SeeGull
®
MX Hardware Reference Manual
PCTEL, Inc.
Page 16
Rev. K
7. Troubleshooting
This section includes suggested procedures
for addressing potential user-serviceable
problems with SeeGull MX operation.
7.1.
No Power: Receiver LED not
Illuminated
When the scanning receiver is turned on and
receiving power, the Status Indicator LED
located on the face of the scanner lights up. If
the scanner is not receiving power, follow
these steps:
1. Check the connection to the power
source.
2. If the connection is secure, check the
fuse, which is located in the cigarette lighter
end of the power cord. Remove the cigarette
lighter plug end from the power source. Refer
to
for an illustration of the power
plug.
Note:
Check The Fuse in the Cigarette
Lighter Plug Before Sending the Scanner
for Service
The fuse can be “blown” by a surge in the
portable or mobile battery system. A
temporarily shorted wire can also cause other
problems.
The fuse is the first line of defense should any
short circuit, large spike, or other problems
occur within the power wiring circuitry. If the
fuse is not operating normally, it will open up,
thereby disconnecting the input power from
the SeeGull MX Scanning Receiver. When
the fuse “blows”, there will be no power to the
receiver.
3. Loosen the fuse-holding finger nut by
turning it counter-clockwise until the plug
comes apart. The fuse is inside the power
plug housing and can be removed.
Figure 14. SeeGull MX Scanning Receiver Power
4. Replace the fuse with an identical 12-
amp fast blow fuse.
Note:
Only use a 12-amp fast blow fuse;
any other fuse value may cause severe
problems with the unit and void the
warranty. In order not to violate the safety
approval of the receiver, the fuse must be
safety approved.
5. Insert the new fuse in the housing and
re-assemble the plug by turning the
knurled finger nut in a clockwise direction.
Tighten this nut as tight as you can with
your fingers.
Note:
Do Not Use Tools to Tighten
7.2.
Received Signal Strength
Appears Low
A received signal strength that appears to
be lower than expected is likely caused by
one of the following problems:
1. an incorrect antenna is being used
2. an antenna is not properly
connected
3. the antenna or antenna cable is
damaged.
Check that the antenna is properly
connected to the scanner, and that the
antenna is of the correct frequency.
Pressure Clips
Positive Connection
Fuse Holding Nut
(Turn Counter-Clockwise to Open)
