Epson DLQ-3000 Service Manual page 94

4.4.2 Bi-directional Adjustment
This section describes the bidirectional adjustment procedure necessary when the DLQ-3000
printer is reassembled or when parts are reinstalled or replaced. This procedure is also needed if
the BOARD ASSY.,C124 MAIN has been replaced.
Notes:
. When the main board is replaced, petform the defat.dts and machine information setting
procedure first, and then perform the Bi-D a@stmentprocedure.
Do notpetiorm the Bi-D adjustment it there is heavy fluctuation of the input voltage.
The procedure is as follows:
Connect the printer to a PC.
Step 1 :
Step 2: Turn the printer on.
Load paper into the printer by pressing the LOAD button.
Step 3:
Step 4: Load the GWBASIC program onto PC.
Insert a diskette containing the DLQ-3000 Adjustment Program.
Step 5:
Load the DLQ-3000 Adjustment Program" MIxxx.BAS". ( xxx for each destimtion).
Step 6:
Step 7: When you run the check program, the following message appears on the display:
Type to select Bi-D Adjustment and press the Enter key. After several line feeds, the
Step 8: 1
printer starts to print 5 rows of 1 characters in both draft and LQ modes. When the
printer begins Bi-D printing, the message "Bi-D TEST PRINTING" appears on the
display.
After printing is completed, the following message appears on the display:
Step 9:
Among the 5 rows of draft patterns, find the row in which the vertical lines of I are best
aligned. Then enter the value assigned to that specific row. The following figure is an
example of the Bi-D printout.
After you enter the value for draft, the following message appears on the display:
Step 10:
Among 5 rows of LQ patterns, find the row in which the vertical lines of 1 are best
aligned. Then enter the value assigned to that specific row.
Rev. A
1. Bi-D Adjustment
2. Default& Machine Information Setting
3. END
If ready, press 1-3 and the ENTER key. –
Draft: -
LQ : -
1 1 1 1 1 1 1 1 1 1 1 1 I l l
, , I
, / , , ! ~ I
1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1
!
1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 !
i ' '
I I I I
1 1 1 1 1 1
1 1
1 1 1 1 1 1 1 1 1 1 1 1
I l l
1 1 1 1 1 1 1 1 1 1 1 1
I l l
I l l
1 1 1 1 1 1 1
Pattern
Figure 4-6. Bi-D
I
1 1 1 1 { 1 1 1
1 1 1 1 1 1 1 1
I l l 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
1 1 1 1
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
1 1 1 1
{ 1 1 1
1 1 1 1 1 1 1 1
I l l
I l l 1 1 1 1 1 1 1 1
I i i
Printing
Adjustment
4-7