIER (NAH-692/695/698).
(2) Disconnect cables between NCU-331 and ship's battery.
To avoid fire, electric shock and/or whatever malfunction of the
equipment, be sure to disconnect the cables.
voltage at DC input terminals if the battery output is certainly shut
off referring to (6) paragraph mentioned below.
(3) Unscrew twelve screws of the front panel.
BATT
Add DC Breaker
3 4 5 6
+ + - -
BATT
CAUTION
NAH-692/695/698
Power Amplifier
AUX PS
NCU-331
TB101
- 1 -
Jan 8, 2005
BATT
S1
DC Breaker
3 4 5 6
+ + - -
BATT
Further, confirm