Epson Stylus 1500, Service Manual

Page: 122 / 185

Bi-D (Bidirectional Printing) Alignment Adjustment
The bidirectional adjustment is required when the printer mechanism, main board, or printhead
(board) is replaced, or when the carriage mechanism is disassembled. Performing this adjustment
sets a compensation value to correct for deviations in the print position. The deviation can be
caused by different print speeds, by tolerances in the mechanical components, or by differences in
print timing between odd- and even-numbered lines in bidirectional printing. The printer stores
the compensation data in the EEPROM on the C172 MAIN board and refers to this data when
performing bidirectional printing. Make the adjustment using the adjustment program, and set the
Adjustment mode to Pattern 2 (100 CPS), Pattern 3 (200 CPS), and Pattern 4 (400 CPS) on the control
panel. (See page 1-22.)
1. Connect a PC to the target printer via port LPT1 using a parallel interface cable, and turn the
printer on.
2. Load GW-BASIC on the PC and run the program ST1500.BAS. Then the main menu appears,
as shown below:
Customer Data
Printer Setting
[********]
3. Using Table 4-3, input the appropriate 8-digit ID number for the destination as the printer
setting for “Customer Data.” (For example, the U.S. market, or EAI: 20000A00 ). Then the
main menu appears, as shown below.
Stylus 1500
Customer Data <********> 95/**/**
<< Menu 1 >>
<<Menu 2>>
Head Data Writing --------------
----------------- --------------
Black Head Angle Adj. END
Uni-D Adj. Destination Data Writing only
Bi-D Adj. Initial Ink Charging
Color Head Angle Adj.
Black - Color HV Adj.
Head Gap Adj.
--------------
Select:<Up> or <Down> Go:<SPACE> or <ENTER> Change menu:<1> or <2>
4.
Move the cursor to "Bi-D Adj." by pressing 1, 2,
↑
, and
↓
.
5. Press SPACE and ENTER to enter the adjustment mode. The adjustment selection menu
appears, as shown below
<Bi-D Adjustment>
400 CPS ..... 1
200 CPS ..... 2
100 CPS ..... 3
Select speed
END ..... ENTER
6. Choose the number for printer speed you are using for the adjustment. If you choose 1, the
Bi-D adjustment pattern is printed out at 400 cps, as shown in the next illustration.
Adjustments
EPSON Stylus 1500 Service Manual 4-19