Simrad CR44 Manual

CR44/54 Troubleshooting, Service and Specifications Chapter 10-1
10.1 Troubleshooting
For all fault finding, first check that the supply voltage is between 10-32 VDC
Symptom Check Remedy
No picture on display
screen
Check that the unit is
turned on
Press the [PWR] key on
keypad
Check fuse in power cable
fuse holder
Replace fuse. Use only
type F6.3A
Picture appears on the
display screen, but image
is too dark or too bright
Press [PWR], adjust light
and press [ENT]
No normal picture or key
operation
Turn unit off and on again
Disconnect power and
connect power again
Check via [MENU], [7],
[CHART] if C-MAP chart
is defective
Remove C-MAP chart if
defective
Return to factory presets,
see section 9.7
No GPS position update Check external position to
be OFF, refer to interface
display in [MENU],[7],[2]
Check antenna and cable Replace antenna or cable
Screen update is
extremely slow
Check that the stored
Tracks and Routes (not
currently in use) are not
all drawn up on the chart
Turn off ‘Course line’
for each stored route in
sec.8.2, and turn off ‘Dis-
play track’ in sec.8.6
Echo image on radar display
differs from actual image
Check if ship’s heading is
incorrect
Set ship’s heading cor-
rectly - see section 3.2.2
Check if timing is incor-
rect
Set Zero Range correctly
- see section 3.2.2
Echo images on radar
display are blurred
Check if GAIN, STC
or FTC is not adjusted
properly
Make adjustments - see
section 3.2.5
Too much noise in radar
display
Check if tuning is incor-
rect
Adjust TUNE - see sec-
tion 3.2.2
Alarm activated in radar
function
Check Alarms in section
3.2.9

Simrad CR44 Specifications

General

Brand	Simrad
Model	CR44
Category	Marine GPS System
Language	English