Furuno 1734C Service Manual

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8. MAINTENANCE, TROUBLESHOOTING 
 8-3
8.4  Replacing the Magnetron 
When the magnetron has expired, distant targets cannot be seen on the display. When you 
feel that long range performance has decreased, contact a FURUNO agent or dealer about 
replacement of the magnetron. 
 
Radar model and magnetron used 
Model Magnetron 
Type 
Code 
No. 
MODEL 1724C 
E3588 
000-146-866 
MODEL 1734C 
E3571 
000-146-867 
 
8.5 Simple 
Troubleshooting 
This section provides simple troubleshooting procedures which the user can 
follow to restore normal operation. If you cannot restore normal operation do not 
attempt to check inside the unit. Any trouble should be referred to a qualified 
technician.  
 
8.5.1 General 
General troubleshooting 
If… Then… 
you cannot turn on the 
power 
• 
check for blown fuse. 
• 
check that the power connector is firmly fastened. 
• 
check for corrosion on the power cable connector. 
• 
check for damaged power cable. 
• 
check battery for proper voltage output (10.8 to 31.2 V). 
there is no response 
when a key is pressed 
• 
turn off and on the power. If there still is no response the key may 
be faulty. Request service.