TallyGenicom LA48N Guía Del Usuario
Trouble-Shooting
7-8
Diagnostic Functions
The printer diagnostic functions are print-test and hex-dump.
Print-test tells you whether the printer hardware is functioning correctly. It prints
the print-test pattern. If the printer hardware is functional, any problems you are
having are probably caused by incorrect printer settings, incorrect software set-
tings, the interface, or the computer.
the print-test pattern. If the printer hardware is functional, any problems you are
having are probably caused by incorrect printer settings, incorrect software set-
tings, the interface, or the computer.
Hex-dump allows you to determine whether the computer is sending the correct
commands to the printer, and whether the printer is executing the commands cor-
rectly. This function is useful to programmers or others who understand how to
interpret hex dumps.
commands to the printer, and whether the printer is executing the commands cor-
rectly. This function is useful to programmers or others who understand how to
interpret hex dumps.
For details on using these functions, all of which are available in the printer Set-Up
mode, see the section “Using the Diagnostic Functions” in Chapter 5.
mode, see the section “Using the Diagnostic Functions” in Chapter 5.
Besides the above functions, the serial interface loopback test and the parallel inter-
face loopback test are provided in the printer Set-Up mode. These tests are for service
engineers.
face loopback test are provided in the printer Set-Up mode. These tests are for service
engineers.
Checking Vertical Alignment
In bidirectional printing, characters printed from left to right tend to misalign with
characters printed from right to left as shown below:
characters printed from right to left as shown below:
The vertical alignment function corrects the vertical character displacement that
sometimes occurs with bidirectional printing and results in a poor appearance espe-
cially in printing tables. This function is defined as one of the power-on initiated test
functions. If you notice misaligned printing, start this function to check and correct
the vertical print alignment.
sometimes occurs with bidirectional printing and results in a poor appearance espe-
cially in printing tables. This function is defined as one of the power-on initiated test
functions. If you notice misaligned printing, start this function to check and correct
the vertical print alignment.
Make sure that continuous forms paper or single sheet paper is loaded in the printer.
If possible, use forms at least 216 mm (8.5 inches) wide for LA48N or 356 mm (14
inches) wide for LA48W to avoid printing on the platen. Then proceed as follows:
If possible, use forms at least 216 mm (8.5 inches) wide for LA48N or 356 mm (14
inches) wide for LA48W to avoid printing on the platen. Then proceed as follows:
1.
Start the vertical alignment test.
Turn the printer on while pressing the Protocol button until the printer beeps.
The printer prints the help menu and then starts printing rows of parallel bars at
Letter quality speed.
Turn the printer on while pressing the Protocol button until the printer beeps.
The printer prints the help menu and then starts printing rows of parallel bars at
Letter quality speed.
This example shows how printing looks
when characters are vertically
misaligned. Note that the left
margin is not straight.