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1. OPERATION
3
1.2 How to Turn the Power On and Off
Press the PWR key to turn on the power.
The start-up screen appears, showing all LED dots and 7-segments. Then, the model name, and
then the results of the ROM and RAM check, OK or NG (No Good), are shown. After the self-tests
are completed, the last-used display appears.
Note: If all dots and 7-segments do not light, or if NG appears as the ROM and RAM check result,
contact your dealer.
To turn off the power, press the PWR key.
1.3 How to Adjust Display Brilliance
To adjust the display brilliance, press T, S, or DAY/NT key. The setting range is 0 to 9. "0" is off
and "9" is the brightest.
Operation with main RD-20
The main RD-20 simultaneously controls the display brilliance of the main RD-20 and the sub
RD-20s.
• Controls with T key: Decrease the display brilliance.
• Controls with S key: Increase the display brilliance.
Operation with sub RD-20
When you want to individually adjust the display brilliance for each sub RD-20, do as follows:
• Controls with T key: Decrease the display brilliance. (The variation is smaller than that of the
main RD-20 and RD-502 connected to the main RD-20.)
• Controls with S key: Increase the display brilliance. (The variation is smaller than that of the
main RD-20 and RD-502 connected to the main RD-20.)
Operation with RD-502
The RD-502 simultaneously controls the display brilliance of the main RD-20 and the sub RD-20s.
• Controls with T key: Decrease the display brilliance.
• Controls with S key: Increase the display brilliance.
Controls with the DAY/NT key: The display brilliance changes as shown in the table below with
every press of the key.
Current setting Setting after key operation Current setting Setting after key operation
00 59
15 62
26 73
37 84
48 95
Model name
ROM/RAM test
ROM
RAM
FURUNO
RD-20
OK
OK
8
.
8
.
8
.
8
.
LED test for dots
and 7-segments
11


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