Disassembly/Adjustment/Assembly Procedures; Upper Cover Disassembly 4_1; Pcb Disassembly 4_1 - Atari 1025 Field Service Manual

SECTION
FOUR
DISASSEMBLY/ADJUSTMENT/ ASSEMBLY
PROCEDURES
***
NOTE***
1.
The
exploded mechanical
drawings, Figures 4-1
through
4-6,
referenced
in this
section are located on pages
4-11 through
4-19, respectively.
2.
The
numerical
callouts
on
the exploded mechanical drawings
in this section
serve
as
locators
for
the
DISASSEMBLY /ADJUSTMENT/ASSEMBL
Y
instructions, as well as for the
MECHANICAL
PARTS
LIST
in
Section Seven.
The
alphabetical
locators,
however,
only serve as
referents
for
the
MECHANICAL PARTS
LIST
in
Section Seven.
3.
Protect the
plastic surfaces of the console
by working on a
soft
surface (a
grounding
pad works very
well)
when
the console
is
turned
over,
bottom
up.
4.
Use
ALL
static control precautions
when
handling any
printed
circuit board.
UPPER COVER
DISASSEMBLY
•
Remove
the platen knob
(Figure
4-1, #1).
•
Remove
the top cover
(Figure
4-2,
#2) by
pulling
it
straight up.
•
Loosen
the
two
switch assembly screws
(Figure
4-2, #3)
and
slide
the switch
back
out
of
the
way
of the cover.
•
Remove
the
two
upper cover screws
(Figures
4-2,
#4)
from
the
inside
of the
front of the upper
cover.
•
Tip the upper cover back
to
disengage
it
from
the hooks on
the lower cover
and
lift
it
off.
PCB DISASSEMBLY
• Follow
the
UPPER COVER
DISASSEMBLY
above.
•
Disconnect
the I/O cables (CN6,7) and the
Paper-Near-End connector (CN2) on
the
back
panel of the lower cover.
• Unplug
the
print
head assembly
(Figure
4-1, #5)
from
the connector by
reaching
in
and
carefully
working
it
loose.
•
Remove
the
flat
cable connector
screw
(Figure
4-3,
//6)
and
the connector
from
the carriage
frame.
Unwrap
the
flat
cable from
around the
printer
unit.
•
Cut
the tie-wrap which
fastens the
flat cable
to
the
right side of
the printer
unit.
Atari 1025 Printer
Field Service Manual
4-1