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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
the C199 MAIN board and refers to this data when performing bidirectional printing.
Bidirectional Adjustment is Necessary
❒ After replacing the C199 MAIN board.
❒ After replacing the printer mechanism.
❒ After disassembling the printer mechanism (for example, to replace the carriage motor).
❒ After replacing the printhead.
Adjustment Procedure
1. Connect the printer to the PC, and load paper in the printer.
2. Run adjustment program CLR200.EXE on the PC. Then, follow the 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
current value.
4. Refer to the printed alignment check pattern, and specify the compensation value.
❒ To shift the even-numbered line to LEFT: Input (–) value.
❒ To shift the odd-numbered line to 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 / EPSON Stylus 200
4-2 Rev. A