Samyung SDF-315, Manual

Page: 32 / 33

63
2. Troubleshooting
The table describe the symptom of trouble and their trouble-shooting. If the repair isn t
possible by general remedy, do not attempt to check inside of equipment. If the inspection
and maintenance is wrong, it can degrade the performance of equipment. So all repair works
should be left to AS technician.
A/S Technician
☏
: 1577~0198
Symtom Remedy
The power does not turn-
on

Power connector

Power supply and Fuse

Voltage of battery (under DC 12V)

Polarity of the power, + -
Screen is not turned on or
too dark

Screen brightness is 1

Display is night mode
Screen flicker or white lines
Change of screen color

Contact of LCD connector

Cleanness around LCD connector
Fish school isn
’
t display on
the screen

Poor contact of transducer connector and corrosion

Transducer is under water
Sensitivity is low

If TVG, STC set-up is too high, you can increase the gain
and then decrease TVG, STC.

If the the value of clutter and color erase are too high,
decrease them.
Several seabed

If the depth is too low or sensitivity is too high, you can
control the gain by repeat of sound wave

Low Tx Speed
Record of Fish school and
sea bottom isn
’
t stable

Because of vessel s rolling, pitching, bubbles by vessel s
screw and front vessel can induce them
No oscillation line

Set-up shift 0
64
This section describe the appendix related to the equipment operation of SDF-315

Product outline drawing
Appendix