Casio QT-2000 Service Manual page 58

(12) RAM Read/Write test
Performs read after write test on RAM addresses 20000H to 3FFFF.
Operation: [n][1][4][SUB TOTAL]
n = Number of execution and should be within the range of 0 to 9.
If no number or "0" is input, the test continues endlessly.
To stop the test, press [ESC].
Display: <LCD>
R/J print:
RAM
RAM#2
RAM#2
RAM#2
END
(13) RAM Read test (memory backup test)
The program checks if RAM contents stored at the "RAM read/write test" are backed up after turning the power off.
Operation: (1) After the above "RAM Read/Write test", turn the power off.
(2) After for a while, turn the power on then press [n][1][5][SUB TOTAL].
n = Number of execution and should be within the range of 0 to 9.
If no number or "0" is input, the test continues endlessly.
To stop the test, press [ESC].
Display: <LCD>
R/J print:
RAM
RAM#2
RAM#2
RAM#2
END
RAM 14
RAM#2 OK
Number of execution.
RAM#2 OK
Indicates "NG" when the
RAM is faulty.
RAM#2 OK
END 14
14
OK
"NG" when the RAM is
faulty
OK
OK
14
RAM 15
RAM#2 OK
Number of execution.
RAM#2 OK
Indicates "NG" when the
RAM is faulty.
RAM#2 OK
END 15
15
OK "NG" when the RAM is
faulty
OK
OK
15
<Dot/7-segment>
Dot/7-segment display indicates 0 only when
the test is continued from the "Dot/7-segment
display test." When the test is performed
0
indipendently, the dot/7-segment display indi-
cates nothing.
<Dot/7-segment>
Dot/7-segment display indicates 0 only when
the test is continued from the "Dot/7-segment
display test." When the test is performed
0
indipendently, the dot/7-segment display indi-
cates nothing.
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