Printer Unit Disassembly 4_2; Transformer Replacement 4_2; Print Head Disassembly 4_2 - Atari 1025 Field Service Manual

•
Remove
the
two
PCB
screws
(Figure
4-2,
#7) securing the printed circuit
board and
lift
the board straight
up.
•
Set the
PCB
on a grounding
pad.
PRINTER
UNIT DISASSEMBLY
•
Follow
the
UPPER COVER
DISASSEMBLY,
page
4-1.
•
Disconnect
the
print
head and remove
it
(see
PRINT
HEAD
DISASSEMBLY
below).
•
Remove
the
flat
cable connector screw
(Figure
4-3, #6)
and the connector
from
the carriage
frame.
•
Cut
the tie-wrap that fastens the
flat
cable
to the side plate of the
printer
unit.
•
Remove
the four bottom
cover screws
(Figure
4-2, #8)
and
their Quite-
tight
rubber caps (Figure
4-2, #9)
from
the
bottom
of the
printer.
• Follow
the
PCB DISASSEMBLY
on page
4-1. Disconnect
all
connectors
from
the board and
place
it
on a
static-free surface.
•
Grasp
the printer
unit
by
its
right
and
left side plates
and
lift
it
out
of
the
lower cover.
TRANSFORMER REPLACEMENT
• Follow
the
UPPER COVER
DISASSEMBLY,
page
4-1.
•
Follow
the
PRINTER
UNIT DISASSEMBLY
above.
•
Slide the
insulation
back
away
from
the
two
transformer terminal
connections and desolder the wires
from
the fuse holder terminal (Figure
4-2, #10) and the
flip-flop
switch
(Figure
4-2, #11).
(Do
not cut the
insulation
because you
will
need
to
slide
it
back
into place.)
•
Remove
the
PCB,
following the
PCB DISASSEMBLY
on page
4-1,
and
disconnect the transformer connector (CN1).
•
Remove
the transformer
lead
screw
(Figure
4-2,
#12) and the transformer
assembly screws
(Figure
4-2, #13).
Lift
the transformer out
and
solder
the
new
one
in
place.
Be
sure to
reconnect
the leads correctly (grey
to
fuse holder,
white
to flip-flop switch). Replace
the
insulation
over the
terminal connections.
•
Follow
the
PRINTER
UNIT
and
PCB ASSEMBLY
procedures on pages
4-9
and
4-10.
PRINT
HEAD
DISASSEMBLY
•
Follow
the
UPPER COVER
DISASSEMBLY
on page 4-1.
Atari 1025 Printer
Field Service Manual
4-2