Furuno FS-1503 - Manual (Page 36)

5-3
5.2 Errow Indication
When the FS-1503 detects a fault in the synthesizer unit (frequency unlocked),the frequency or
channel number blinks.
5.3 Replacing Fuses
To protect the unit from overcurrent and equipment fault,two 30 A are provided in snap-in
holders on the power cable. If a fuse blows,find out the cause before replacing it. If it blows
again after replacement,request service.
WARNING
Use the proper fuse.
Fuse rating is shown on the equipment.
Use of a wrong fuse can cause equipment
damage and void the warranty.