Sharp ER-A520 Service Manual page 18

7) CLOCK TEST
1 Key operation
107 3
CA/AT
2 Test procedure
OP display
T I M E R
1 0 7
3 Check that:
"–" blinks and the clock counts up.
4 End of testing
When any key is pressed, the date and time are printed and the
test mode will be terminated.
X X X X X X
year hour
month
day
8) DRAWER 1 OPEN & SENSOR TEST
1 Key operation
110 3
CA/AT
2 Test procedure
OP display
D R A W E R
X : O = DRAWER OPENED
C = DRAWER CLOSED
3 Check that:
A) The drawer 1 opens normally.
B) The sensor correctly indicates the status of the drawer 1.
4 End of testing
You can exit the test mode by pressing any key. The printer prints
the following.
1 1 0
S R V
C H E C K
Hour Min. Sec.
Blinks at an interval of 0.5 sec.
X X X X X X 107
min.
sec.
1
S R V
ER-A520U/ER-A530U DIAGNOSTIC PROGRAM
9) DRAWER 2 OPEN & SENSOR TEST
1 Key operation
111 3
CA/AT
2 Test procedure
OP display
3 Check that:
A) The drawer 2 opens normally.
B) The sensor correctly indicates the status of the drawer 2.
4 End of testing
You can exit the test mode by pressing any key. The printer prints
the following.
10) LCD CG TEST
1 Key operation
116 3
CA/AT
2 Test procedure
To check the display CG, 256 pieces of built-in CG's are grouped
into 16 blocks and each 16 characters is displayed on the dot dis-
play.
At first, CG code of 00H ~ 0FH is displayed. By pressing any key,
each block is displayed in sequence.
OP display
X Y
X
"XY" indicates the code at the head of each block
in hexadecimal number.
(Example: 10, A0)
3 Check that:
A) Displays are clear.
B) Free from blur, chip-off, unevenness.
4 End of testing
You can exit the test mode by pressing any key. The printer prints
the following.
– 17 –
2
D R A W E R
X : O = DRAWER OPENED
C = DRAWER CLOSED
1 1 1
"O" indicates the CG display position.
1 1 6
S R V
X
S R V