Epson LQ-300 Service Manual page 82

Adjustments
Bidirectional Adjustment
4.2.2
This
section describes the adjustment procedure necessary when the LQ-300 printer is reassembled
or when parts are reinstalled or replaced. This procedure is also necessary if the main board
assembly has been replaced.
Notes:
procedure first, then perform the Bi-D Adjustment procedure.
. Do notperfonn the Bi-D Adjustment procedure if the input voltage is fluctuating heavily.
. The optional color upgrade kitmustbe removed when youpefform the Bi-Da~"ustment.
1. Connect the printer to a PC.
2. Turn the printer on.
3. Load paper into the pninterbypressing the LF/FF button.
4. Load the GWBASIC program onto the PC.
5. Insert a diskette containing the LQ-300Adjustment Program into the PC's diskette drive.
6. Load the LQ-300 Adjustment Program''BKMENU.BAS".
7. When you run the program, the following message appeam on the display:
1. EAI, EAI(Latin A), EIS, EIB, EUL, ESP, EHK
2. EDG, EFS
3. EDG (NLSP)
4. El-r
5. END
Do nut input unspecified destination!
Please input each destination No.( 1-4 ) and Enter Key.
Press 1-4, then go to adjustment program of each destination
8.
When you input 1 -4, the following message appeam on the display:
9.
1. Bi-D Adjustment
2. Defaults& Machine Information Settings
3. END
If ready, press 1-3 and the
10. Type 1 to select Bi-D Adjustment then press Enter.
5 rows of H characters in both draft and LQ modes.
printing, the message "Bi-DTESTPIUIWING" appears on the displ~y.
LQ
Figure 4-2. The Bidirectional Pattern Print
4-4
Enter key. –
After 10 line feeds, the printer prints
When the printer begins bidirectional
-