KT-990D
CONTENTS
DISASSEMBLY
FOR
REPAIR
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2
PE
BOARD
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27
BLOCK
DIAGRAM...........:essssssssessseesensseerseneesseeseaeeenenseneneees
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SCHEMATIC
DIAGRAM.........
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33
CIRCUIT
DESCRIPTION...
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EXPLODED.
VIEW
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41
ADJUSTMENT
PARTS
LIST
REGLAGE..............
SPECIFICATIONS...
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PA
BG
LEIGH
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DISASSEMBLY
FOR
REPAIR
(Remove
the
metallic
cabinet
before
proceeding
to
the
following.)
1.
Loosen
the
screw
on
the
tuning
control
knob,
and
take
out
the
knob.
Then,
remove
the
hex
nut
attached
to
the
tuning
shaft
(@).
2.
Remove
the
4
screws
fixing
the
front
panel
to
the
sub-panel
from
the
bottom
side
(@),
disengage
the
4
lugs
on
the
top
side,
and
take
out
the
front
panel
in
the
direction
of
the
arrow.
3.
Remove
the
2
screws
fixing
the
sub-panel
to
the
chassis
(@).
4.
Remove
the
2
screws
fixing
the
Sub-Circuit
Unit
(X13-
5750-11)
(A/4)
to
the
metal
fixture
(@),
and
take
out
the
Sub-Circuit
Unit
in
the
direction
of
the
arrow.
5.
When
attaching
the
Sub-Circuit
Unit
(X13-)
(A/4),
take
care
to
insert
the
PC
board
between
the
lugs
on
the
sub-panel
(@).
6.
Place
a
cloth
on
the
set
main
body,
place
the
sub-panel
on
the
cloth
as
shown
in
the
illustration,
disengage
the
lugs
fixing
the
Sub-Circuit
Units
(X13-)
(B/4)
and
(C/4)
to
the
sub-panel
(@).
and
take
out
the
PC
boards
in
the
direction
of
the
arrow.
7.
Remove
the
5
screws
fixing
the
rear
panel
to
the
chassis
(@).
8.
Remove
the
8
screws
fixing
the
Tuner
Unit
(X05-34
20-
11)
to
the
chassis
(@).
9.
Take
out
the
Tuner
Unit
(XO5-)
in
the
direction
of
the
arrow
(@).
Be
careful
not
to
hit
the
metal
fixture
(No.
718
in
the
exploded
view
diagram)
at
this
time.
