JRC NCR-333 Instruction Manual page 86

I
a. The Diagnosis of equipment (SELF DIAGNOSIS)
Procudure
1) Select 1.SELF DIAGNOSIS , and press the lEN] key. Cursor moves to the right side of R:".
2) Press the
~ ~
key and select the following items;
START: Self diagnosis is started. However, the diagnostic results are not printed.
ST-PRTN: Self diagnosis is started. After self diagnosis is completed, the diagnosis results are
printed.
CANCEL: Self diagnosis is not started. Cursor returns to 1.SELF DIAGNOSIS
3) Select the "START• or "ST-PRTN", and then press the IENlj key.
Self diagnosis starts by the
~ROM"
test and is ended by the "4209.5 kHz over all test".
During diagnosis, "SELF DIAGNOSIS" of screen title repeats blink.
The buzzer sounds at the last of diagnosis, and check that the buzzer sounds normally. Press
IQill
key to
stop the beeping.
l.SELF DIAGNOSIS
ROM
RAM
SIO
PS
ANTENNA CHECK
518kHZ OVER ALL
490kHZ OVER ALL
4209.5kHZ OVER ALL
•
: 0
TEST:
TEST:
TEST:
GOOD
GOOD
GOOD
GOOD
"OVER ALL TEST" takes about 15 seconds per test.
Whenever one test (OVER ALL TEST) is completed, character string as shown in the following figure is
displayed. When "*M is displayed in a character string, the test result is NG.
l.SELF DIAGNOSIS
ROM
~
OVER ALL TEST:
RAM
SIO
PS
ANTENNA CHECK
518kHZ OVER ALL TEST:
GOOD
GOOD
GOOD
GOOD
GOOD
·ovER ALL TESTR is the test which outputs
a test signal from the inside of the circuit,
and receives the signal from each receiver.
490kHZ OVER ALL TEST:
4209.5kHZ OVER ALL TEST:
Test signal (Character strings):
THE QUICK BLOWN FOX JUMPS OVER
THE LAZY DOG. 123456789.
,?()=/+-:
THE QUICK BLOWN FOX JUMPS OVER
THE LAZY DOG. 123456789.,?()=/+-:
I[
Caution
]I
When the result of the malfunction is displayed, contact our service center or an agency as soon as
possible after referring to troubleshooting of Chapter 7.
Th I' t fd' . "t
e
IS 0
1agnos1s
1
ems
Diagnosis items Explanation Corrective Action
ROM
The data memory and the program memory are checked.
Replace CMJ-501 NA.
When the program memory is abnonnal (NG},
'[1]'
is displayed,
and when the data memory is abnonnal,
'121'
is displayed.
RAM
The memory for temporarily storage is checked.
SIO
Serial interfaces are checked.
When the 'ECDIS/GPS' port
is
abnonnal (NG),
'[1]'
is displayed,
and when the 'Maintenance/Printer' port is abnormal,
'[2]'
is
displayed, and when the 'DISP' port is abnormal,
'[3]'
is
displayed.
PS
The power supply part
is
checked.
ANTENNA CHECK
The DC voltage
of
the
NAVTEX
antenna is checked.
Replace CMN-2333A.
518KHZ OVERALL TEST
Internal receiver
(RX1}
is checked.
490KHZ OVER ALL TEST
Internal receiver
(RX2)
is checked.
4209.5KHZ OVER ALL TEST
Internal receiver (RX3} is checked.
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