8. MAINTENANCE
8-7
Picture distorted
Equipment generating strong magnetic field is near display
unit.
Locate magnetic field generating equipment (rectifier, etc.)
well away from the display unit.
Picture contains noise
Equipment not grounded properly. Carefully check the
ground.
Power cable is run alongside the signal cable. Signal cable
may pickup noise emitted from power cable of other equip-
ment; therefore, separate them from each other.
Debris may be on sea surface. Reject unwanted echoes
with the interference rejector on the SONAR menu, TVG
control or NL control.
Trail speed is low
Confirm if the “IR“ is ON in the SONAR menu.
If the “IR“ function is ON, trail is lower than usual cause the
reflection signal is compared with latest. Use the function
’off’ in usual.
Symptom
Check
Summary of Contents for CH-37BB
Page 1: ...COLOR SECTOR SCANNING SONAR CH 37BB OPERATOR S MANUAL www furuno com Model ...
Page 10: ...SYSTEM CONFIGURATION viii This page is intentionally left blank ...
Page 40: ...3 VERTICAL FAN MODE 3 12 This page is intentionally left blank ...
Page 44: ...4 3D MODE 4 4 This page is intentionally left blank ...
Page 48: ...5 PRESENTATION MODE 5 4 This page is intentionally left blank ...
Page 52: ...6 CUSTOM MODE KEYS 6 4 This page is intentionally left blank ...
Page 58: ...7 SYSTEM MENU 7 6 This page is intentionally left blank ...
Page 66: ...8 MAINTENANCE 8 8 This page is intentionally left blank ...