4.1.1 Bi-D (Bidirectional Printing) Alignment Adjustment

The bidirectional alignment adjustment is required when the printer mechanism, main board, or printhead (or
printhead board) is replaced. Performing this adjustment determines the compensation value needed to rectify
any deviation in the print position. This deviation could be caused by the different print speeds, which are due
to tolerances in the mechanical components, or to differences in print timing between odd-numbered lines and
even-numbered lines in bidirectional printing. The printer stores the compensation data in the EEPROM on
theC199 MAIN board and refers to this datawhen performing bidirectional printing.

Bidirectional Adjustment is Necessary

After replacing theC199 MAIN board.
After replacing theprinter mechanism.
After disassembling theprinte r mechanism(for example, to replace the carriage motor).
After replacing theprinthead.

Adjustment Procedure

1. Connect the printerto the PC, and loadpape r inthe printer.
2. Run adjustment programCLR200.EXE on the PC. Then, followthe program instructions, and select the
Bi-D alignment operation.
3. Choose the type of head currently installed in the printer. The printer prints a Bi-D pattern with the
currentval ue.
4. Referto the printed alignment check pattern, and specify thecompensation value.
To shift theeven-num beredline to LEFT: Input (–) value.
To shift theodd-numbe red lineto RIGHT: Input (+) value.
Bi-D Mode : BLACK Head / Print-speed : 167 cps (Draft) / VALUE :
Shift to RIGHT: (+) Value
Shift to LEFT: (-) Value
Figure 4-1. Bi-D Alignment

Adjustments EPSON Stylus COLOR 200 /EPS ON Stylus200

4-2 Rev. A