Ch6 Check; Ch7 Check; Ch8 Check; Liquid Crystal Display Diagnostics - Sharp ER-A770 Manual

7) CH6 Check

Check content
The check procedure, the display, and the terminating procedure
are the same as CH1 Check.

8) CH7 Check

Check content
The check procedure, the display, and the terminating procedure
are the same as CH1 Check.

9) CH8 Check

Check content
When the channel is set, the following check is performed.
Control signal check
Ern RSn DRn
OFF OFF OFF
OFF ON OFF
ON OFF ON
ON ON ON
The read check of the above inputs.
In the read check, ER and RS are changed over in the above
sequence and the logic states of DR, CI, CD, and CS are
checked.
If the logic differs from that in the table, an error display is made.
"ON" in the table means Active LOW, and "OFF" means Active
HIGH.
The above check is repeated four cycles.
Data transfer check
The loop back data (256 bytes) of 00H ~ 0FFH are used for
data transfer check. The baud rate is set to 115200BPS.
Display
RS232 CH1 Check
ER-DR : ERROR!!
All the contents of an error must be displayed.
ERROR
ERROR display
No.
1 ER-DR:ERROR
2 ER-CI:ERROR
3 RS-CD:ERROR
4 RS-CS:ERROR
5
6
7
8 TXEMP:ERROR
9 TXEMP INT:ERROR TXEMP interruption is not made.
10 TXRDY:ERROR
11 TXRDY INT:ERROR TXRDY interruption is not made.
RCVRDY:ERROR
12
13 RCVRDY INT:ERROR RCVRDY interruption is not made.
SD-RD:ERROR
14
SD-RD:ERROR
15
16
17
Cin CDn CSn
OFF OFF OFF
OFF ON ON
ON OFF OFF
ON ON ON
ERROR content
ER-DR LOOP ERROR
ER-CI LOOP ERROR
RS-CD LOOP ERROR
RS-CS LOOP ERROR
TXEMP is not set.
TXRDY interruption is not made.
RCVRDY is not set.
(Reception enabled. TR-Q is
generated during check)
SD-RD LOOP ERROR (DATA
ERROR)
SD-RD LOOP ERROR
(DATA ERROR, FRAMING
ERROR, etc.)
Terminating procedure
Press the CANCEL key to terminate the check.

3-6. Liquid Crystal Display Diagnostics

The ER-A770 LCD display is checked.
The test program displays the patterns in the following sequence.
Every time when the ENTER key is pressed, the next pattern is
displayed. When the ENTER key is pressed at the final pattern, or
when the CANCEL key is pressed at the midst of the check, the
display returns to the menu screen.

1) Liquid Crystal Display Check

Check content
The test patterns are displayed in the following sequence. When
the ENTER key is pressed, the next pattern is displayed.
Black and white pattern at 1 dot pitch
Reversed pattern of the above
Vertical stripe pattern at 1 dot pitch
Reversed pattern of the above
Horizontal stripe pattern at 1 dot pitch