Furuno TS-331A - Manual (Page 57)

6. MAINTENANCE & TROUBLESHOOTING
49
3. Unscrew the connector and then connect the test cable as shown below.
BLK WHT (CABLE-)
CASE < A <
CABLE+ < B <
CABLE- < C <
SHIELD
RED
BLACK
BELDEN 8424 or 8404
TEST CABLE
RED BLK (CABLE+)
> 1
> 2
Underwater splice
To Surface
Processor Unit
Pigtail Connections
(see pin description below)
1 2
SOCKET VIEW
Unscrew connector
and then connect
test cable.
How to connect the test cable to the underwater unit
4. Turn on the Surface Processor Unit and monitor.
5. If the vertical scanning and echo sounder images update properly and depth
and temperature readouts show 0 m and ambient temperature respectively,
the underwater unit is functioning normally.
Note: If echo test is required, immerse the underwater unit in water (fresh or
salt water) and check for echoes.
6. Turn off the Surface Processor Unit and monitor.
7. Disconnect the test cable and then fasten the connector.
8. Spray the connector with silicone spray.
9. Close the cover. Do not overtighten screws; the case will crack if screws are
overtightened.