Casio PCR-T480 - Display Tests Operation

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[ 9 ] DISPLAY TEST
[Function]
The test of LCD/7 segment display and transaction display is performed as shown below.
Command input Pattern 1 Pattern 2 END
Press Any key Press Any key
RPT
AMOUNT
T1 T2 T3 T4 TOTAL CHANGE RPT
AMOUNT
T1 T2 T3 T4 TOTAL CHANGE
Pattern 1 Pattern 2
ABCDEFGHIJKLMOP
QRSTUVWXYZabcdef
[Operation]
Operation : n 2 1 SUB TOTAL
n: 0 = One time check (can be omitted)
not 0 = Continuous check (To stop the test, press “C” key)
[Print]
D I S P 2 1
D I S P O K
N D 2 1