Epson LQ 300 - Page 82

Adjustments
LQ-300 Service Manual
4.2.2 Bidirectional Adjustment
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:
● When the main boadis rep/aced, perform the Defaults& Machine Information Settings
procedure first, then perform the Bi-D Adjustment procedure.
● Theprintercover mustbe installed whenyouperfonn the Bi-Dadjbstment.
. 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:
LQ-300 Adjustment Program
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.
8. Press 1-4, then go to adjustment program of each destination
9. When you input 1
-4, the following message appeam on the display:
LQ-300 Adjustment Program
1.
Bi-D Adjustment
2. Defaults& Machine Information Settings
3. END
If ready, press 1-3 and the
Enter key. –
10. Type 1 to select Bi-D Adjustment then press Enter.
5 rows of H characters in both draft and LQ modes.
After 10 line feeds, the printer prints
When the printer begins bidirectional
printing, the message “Bi-DTESTPIUIWING” appears on the displ~y.
-
iili’t! Ii ii It El II II I II II II El II El II El El B II II II
Dra.
LQ
——
HI
ih:il II II II K I Ii Ii Ii Ii Ii II II II B Ii II K [ II
Figure 4-2. The Bidirectional Pattern Print
4-4
Rev.A