Self-Test 4 - Epson MX-80 Operation Manual

(2) When the Printer falls into paper-out status, it is automatically put in the
OFF-LINE state and paper advancement can be performed by depressing the
LF switch.
After setting new paper in the Printer, depress the ON LINE switch so that the
Printer may resume operation.
(3) There is another way to start the Printer again when it falls into paper-out
status. Set new paper in the Printer, and turn the POWER switch off and on
again, or apply the INIT signal. In this case, however, all previously established
data such as TAB, line spacing, etc. are cancelled.
(4) The paper end detecting function is useful to prevent erroneous printing when
the Printer is out of paper. If printing of characters up to the last line is to be
continued, the paper end detecting function may be made invalid by either of
the following two methods.
(a) Set the DIP switch pin l-6 to the ON position, and the paper end detect-
ing function will become invalid hardwarewise.
(b) Enter control code "ESC 8" and the paper end detecting function will
become invalid softwarewise.
4. Self -Test
The MX-80 Type I I has a self-test (self-diagnostic) function to check the following.
(1) Print head operation and printing quality
(2) Operation of the printer mechanisms (motor, cartridge ribbon mechanism,
belt, etc.)
The self-test function is pre-programmed and can be performed by turning the
POWER switch on while depressing the LF switch. All characters provided by the
internal software are printed out on the paper by this operation.
NOTES: 1. The self-test function cannot be performed when the printer is out of paper.
2. To check all interface logic including the interface connector, proceed as follows:
a) Connect ACKNLG signal pin No. 10 to STROBE signal pin No. 1 with a lead
wire.
b) Turn the DIP switch 2-3 (on the control circuit board) ON to effect auto-line
feed.
c) Set the adequate ASCII code data to be printed. To obtain low logic level
signals, connect the data transfer line required for printing (pin Nos. 2 to 9)
to GND level (pin No. 33, etc.)
* Example of printing "Z"
" Z " = [ 5 , A ]
In this case, connect pin Nos. 2, 4, 7 and 9 to pin N
( 0 1 0 1 1 0 1 0 )
H
- 4 0 -
. 33.
O