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5. MAINTENANCE AND CHECK
5.1 Routine Maintenance
Maintenance and check items
1
2
3
4
5.2 Troubleshooting
(1)
Appropriate screen brightness cannot be obtained or power does not turn on.
No color display appears on the screen.
(2)
Despite chart feed, no fishfinding video appears.
The display scrolls, but no fishfinding video (echoes) are displayed.
(3)
Sensitivity is too low.
The fishfinding video signal level is lower than usual.
(4)
No external dual display appears.
(5)
External data is not displayed.
WARNING
The user must not check or repair the interior of this unit in any cases.
Servicing by persons other than qualified service engineers causes fire and/or
electrical shock.
Consign internal servicing to your JRC product dealer or the JRC sales or service
representative in your area.
: Be sure to turn power off before servicing the unit
5.MAINTENANCE AND CHECK 67
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