522142
71
Zoom out
Zoom in
Previous page
1/97
Next page
7. MAINTENANCE, TROUBLESHOOTING
7-2
7.2 Troubleshooting Chart
Symptom Probable cause Remedy
Transceiver cannot
be powered.
No DC voltage to the transceiv-
er, or blown fuse
Check the 10.8 - 15.6 VDC battery con-
nections and the fuse.
The (power) button needs to be
pressed and held to turn the radio on.
Transceiver blows
fuse when connected
to power supply.
Reversed polarity of power
wires
Check the power cable for DC voltage, or
replace the fuse (6A 250 V).
Make sure the red wire is connected to
the positive (+) battery post, and the black
wire is connected to the negative (-) bat-
tery post. If the fuse still blows, contact
your dealer.
Popping or whining
noise from the speak-
er while engine runs.
Engine noise Reroute the DC power cable away from
the engine. Add a noise suppressor on
power cable. Change to resistive spark
plug wires and/or add an alternator whine
filter.
Sound is not emitted
from the internal or
external speaker.
Accessory cable Check the connections of the accessory
cable for short circuit on external speaker
cable (WHITE & SHIELD).
Sound is not emitted
from the PA speaker.
Accessory cable Check the connections of the accessory
cable for short circuit on PA speaker ca-
ble. (RED & SHIELD).
Receiving station re-
ports low transmit
power, even with
HIGH power.
Antenna Have the antenna checked or test the
transceiver with another antenna. If the
problem persists, contact your dealer.
The message "HI
BATTERY" or "LO
BATTERY" appears
when the power is
turned on.
The power supply voltage is too
high or too low.
Confirm that the connected power supply
voltage is within 10.8 - 15.6 VDC.
Your position is not
displayed.
Accessory cable. Check the accessory cable connection.
Setting of the GPS receiver Check the output signal format of the
GPS receiver. This radio requires the
GLL, RMB, or RMC sentence as an out-
put signal. If baud rate and parity can be
set on the GPS receiver, select them to
4800 and NONE, respectively.
www.busse-yachtshop.de | info@busse-yachtshop.de
71


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Furuno FM-4721 at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Furuno FM-4721 in the language / languages: English as an attachment in your email.

The manual is 3,95 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info