Furuno 841 MARK-2 manual Installation Check List, Radar

	J55 (NMEA)
SPU9180
TLL, RSD	J61
MODEL 841 M2

Navaid

Echosounder

Video plotter

7.	Connect the NMEA cable to the connector
	assy (03-1796/5P, supplied with radar) as
	shown the figure on next page.
8.	Connect the 5P connector to J51 on SPU
	Board.
9.	Replace the covers removed in step 1.
10. Connect navaid and other equipment to
	radar.

The position data from navaid can be used for the echosounder if a video plotter is not connected.

11. Turn on the radar and confirm that NAV

data in properly received at the radar and ex-

ternal equipment.

Procedure

1.Unfasten the nuts fixing the waterproof con- nector to remove the covers of the power and display unit.

2.Remove all connectors from SPU Board (SPU-9180).

3.Unfasten three screws to remove the board.

4.Remove JP3, R91 and R92 on the parts side of SPU Board.

5.3 Installation Check List

After completing the installation it is a good idea to check for proper installation. Follow the checklist below and tick boxes to show proper completion.

❒ Is the vent tube on the antenna housing on

the stern side?

❒ Are the four bolts for fixing the radome tight-

ened?

❒ Is the signal cable waterproofed at the ra-

dome base?

R93

R94

SPU-9180

Parts side

Remove JP3.

JP3 JP4

CR14

R90

R91

❒ Is the signal cable secured against a mast or

bulkhead?

❒ Is the cable gland or cable entry on the

deck fully waterproofed?

❒ Are the connections to the battery of

correct polarity?

❒ Are all the antenna and display units

R95	Q15
		R91
Q16		R92	Remove R91 and R92.

5.Add jumper wire between J55 pin #3(RXD-

H)and J61 pin #1(TXD-H).

6.Add a jumper wire between J55 pin #4(RXD-

C)and J61 pin #5(SHIELD).

Add the jumper wire between J61#5 and J55#4.

	JP3		JP4
	CR14
R93	R90		J55
	R91	J61
R94					R69
	5
	Q15				C27
R95			4	3	R70
	R91
Q16	R92
	1

Add the jumper wire between J61#1 and J55#3.

grounded?

❒ Are all connectors at the rear of the display

unit fastened securely?

CAUTION

If it is necessary to open the display unit, be sure the rear cover is fitted to the front chassis properly when closing the rear cover. When reassembling, first turn off the unit and then press the center of the rear cover to plug in the multipin connector on the rear cover.

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