CVR–010
User–Level Trouble Shooting
(continued on next page)
71
11. User–Level Trouble Shooting
11.1. Introduction
・
A list of common troubles the user may experience while operating the equipment is
given below along with recommended remedies for such troubles.
・
If a problem persists, contact your dealer for assistance, giving as much information as
possible about the symptom, operating frequency, control and menu settings used,
serial number of, and firmware version
*
1
installed in the equipment.
*
1
:
The firmware version number can be displayed by switching the equipment off first and then switching it on again
while holding down
.
< WARNING >
DANGEROUS HIGH RF VOLTAGE PULSES ARE PRESENT ON THE TRANSDUCER
CONNECTOR PINS WHEN THE EQUIPMENT IS SWITCHED ON. THE USER MUST NOT
TOUCH, OR CONNECT ANY TEST TOOL TO, THOSE CONNECTOR PINS.
11.2. Depth
Readout
Symptom
Suggested Solution
No depth readout
No bottom echo or very weak bottom
shows, triggering the bottom–missing
alarm at all times.
1. Check if transducer is properly plugged into
rear panel
TRANSDUCER
connector.
2. Activate automatic control
(
AUTO
)
mode by
pressing
, if unit is in manual control
mode now.
3. If
AUTO
mode still does not correct
problem, check current
AUTO TVG
response characteristics via procedure
given in paragraph 9.7, and select
appropriate option that matches your
transducer.
Intermittent depth readout
Digital readout is intermittent regardless of
the bottom display in one of the strongest
colors.
・
Bottom echo is often lost when ship is:
- heavily pitching or rolling;
- traveling in the wake of another vessel;
- going astern; or
- traveling over steeply changing bottom
over short distances.
・
Select shorter readout response time, e.g.
MEDIUM
or
FAST
(ref. paragraph 8.13)
.
Impossible to measure depth
shallower than 5 meters
The zero line ( thick line below the top
scale line ) is too thick, blocking reception
of the bottom echo from shallow depths
immediately below the transducer.
1. Activate automatic control
(
AUTO
)
mode by
pressing
, if unit is currently operating in
manual control
(
MANUAL
)
mode.
2.
If
AUTO
mode still does not correct
problem, check current
AUTO TVG
response characteristics via the instructions
given in paragraph 9.8, and select
appropriate option that matches your
transducer.
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