Epson LQ-510 - Adjustment of Bidirectional Printing Alignment; Bidirectional Adjustment DIP Switch

REV.-A
DISASSEMBLY, ASSEMBLY, AND ADJUSTMENT
4.3.2 ADJUSTMENT OF BIDIRECTIONAL PRINTING ALIGNMENT
This this type of adjustment must be performed when bidirectional printing results in misaligned lines or
characters. This adjustment is also required following replacement of the SAMA board or of the printing
mechanism.
4.3.2.1 Bidirectional Adjustment DIP Switch
Bidirectional printing alignment is adjusted using the bidirectional adjustment DIP switches on the SAMA
board. DIP SWs 1-1, 1-2, 1-3, and 1-4 are for draft mode, and DIP SWs 1-5, 1-8, 1-7, and 1-8 are for LQ
mode. Tables 4-5 and 4-8 show the specifications for DIP switch settings. Note that misalignment generally
occurs when the carriage is moving from left to right.
Table 4-5. Draft Mode
Control,
Value
DIP SW
l-l 1-2 1-3 1-4
Direction and Value of Shift
-7
-6
-5
-4
-3
-2
-1
0
+1
+2
+3
+4
+5
+6
+7
ON ON ON ON
ON ON ON
OFF
ON ON OFF ON
ON ON
OFF OFF
ON OFF ON ON
ON OFF ON
OFF
ON
OFF
OFF ON
ON OFF
OFF OFF
OFF OFF
OFF ON
OFF OFF ON
OFF
OFF
OFF ON ON
OFF ON
OFF OFF
OFF ON
OFF ON
OFF ON ON
OFF
OFF ON ON ON
T/z40 inch
G/240 inch
51240 inch
41240 inch
a/240 inch
‘-/240 inch
l/240 inch
Normal position
‘I240 inch
$40 inch
al240 inch
41240 inch
s/240 inch
e/240 inch
71240 inch
c,
I
I
+---A
Printing starts n/z40 inch to
the left of the reference
position.
-7
I
4
4
Printing starts here
(reference position).
--w--q
I
*
Printing starts n/240 inch to
the right of the reference
position.
NOTE: If all DIP switches are OFF, the control values will be set to the provisional test values.
LQ-510 4-29