Furuno CN-24, Service Manual

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7-2
4) Connect LED indicator to J13 on the TRS.A board as follows.
Figure 7.1 LED indicator circuit
5) Connect receiving transducer or test cable to the display unit and the TX transducer,
see pages 5-2/5-3, in order to obtain the depth data on the display.
6) Connect the oil pressure device to pressure sensor of the transceiver unit.
!
Adjustment
Turn on the transmitter unit by rotating the screw of the pressure switch (test switch) to
clockwise(1.5 turn).
1. Offset and full scale adjustment
1) Set DIP switches S1 and S2 on the CONT B board as follows
S1 #1 #2 #3 #4 #5 #6 #7 #8
off off off off X X X off
S2 #1 #2 #3 #4
off off off ON
DIP switch settings of "X" is as follows
TX frequency #5 #6 #7
50 KHz on off on
40 KHz on on off
33 KHz on off off
2) Release pressuring (0 kgf/ cm
2
)
3) Adjust the R10 on sensor board so that the depth indication on the display unit shows
0m.
4) Set the oil device to 206 kgf/cm
2
5) Adjust the R11 so that the depth indication on display unit shows 500m.
1
5
J13
TRS. A
01P5742
2.7 k
LED