Change And Adjustment Of Antenna Speed - Furuno FAR-2107 Series Service Manual

4.13.2 Change and adjustment of antenna speed

The PWR board of 42 rpm type is 03Pxxxxx-B and D types, and the PWR board of 24 rpm
type is 03Pxxxxx-A and C types.
When the Power SPEC is different from the Antenna motor SPEC, the desired antenna
speed cannot be achieved. For instance, if RSB-096 of 24 rpm type is used with the PWR
board of B and D types, the antenna motor power voltage becomes more than 30 V, which
can result in a damage of the antenna motor.
Change of SPEC
1. Make the setting of jumpers JP161 and 162
PWR board
03PxxxxA, C
03PxxxxB, D
2. Make adjustments of the B.P frequency according to the antenna speed. Connect the
frequency counter to TP17 and make adjustments at R168.
PWR board
03PxxxxA, C
03PxxxxB, D
To make adjustments of 03PxxxxB and D (42/36 rpm)
Set [MENU] -> 0 -> 3 -> 4: ANT REVOLUTION] to "AUTO".
The antenna speed automatically changes according to the transmission pulse length.
Adjust the pulse length to 252 Hz at S2. See page. 4-17.
- S1, S2 -> 252 Hz: 42 rpm (Motor voltage, Approximately 24 VDC)
- M/L -> 204 to 288 Hz: 34 to 38 rpm (Motor voltage, Approximately 20 VDC)
ANT speed
(rpm)
24
42/36
ANT speed
Adjusting
(rpm)
position
24
R168
42/36
RSB-097
42/36rpm
ANT Motor power
(24V/20V)
BP
BP
SPU
ANT Speed
p.b.c
(Hi/Low)
Fig. 4.13.2 Adjustment of Antenna Speed
4.13 Change of Antenna Speed: RSB-096 and RSB-097
PWR board setting
JP161 JP162
Open Open
Short Short
Adjustment
Check point
TP17 (B.P)
RPU-013
TP17
The antenna speed can be changed
by "ANT Speed" signals.
PWR p.c.b
(B/D type)
4-68
Gearbox
RSB-096
RSB-097
Adjusting value
144 + 5 Hz
252 + 5 Hz (42 rpm)