Reception Trouble-1) No Reception - Furuno NX-700B Service Manual

2. Reception trouble-1) No reception

No reception
Yes
Can receiving monitor sounds be heard?
Yes
Are the receiving frequency, the receiving
stations and message types set properly?
Yes
Check the RX Test.
Are the results of RX Test OK on all frequencies
of 518 kHz, 490 kHz, and 4209.5 kHz?
Yes
Is voltage of +9 VDC applied to the
antenna terminal on NX-7001?
Yes
Failure of antenna unit NX-7H
Check it in the following setting.
No
- Ver-02.01
- Ver-01.02
No
Check monitor sounds in the following setting:
[MENU] -> System -> Signal monitor
No
To check the currently receivable stations and message types:
[MENU] -> Initialize 1 -> Available Rcv Station List
No
The Rx Test is executed in the following setting:
[MENU] -> Service -> Test
Note: To set the received frequency:
[MENU] -> NAVTEX -> Local channel
No
Reference :
Check if reception is enabled when the antenna
is switched to FAX-5 used for the FAX
receiver or MF/HF WR, where practical.
7-22
[MENU] -> NAVTEX -> Mask Mode -> Manual
[MENU] -> NAVTEX -> Receiver Mode -> Manual
1. Check the cable between the Receiver unit
and the Display unit.
2. The problem may be caused due to the failure
of the RCV board or the CPU board.
To set the received frequency:
[MENU] -> NAVTEX -> Local channel
To set the station and message type:
Ver-02.01
[MENU] -> NAVTEX -> Rcv Mask
Ver-01.02
[MENU] -> NAVTEX -> Rcv Station & Msg.
The problem may be caused due to the failure
of the CPU board or the RCV board.
If the test results are OK on any frequency, the
problem is caused due to the failure of the RCV
board.
The problem may be caused due to the failure of
the RCV board.
7.7 Troubleshooting