Epson LQ 1050 - B/W Dot-matrix Printer - Page 106

REV.-A
Half-dot Protection Circuit
The half-dot protection circuit is located in the gate array
(E05AI 5HA). It
received after the dot wires of the
printhead (see Figure 2-3) have been
allowable drive time, to prevent the
printhead from being damaged.
&
ignores any drive pulses
driven for the maximum
------------------------------------------------------
t
#
I
I
I
I
I
I
I
I
1
I
I
I
I
From :
N
m;
v
I
I
I
1
1
I
I
Buffer
I
+-
I
I
~J
I
1
I
I
I
L ------------
r
I
I
1
I
1
8
I
I
I
I
I
I
Holf dot
9uffer
I
I
Protect Ion
To Prlntheod
Circuit
It
Driver
I
1
I
A
I
t
I
1
1
~Dd
i
I
I
I
I
I
GA(E05A15HA)
1
, ----------------------------------------J
i-
Figure 2-52. Halfdot Protection Circuit Block Diagram
2-62