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2. MAINTENANCE, TROUBLESHOOTING
14
Test results
Model name: The model name "RD-20" is displayed.
LED test (pattern 1 and 2): Check that all LED segments light.
ROM, RAM: The results of the ROM/RAM test are displayed as OK or NG (No Good). If any NG
is displayed, contact your dealer for instruction.
Program version (starter, booter, main, RD-501, RD-502): The program version numbers are
displayed.
Serial loopback test (CH1 and CH2), for field serviceman: A test jumper is required for this test.
The result of the loopback test is displayed as OK or no indication (test not done).
Key test
1. While you hold down the UNIT key, press the PWR key to turn on the power.
2. Press T key once to display the key test screen.
Note: You can not use the T key of the RD-502 at this screen.
Start screen for
automatic test
Model name
ROM/RAM test
Starter program
version
SELECT
AUTO
ROM
RAM
xx.xx
STARTER
FURUNO
RD-20
2651003-
Booter program
version
BOOTER
Main program
version
MAIN
While holding down the UNIT key,
press the PWR key to turn on the power.
OK
OK
2651004-
2651005-
RD-502
2651009-
RD-501
2651009-
LOOPBACK
CH2
LOOPBACK
CH1
8
.
8
.
8
.
8
.
8
.
8
.
8
.
8
.
LED test
pattern 1
LED test
pattern 2
RD-501 program
version**
RD-502 program
version**
Serial loopback
test for CH1*
Serial loopback
test for CH2*
*: When loopback test
is OK, “OK” appears.
When loopback test is
NG, there is no indication.
xx.xx
xx.xx
xx.xx
xx.xx
xx: Program version number
MODE key (Automatic test starts.)
**: When connecting
RD-501 or RD-502,
program number and
version number are
displayed.
22


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