CP42/50/52 Installation and service Chapter 10
121
10.11 Troubleshooting
For all fault finding, first check that the supply voltage is between 10 – 32 V dc.
Symptom Check Remedy
No picture on display
screen.
Check that the unit is
turned on.
Press the [PWR] key on
keypad.
Check fuse in CPXX power
cable.
Replace fuse. Use only type
F6.3A.
Picture appears on the
display screen, but image is
too dark or too bright.
Adjust the image as desired
by pressing the [PWR] key,
adjust light/contrast, and
press the [ENT] key.
No normal picture or key
operation.
Turn unit off and on again.
Check via [MENU], [1], [3]
if C-MAP chart is defective.
Remove C-MAP chart if
defective.
Disconnect power and
connect power again.
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” in the
“Edit route” display for each
stored route – see section
5.2 , and turn off “Display
track” in the “Track” display
– see section 5.6
All data is deleted after
turning the unit off and on.
Check battery lifetime,
which is 3-5 years.
Internal battery must be re-
placed by authorized dealer.
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