Furuno FCV-1200L, Руководство по обслуживанию

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9. CONNECTTING EXT. VGA MONITOR
More about external monitor
1) The external monitor is a VGA monitor or equivalent.
2) The line impedance of R, G, and B must be 75 ohms.
3) Horizontal synchronous signal is 31.469 kHz, negative polarity.
4) Vertical synchronous signal is 59.94 Hz, negative polarity.
5) The cable between the VGA monitor and the IF-8000 is not specified by the IF-8000, but it must
accord to the VGA monitor if specified. Long cable may cause the problem such as color
distortion and moving picture.
When monitor color is not correct,
1) Make sure that all bits of S1 on the MIF board in the IF-8000 must be turned on when only
VGA monitor is connected to the IF-8000.
2) Make sure that all bits of S1 on the MIF board in the IF-8000 must be turned off when VGA
monitor and the standard monitor MU-101C are connected to the IF-8000.
3) If switch setting does not cure the problem,
(a) Make sure that the cable between the IF-8000 and the VGA monitor is not too long, using a
shorter cable.
(b) Adjust R9, R10, and R11 on the MIF board for signal level of 0.7 Vpp, observing TP4, TP5,
and TP6 with a oscilloscope respectively. The input impedance to the monitor may not
match to 75 ohms.
When picture is not steady,
1) Change jumper settings JP6/JP7 on the MIF board to “Buffer.”
2) Adjust the frequency of synchronous signals manually on the VGA monitor.
3) Shorten the cable between the IF-8000 and the VGA monitor, if it is too long. The cable length
depends on the VGA monitor to be used. The cable between the processor unit and the IF-8000
is 15 m or less.