Specifications

LA 310 - Service Manual
4-7
13. Carriage motion exerciser: 2 full cycles ( one cycle is: carriage movement from one
end to the other and back )
14. Black boxes text : 3 one square-inch black boxes are printed in graphics mode. The
3 boxes are aligned horizontaly, the gap between each box is 1 inch. The graphics
resolution is 120 dpi, horizontal and vertical.
15. A continuous line printing: one dot ( wire position 4 ) printed for one line
16. Last line of the form print test: same pattern as the first line printing test.
This test is initiated when the FF and LF buttons are pressed simultaneously before the
printer is turned on and release after power-up. If paper is not loaded at power-up,
automatic loading shall apply. This test can be run with the cover open or closed.
During this test, all indicators except the Fault indicator are on permanently.
At completion of this test, 2 form feeds are performed, the indicators remain on.
The LA 310 MultiPrinter must be switched off to leave this test.
4.4.3 Serial Port Loopback Self Test
The printer is capable of executing a serial loopback test which externally loops the send
data signal back to the receive data signal, and the DSR signal back to the DTR signal
of the serial port. Detected failures cause the fault light to blink. To run this test insert
the MMJ Loopback plug and simultaneously depress the LF and Parking buttons whilst
powering on the printer. Released the buttons to initiate this test. The printer must be
powered off to terminate the test.
This test transmits the ASCII Swirl character sequence on the send data signal at the
selected baud rate and in the selected character format. If the printer does not detect
data on the receive data line within one second after the loopback test is started, then
the fault light blinks. It is the same if a signal output to the DTR is not detected on the
DSR circuit. The printer internally limits the character transmission rate to prevent
input buffer overflow during execution of the test. The printer interprets any received
data normally. Succesful execution of the test is determined by operator examination of
the printed test pattern.
During this test, the Serial indicator is On.