STYLUS
800 Service
Manual
Adjustment
4.1 OVERVIEW
This section describes procedures of the adjustment required when the printer is disassembled and
assembled after repair.
4.1.1 Precautions for Adjustment
You should refer to the precautions below when adjusting the printer.
Disconnect the power cable before when you attempt the adjustment. (Unless otherwise
specified.)
4.2
BI-DIRECTIC)NAL
PRINTING ALIGNMENT ADJUSTMENT
The bidirectional printing alignment adjustment is required when the printer mechanism or the
main board is replaced. By performing this adjustment, a compensation value is determined for the
mechanical control as to compensate the deviation of print position, which may be caused by the
different print speeds due to the tolerance of the mechanical components, and the deviation of print
timing between odd-numbered lines and even-numbered lines in bidirectional printing. The
printer stores the compensation data in the EEPROM on the main board (C106 MAIN), and
referring to this data when the
bi-directional
printing is performed.
[Step 1]
[Step 2]
[Step 3]
[Step 4]
[Step 5]
[Step 6]
[Step 7]
[Step 9]
Set a stack of paper into the auto sheet feeder of
the
printer.
Comect the PC to the printer and turn the both units on.
Execute BASIC on the PC and start the adjustment program
“DNxxx.BAS”.
When the main menu of the program is appeared on
the
monitor, select
“Bi-D
Printing
Alignment” by entering “l”.
Follow the instruction displayed on the monitor, and press ENTER key to start the
adjustment.
The printer prints the check pattern with a sample compensation value.
Check the printed sample pattern, and if the character “H” is not vertically aligned in both
odd-numbered lines and even-numbered line, enter the compensation value in the range
from -30 to +30, from the keyboard.
■
Positive compensation value: Shift 2nd line to LEFT
■
Negative compensation value: Shift 2nd line to RIGHT
The printer print the sample pattern with the selected compensation value for
confirmation. If the alignment is good, press “Y’ to finish the adjustment.
[Step 10] Terminate theprogramby selecting
’’3”at
the main menu, and turn theprinteroff.
Because the compensation value specified within this program is not valid until the printer is
turned off, turn the printer off immediately after you have finish the adjustment.
Rev. A
4-1