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4-4.
SERVICE
OF
THE
SPECIAL
PRINTED
CIRCUIT
BOARDS
4-4-1.
SERVICE
OF
THE
RP-30
PRINTED
CIRCUIT
BOARD
1.
Remove
the
Upper
Case.
2.
Remove
the
two
fixing
screws
as
shown
in
the
By
claw
3.
Lift up and
then open
the RP-30
Board.
(When
the RP-30 Board
is put back, raise up the
Board
slightly to lock it in place.)
4.
Lift
the
claws
on
the
shield
case
and
remove
the lid.
Removal
of the
shield
case
on
the
component
side:
Lift the five claws
and remove
the lid.
Removal
of the shield
case
on
the
soldering
side:
Lift the six claws
and remove
the lid.
(NOTE)
When
the
unit
is
rack-mounted,
pull
the
unit
from
the
rack.
Remove
the
Inner
Members
of
the
Slides
Rails
and
then
service
the
unit.
4-4-2.
REPLACEMENT
OF
PARTS
ON
THE
HN-80
PRINTED
CIRCUIT
BOARD
1.
Remove
the
Upper
Case.
2.
Remove
the
AU-83,
AU-84,
AU-85
and
BC-11
Boards.
3.
Open
the
MD-44
Board.
4. Unsolder
and replace parts
as necessary.
(NOTE)
Never
remove
the
HN-80
Board
from
the
unit
when
replacing
parts
on this
Board.
4-4-3.
REMOVAL
OF THE PD-37 PRINTED
CIRCUIT
BOARD
1.
Remove
the
Upper
Case.
2.
Remove
the
Cassette-up
Compartment.
3.
Remove
the
Bottom
Plate
and
then
open
the
SY-102
Board.
4. Disconnect
the
seven
connectors
on
the
PD-37
Board
from
the bottom
of the unit.
9.
Disconnect
the
four
connectors
on
the
PD-37
Board
from
the top of the unit.
6. Remove
the
two
white
fasteners.
Pull
up
the
PD-37
Board.
7.
Install
the
PD-37
Board
to the
unit
by
reversing
steps (1) to (6).
4-4-4.
REPLACEMENT
OF
THE
MB-139
PRINTED
CIRCUIT
BOARD
. Removal
1.
Remove
the
Upper
Case
and
all
the
plug-in
boards.
2.
Remove
the
Bottom
Plate
and
open
the
SY-102
Board.
3.
Disconnect
all
the
connectors
on
the
SY-102
Board
and
then
remove
the
SY-102
Board.
4.
Remove
the twelve
fixing screws
in the holes on
the
MB-127
Board.
(Be
careful
not
to drop
the
screws
into the unit.)
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